I received my PhD in Physics from Tulane University where, as a Louisiana Board of Regents Graduate Fellow, I studied the effects of chemical substitution on strongly correlated electron materials using advanced materials synthesis techniques.
Shortly thereafter I joined the Neutron Scattering Group in CMPMSD at Brookhaven National Laboratory, where I investigated the lattice dynamics in iron-based superconductors using neutron spectroscopy, and assisted in the development of a new scattering instrument at Oak Ridge National Lab, HYSPEC. As a former member of MPA-CMMS at Los Alamos National Lab, I am used neutrons to study how magnetic frustration and anisotropy affect emergent phases observed near superconductivity, and the spin dynamics of skyrmion lattices.
My work has generated considerable impact in my field; my more than thirty publications, appearing in journals such as Nature Physics, Nature Materials, and Nature Communications, have already been cited nearly six hundred times. My broader research interests include the complex role of magnetic interactions in quantum materials, which have the potential for future functionality, and machine learning for materials research.
I currently work in the Information Systems and Modeling (A-1) Group at Los Alamos National Laboratory (LANL), working on Power Grid and optimization problems.
Using a number of different Time of Flight and Thermal/Cold Triple Axis instruments at Oak Ridge National Laboratory's Spallation Neutron Source (SNS) and High-Flux Isotope Reactor (HFIR), NIST's Center for Neutron Research reactor (NCNR), Helmholtz-Zentrum Berlin (BER-II), Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM-II) and the STFC Rutherford Appleton Laboratory
Materials sythesis of strongly correlated electron materials, such as complex layered oxides, iron chalcogenides, non-centrosymmetric intermetallics, and heavy fermion compounds. Using optical floating zone method with an imaging furnace, flux method, vapor transport method, Bridgman method, Czochralski method, and thermal evaporation of thin films
Experience with polarized neutron scattering incl. spherical polarimetry with CRYOPAD and a variety of polarizers/analyzers incl. Heusler, supermirror and 3He cells
Using a variety of methods including resistivity, heat capacity, magnetization and ac susceptibility, neutron and x-ray diffraction (XRD)
Using laboratory X-ray diffractometers, including powder and single crystal x-ray diffraction for sample characterization and structure analysis and Laue X-ray diffraction for determination of sample orientation
Experience with using a variety of sample environments incl. superconducting magnets, 3He cryostats, and closed-cycle refrigerators, and custom sample holder design.
Modeling and data analysis and production of publication/presentation quality figures, development of a custom python library for neutron scattering data analysis (NeutronPy), and instrument control and custom automated measurement program design
Using such techniques as scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDXS), scanning tunneling microscopy (STM), low energy electron diffraction (LEED), X-ray photoemission spectroscopy (XPS) and angle resolved photoemission spectroscopy (ARPES).
Scientist in the Information Systems and Modeling Group (A-1)
Investigation of the magnetism dynamics of heavy fermion compounds and skyrmion materials using neutron spectroscopy, discovering an intimate connection between the modulated magnetic states of CeRhIn5 and its high nematic susceptibility, and making the first measurements of the spin excitation spectra of skyrmion compound MnSi via neutron Time of Flight spectroscopy. Also designed and successfully tested a versatile new uniaxial strain device for use in small angle neutron scattering
Study of the lattice dynamics in the iron chalcogenide superconducting family Fe(1+y)Te(1-x)Se(x) using neutron scattering, finding evidence for an orbital ordering transition in parent compound FeTe, appearing as a Bond-Order-Wave, and for an intimate coupling between magnetic fluctuations and the lattice degree of freedom resulting in the appearance of a "forbidden" phonon. Also participated in the comissioning of a hybrid spectrometer (HYSPEC) at Oak Ridge National Lab's Spallation Neutron Source, and began developement of NeutronPy
Investigation of the superconductivity as a function of excess-Fe content in iron chalcogenide superconductor family Fe(1+y)Te(1-x)Se(x) via materials synthesis, bulk characterization techniques, and neutron scattering
Study of the orbital physics of layered strontium ruthenates, uncovering the orbital-selective nature of the metamagnetism in Sr4Ru3O10, unusual switching behavior in Ca3Ru2O7, and showing the viability for bolometric detection of Ca2RuO4
Floating zone single crystal synthesis of layered perovskite ruthenates of the Ruddlesden-Popper series, focusing on studying the effects of dopants such as Ca for Sr, and Ti for Ru
Dissertation: 'Orbital dependence of magnetism in layered ruthenate systems'
Advisor: Zhiqiang Mao
Awarded to 30 applicants per year, only 5-10 for domestic travel.
Travel award to present my research at the 2009 APS March Meeting.
560 young scientists selected (only 50 from the US) out of 20,000 applicants
Graduate Studeis support. One award out of approx. 15 incoming graduate applicants in Physics.
Offered to students in their first two