News 2019

October 18, 2019, Our article titled “Room Temperature Giant Magnetostriction in Single-crystal Nickel Nanowires. is selected for cover art and featured in Nature NPG Asia Materials.

October 18, 2019, Our article titled “Room Temperature Giant Magnetostriction in Single-crystal Nickel Nanowires. is published in Nature NPG Asia Materials: NPG Asia Materials volume 11, Article number: 59 (2019)

August 22, 2019, Our article titled “Nanoscale Topological Defects and Improper Ferroelectric Domains in Multiferroic Barium Hexaferrite Nanocrystals. is published by the American Physical Society:  Phys. Rev. B 100, 054432, 2019.

August 15, 2019: The  Fohtung Research Group is officially relocated to the Materials Science and Engineering Department of Rensselaer Polytechnic Institute (RPI).

August 15, 2019: Prof. Fohtung joins the Materials Science and Engineering Department of Rensselaer Polytechnic Institute (RPI), Troy New York as an Associate Professor.

April 22, 2019, Our article titled “Strain vs. charge mediated magnetoelectric coupling across the magnetic oxide/ferroelectric interfaces. is published by the Royal Society of Chemistry: RSC Advances 9 (29), 13033-13041, 2019.

April 10, 2019: Prof. Fohtung presents the group’s latest results as an invited seminar at the Division of Synchrotron Radiation, of the Physics Department at Lund University, Sweden.  Prof. Edwin Fohtung presents the groups latest results in as an invited talk titled “X-ray mapping of Topological Relics of Symmetry Breaking in Ferroics using Coherent X-ray Probes. This research project is generously funded by the  DOD AFOSR.

March 28, 2019, Our article titled ” Bragg Coherent Diffractive Imaging of Strain at the Nanoscale” is published in the Journal of Applied Physics.

March 18, 2019: Prof. Fohtung presents the group’s latest results as an invited talk at the Institute for Photon Science (IPS), of the Karlsruhe Institute of Technology (KIT), Karlsruhe Germany  (03.18.2019).  Prof. Edwin Fohtung presents the groups latest results in as an invited talk titled ” X-ray Nanovision of Ferroic Phases in Multiferroics. This research project is generously funded by the  DOD AFOSR.

March 14, 2019, Our article titled “Enhanced magnetism in lightly doped manganite heterostructures: strain or stoichiometry?” is published in Nanoscale, 2019,11, 7364-7370; http://dx.doi.org/10.1039/C8NR09693G

March 10-14, 2019, Dmitry Karpov presented our group research as an invited oral talk (titled “Three-dimensional imaging of vortex phase in ferroic materials”) at the TMS Annual Meeting & Exhibition Symposium on Characterization of Materials through High-Resolution Imaging held in San Antonio, TX.

News 2018

December 14, 2018, Tassos presents some of the group’s recent findings as a seminar at LANL titled “Advanced electronic and energy materials through coherent scattering techniques”.

November 23, 2018, Dmitry Karpov presented his research conducted at the Fohtung Research Group in a poster and a flash-talk (titled “Three-dimensional imaging of ferroic materials using coherent X-rays”) at an annual PSI Condensed Matter Retreat at the Swiss Federal Laboratories for Materials Science and Technology (EMPA, Dübendorf), winning a poster prize. Link to the book of abstracts (page 59): https://tinyurl.com/y7umtjhv

September 23, 2018, Our book  chapter titled “Bragg Coherent Diffraction Imaging Techniques at 3rd and 4th Generation Light Sources” is published in the book “Materials Discovery and Design” as part of the Springer Series in Materials Science book series (SSMATERIALS, volume 280)

Prof. Edwin Fohtung Presents the groups latest results in as an invited talk at RPI.  This research project is generously funded by the LANS/DOE, the LANSCE Professorship and LDRD in Los Alamos National Laboratory and the DOD AFOSR.  (09.12.2018)

 

September 13, 2018, Dr. Anastasios (Tassos) Pateras gives a physics colloquium and seminar at NMSU titled “Strain and Polarization Dynamics in Energy and ElectronicMaterials Through Novel X-Ray Imaging Techniques”

September 8, 2018, Dr. Anastasios Pateras joins from the University of Wisconsin, Madison. Welcome, Tasos!!

August 14, 2018, Dr. Dmitry Karpov leaves the group and joins the Swiss Light Source (SLS) at the Paul Scherrer Institut as a postdoctoral scientist at the Coherent Small-Angle X-ray Scattering cSAXS beamline. Congrats Dima!!

Prof. Fohtung presents the group’s latest results as an invited talk in the Coherence 2018: International Workshop on Phase Retrieval and Coherent Scattering at Port Jefferson, NY  (06.26.2018)

Prof. Edwin Fohtung presents the groups latest results in as an invited talk titled “ Imaging of ferroelectric vortices in complex oxides”. This research project is generously funded by the LANS/DOE, the LANSCE Professorship and LDRD in Los Alamos National Laboratory and the DOD AFOSR.

June 16, 2018, Dr. Richard Mbatang leaves the group and joins Intel corporation, Portland Oregon as a process engineer. Congrats Richard!!

May 16, 2018, Elijah Scholds joins the group. Welcome, Elijah!!

May 16, 2018, Dmitry Karpov Defends his Ph.D. Dissertation. Congrats Dima!!

May 07, 2018 Our article titled ” A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays” is published in the Journal of Applied Sciences

May 01, 2018, Hannah Rich leaves the group. You shall be missed Hannah!!

April 27, 2018, Dr. Edwin Fohtung receives a new $396 K three-year grant from the DOD- Airforce Office of Scientific Research

April 04, 2018 Hannah Rich Defends her MSc. Thesis. Congrats Hannah!!

April 04, 2018 Mohammad Abdullah Defends his MSc. Thesis. Congrats Mohammad!!

April 04, 2018 Binod Paudel Defends his MSc. Thesis. Congrats Binod!!

April 02, 2018 Richard Mbatang Defends his Ph.D. Dissertation. Congrats Richard!!

Prof. Fohtung presents the group’s latest results as an invited talk in the Condensed Matter Physics Seminar Series in the Department of Physics at Colorado State University, Fort Collins, Co (02.06.2018)

Prof. Edwin Fohtung presents the groups latest results in as an invited talk titled “ Nanoscale Imaging of Topological Relics of Symmetry Breaking in Oxide Nanostructures”. This research project is generously funded by the LANS/DOE, the LANSCE Professorship and LDRD in Los Alamos National Laboratory and the DOD AFOSR.

An Editorial Article on Coherent Diffraction Imaging Published in the Journal of Optics. (01.02 2018)

An Editorial in the Journal of Optics on “Special issue on coherent diffractive imaging” is published in J. Opt. 20 (2018) 010201. In this Editorial, we discussed recent advances in state of the art X-ray Coherent Diffraction Imaging Techniques.

News 2017

Article Published in Journal of PHYSICAL REVIEW APPLIED. (09.19.2017)

Our article titled “Enhanced energy storage with polar vortices in ferroelectric nanocomposites” is published in the Journal of Phys. Rev. Applied 8, 034014 (2017). In this article, we utilize Landau phase field computations to show that the switching behavior of the topological structure (vortex and antivortex pair) under an external electric field in BaTiO3 nanowires can be used to enhance the energy-storage efficiency over 95% at a relatively low electric field of 140 MV/m. Our findings demonstrate a  new strategy to enhance the energy-storage density with topological vortex structures in ferroelectric nanocomposites

Article Published in Journal of Physica Scripta.  (10.16.2017)

Our article titled “Pair Distribution Function Analysis applied to Decahedral Gold Nanoparticles” is published in the Journal of Physica Scripta, Vol. 92, number 11(2017). In this article, we explored the sensitivity of existing synchrotron x-ray PDF instruments for distinguishing four different simple models for our gold nanoparticles: a multiply twinned fcc decahedron with either a single gap or multiple distributed gaps, a relaxed body-centered orthorhombic (bco) decahedron, and a hybrid decahedron. PDF measurements provide a statistical description of the pair correlations of atoms within a material, allowing one to evaluate the probability of finding two atoms within a given distance.The data simulations of the models were then compared with experimental data from synchrotron x-ray total scattering. We present our experimentally derived atomistic models of the gold nanoparticles, with surprising results and a perspective on remaining challenges. Our findings provide evidence for the suitability of PDF analysis in the characterization of other nanosized particles that may have commercial applications.

Article Published in Nature Communications.  (08.28.2017)

Our article titled “Three-dimensional imaging of vortex structure in a ferroelectric nanoparticle driven by an electric field” has been published in Nature journal Nature Communications 8, Article number: 280 (2017) doi:10 1038/s41467-017-00318-9. This paper details recent advances in studying Topological defects such as complex and stable configurations of electric polarization on Barium individual Titanate Nanoparticles using Bragg Coherent x-ray diffraction imaging techniques.

Prof. Fohtung presents an invited lecture at the at the 2017 Advance Photon Source/Center for Nanoscale Materials Users Meeting Argonne National Laboratory in Lemont, IL (05.09.2017)

Prof. Edwin Fohtung presents the groups latest results in as an invited lecture titled “Bragg Coherent Diffractive Imaging of Topological Defects in Hexaferrites”. The work is funded by the LANS/DOE and the DOD AFOSR.

Welcome new group member Binod Paudel (04.05. 2017)

Binod Paudel joins the Fohtung Research Group as a PhD research assistant.

Dmirty Karpov presents a contributed poster at the 2017 COHERENCE WORKSHOP in PETRA IV, Deutsches Elektronen-Synchrotron. Which is a Research Centre of the Helmholtz Association. Hamburg Germany (06.27.2017)

Dima presents the group’s latest results in a poster titled “Nanoscale Imaging and Tracking of Vortex Dynamics in a Single Ferroic Nanoparticle”. This work is a joint collaboration with colleagues at NMSU, UCSD and LANL. The work is funded by the LANS/DOE and the DOD AFOSR.

Dmirty Karpov presents a contributed poster at the 2017 Advance Photon Source/Center for Nanoscale Materials Users Meeting Argonne National Laboratory in Lemont, IL (05.09.2017)

Dima presents the group’s latest results in a poster titled “Small Particles an even Bigger Data Problems in Bragg Coherent Diffractive Imaging “. This work is a joint collaboration with colleagues at NMSU, UCSD and LANL. The work is funded by the LANS/DOE and the DOD AFOSR.

Congratulations!! Samuel Succesfully defends his M.sc Degree (05.03. 2017)

Sam presents and defends his M.sc  degree in Computer sciences on his research work supported by the DOD and Los Alamos National Laboratory through our research group. In his thesis titled “Software for iterative phase retrieval” Sam  upgraded and designed a user friendly platform for a software capable of tracking dislocation in reconstructed X-ray Bragg  Coherent Diffraction data.

News archive 2016

Prof. Fohtung presents an invited talk titled Birefractive coherent diffractive imaging: novel probe for magneto-electric phases: SPIE – Spintronics-IX, Spin-Orbit Coupling Session: Optics & Photonics Conference, San Diego-CA, August 28th –September 1st 2016.

(08.30.2016)

Prof. Edwin Fohtung presents his groups latest results on a new imaging approach called Birefringent Coherent Diffraction imaging. This techniques takes advantage of the anisotropy of materials at the optical frequencies to provide contrast for magnetic, ferroelectric and defect imaging with sub micron resolution. The work is funded by the LANS/DOE, and DOD.

Prof. Fohtung presents an invited talk titled Probing of Electronic and Magnetic Phases Using Neutron Scattering: Young Researchers Meeting, Oak Ridge National Laboratory, Oak Ridge -TN, August 18th –19st 2016.

(08.18.2016)

Prof. Edwin Fohtung presents his groups latest results on probing of magnetic and electronic phases in PZT/LSMO heterostructures using polarized neutron reflectivity at Oakridge national Laboratory. This was a workshop organized by the Quantum Condensed Matter Group at Oakridge National laboratory. The work is funded by the LANS/DOE, and DOD.

Prof. Fohtung presents an invited talk titled Lens-Less Microscopy at Coherent Light Sources: Physics and Theory Colloquium Series, Los Alamos National Laboratory, NM. August 11th 2016.

(08.11.2016)

Prof. Edwin Fohtung presents his groups latest results on probing of soft and condensed matter systems using emergent imaging techniques at a Physics and Theory Colloquium Series, Los Alamos National Laboratory, NM. The work is funded by the LANS/DOE, and DOD.

Our paper on Ab initio study of magnetoelectric coupling in La0.66Sr0.33MnO3 / PbZr0.2Ti0.8O3 multiferroic heterostructures is published in Journal of Physics: Condensed Matter

(08.05.2016)

Prof. Fohtung presents an invited talk titled Towards Sub-nanometer Magnetic Imaging: Coherent Diffraction Imaging Techniques at Light Sources, Santa Fe, NM. July 21st -22nd 2016.

(07.21.2016)

Prof. Edwin Fohtung presents his groups latest results on advances in Coherent Diffraction Imaging Techniques in a MaRIE workshop on the Opportunities for New X-Ray Sources to Shed Light on Mesoscale Functional Materials, Santa Fe, NM. July 21st -22nd  2016 .The work is funded by the LANS/DOE, and DOD.

Prof. Fohtung presents an invited talk titled Coherent diffraction imaging Techniques at 3rd and 4th generation light sources:, Santa Fe, NM. May 16th -18st 2016.

(05.18.2016)

Prof. Edwin Fohtung presents his groups latest results on advances in Coherent Diffraction Imaging Techniques at LANL Workshops on Decadal Challenges of Materials Science and on MaRIE-related Science and Technology. Data Science Optimal Learning for Materials Discovery. The work is funded by the LANS/DOE, and DOD.

PHYS 215G – Engineering Physics I

General Information

Lecture prerequisite:  MATH 191G ( Calculus and Analytical Geometry).
Venue: Mondays, Wednesdays and Fridays, 09:30-10:20, GD Hall 230
Instructor: Professor Edwin Fohtung
office: GD Hall 259A, email: efohtung@nmsu.edu, office hours: Tuesdays 15:00-16:00, otherwise you may arrange a meeting by appointment.
Teaching Assistant: TBA
Textbook: Young & Freedman, University Physics with Modern Physics, 13th edition, Addison Wesley (required)

 

Course Overview

Calculus-level treatment of kinematics, work and energy, particle dynamics, conservation principles, simple harmonic motion. Prerequisite(s): MATH 191G. The aim of the course is to familiarize the student with concepts and methods used to find a workable description of the physical world. We cover the main principles of mechanics and show how these principles can be applied to solve real-world problems. Understanding of the concepts is stressed more than memorization of mathematical formulas, and the meaning behind the formulas is explained. The students are expected to develop quantitative and qualitative scientific reasoning skills and to acquire knowledge to approach problems found in engineering and scientific applications. See objectives at  http://assessment.nmsu.edu

It is quite important to do exercises and assignments, in order to digest notions and methods in engineering physics learned in the lectures. The assignments are not only used to help you understand the material but also to give you a broader insight from into the subject.

Grading Weighting: You may bring a calculator and one handwritten A4 letter-size sheet with any notes and equations you fit on it. No books, laptop computers, smart phones, etc. or any other print or electronic media are allowed in quizzes and exams
The final grade will be determined by the following weighing:

Homework                                      20%
Quizzes                                           20%
Midterm Exam                                25%
Final Comprehensive Exam            35%

TOTAL:                                        100%

Their problems will be largely selected from the problems found at the end of chapters and those discussed during the lectures.

Quizzes: There will be three classroom quizzes, with the lowest quiz grade being dropped. There are no makeup quizzes unless you have a medical doctor’s note or you are absent on university business.
Exams:  There will be two exams during the semester (see the schedule for dates) one midterm and one final comprehensive exam. There are no makeup exams.

 

Syllabus & Tentative Schedule

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Intermediate Modern Physics I

General Information

Lecture Info: Tuesdays and Thursdays, 10:20-11:35, GD Hall 218A
The prerequisites are PHY 315 (Modern Physics),  and MATH 392 (Introduction to Ordinary Differential Equations).
Office Hours: Wednesday, 15:00-16:00, otherwise you may arrange a meeting by appointment.
Instructor Info: Professor Edwin Fohtung
office: GD Hall 259A, email: efohtung@nmsu.edu
Teaching Assistant: TBA
Textbook: J. S. Townsend, “A Modern Approach to Quantum Mechanics,” 2nd Edition (required)

 

Course Overview

This is an upper-division course for quantum mechanics, and continues to PHY 455 “Intermediate Quantum Mechanics II”. As seen in the syllabus, the basics of quantum mechanics are taught in a self-contained manner. The course is suitable for undergraduate or graduate students who like to obtain comprehensive understanding of quantum theory and to master its mathematical treatments from scratch. In case you do not satisfy the above prerequisites, you may still discuss a registration with the instructor.

It is quite important to do exercises and assignements, in order to digest notions and methods in quantum mechanics learned in the lectures. The assignments are not only used to help you understand the material but also to give you a broader insight from into the subject.

The final grade will be determined based on performance of mid-term exams and assignments (their weights are 65 % and 35 % respectively, for now). Their problems will be largely selected from the problems found at the end of chapters. Each mid-term exam is arranged after every chapter is completed. That is how you can study rather narrow, clearly-defined selections of materials for every exam, while they are still fresh in your mind. Overall it is expected that your learning is more effective and at the same time the load by the course is less stressful this way.

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Syllabus

We plan to cover a good part of the textbook over the course of the semesters (Fall 2014). If time permits, I will explain briefly recent research activities related to quantum mechanics, quantum electronics and quantum information.

1. Stern-Gerlach experiments [Lecture note on the chapter 1]

2. Rotation of basis states and matrix mechanics [Lecture note on the chapter 2]

3. Angular momentum [Lecture note on the chapter 3]

4. Time evolution [Lecture note on the chapter 4]

6. Wave mechanics in one dimension [Lecture note on the chapter 6]

7. The one-dimensional harmonic oscillator [Lecture note on the chapter 7]

5. A system of two spin-1/2 particles [Lecture note on the chapter 5]

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Tentative Schedule

Thursday: TH,
Tuesday: TU

Dates Subject Home Work/Exams
Aug. 21,TH 1 Stern-Gerlach experiments: 1.1
Aug. 26,TU 1 Stern-Gerlach experiments: 1.2
Aug. 28,TH 1 Stern-Gerlach experiments – The Quantum state vector: 1.3
Sep. 02, TU 1 Stern-Gerlach experiments: 1.4-1.5 Assignment 1 is posted
Sep. 04, TH
Sep. 09, TU
Sep. 11, TH 2. Rotation and matrix mechanics 2.1-2.2
Sep. 16, TU 2. Rotation and matrix mechanics 2.1-2.2
Sep. 18, TH 2. Rotation and matrix mechanics 2.2
Sep. 23, TU 2. Rotation and matrix mechanics 2.3-2.4
Sep. 25, TH 2. Rotation and matrix mechanics 2.5-2.6
Sep. 30, TU 2. Rotation and matrix mechanics 2.6-2.7
Oct. 02, TH 2. Rotation and matrix mechanics 2.7-2.8
Oct. 07, TU 3. Angular momentum 3.1-3.2
Oct. 09, TH 3. Angular momentum 3.3
Oct. 14, TU 3. Angular momentum 3.3
Oct. 16, TH 3. Angular momentum 3.4-3.5
Oct. 21, TU 3. Angular momentum 3.6
Oct. 23, TH 3. Angular momentum 3.6-3.7
Oct. 28, TU 4. Time evolution 4.1
Oct. 30, TH 4. Time evolution 4.2-4.3
Nov.04, TU 4. Time evolution 4.3
Nov.06, TH 4. Time evolution 4.4
Nov.11, TU 4. Time evolution 4.4-4.5
Nov.13, TH 4. Time evolution 4.5-4.6
Nov.18, TU 6. Wave mechanics in one dimension: 6.1
Nov.20, TH 6. Wave mechanics in one dimension: 6.1-6.2
Nov.25-27 THANKS GIVING HOLIDAY
Nov.27, TH THANKS GIVING HOLIDAY
Dec.02, TU
Dec.04, TH
Dec.09, TU
Dec.11, TH

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Assignments

Students may study subjects of assignments together, but everyone is expected to prepare his/her original answer sheets.

1. Assignment due on Sep. 9 (Mon) [Problems: 1.3, 1.5, 1.6, 1.8 Solutions]

2. Assignment due on Sep. 23 (Mon) [Reading the section 2.7 and Problems: 2.8, 2.13, 2.16, 2.24 Solutions]

3. Assignment due on Oct. 7 (Mon) [Problems: 3.5, 3.7, 3.17, 3.19 Solutions]

4. Assignment due on Oct. 28 (Mon) [Problems: 4.4, 4.8, 4.11, 4.13 Solutions]

6. Assignment due on Nov. 11 (Mon) [Problems: 6.2, 6.4, 6.15, 6.23 Solutions]

7. Assignment due on Nov. 25 (Mon) [Problems: 7.4, 7.9, 7.13, 7.23 Solutions]

5. Assignment due on Dec. 13 (Fri) [Problems: 5.3, 5.5, 5.13, 5.17 Solutions]

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Exams

Students may study subjects of assignments together, but everyone is expected to prepare his/her original answer sheets.

1. Assignment due on Sep. 9 (Mon) [Problems: 1.3, 1.5, 1.6, 1.8 Solutions]

2. Assignment due on Sep. 23 (Mon) [Reading the section 2.7 and Problems: 2.8, 2.13, 2.16, 2.24 Solutions]

3. Assignment due on Oct. 7 (Mon) [Problems: 3.5, 3.7, 3.17, 3.19 Solutions]

4. Assignment due on Oct. 28 (Mon) [Problems: 4.4, 4.8, 4.11, 4.13 Solutions]

6. Assignment due on Nov. 11 (Mon) [Problems: 6.2, 6.4, 6.15, 6.23 Solutions]

7. Assignment due on Nov. 25 (Mon) [Problems: 7.4, 7.9, 7.13, 7.23 Solutions]

5. Assignment due on Dec. 13 (Fri) [Problems: 5.3, 5.5, 5.13, 5.17 Solutions]

Contacts

LANSCE Professor at NMSU Edwin Fohtung has two offices: one in NMSU during his teaching semester and one in Los Alamos National Lab for the remaining part of the year. Please, feel free to contact both.

LANL Contact
lanl.gov | efohtung@lanl.gov
Experimental Physical Sciences (ADEPS)
Los Alamos National Laboratory
MS H805 Los Alamos, NM 87545
phone: 505.667.4972
NMSU Contact
physics.nmsu.edu | efohtung@nmsu.edu
Department of Physics, New Mexico State University
MSC 3D, N. Horseshoe Dr., las Cruces NM 88003
phone: 575.646.5631 | Fax: 575.646.1932

Links

Here you will be able to see links to interesting sites. Examples:

Stanford Synchrotron Radiation Light Source (SSRL), Menlo Park, CA
European Synchrotron Radiation Facility (ESRF), Grenoble, France
Angströmquelle Karlsruhe (ANKA), Karlsruhe, Germany
Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
Diamond Light Source (Diamond), Oxfordshire, UK
French National Synchrotron Soleil  (Soleil), Paris, France

Sponsors

FohtungGroupFohtungGroup

Currently, Professor Fohtung’s research is generously funded  by Department of Defense (DOD) via the Air Force Office of Scientific Research ( AFOSR) and the Los Alamos National Laboratory as the LANSCE-ROSEN Professor.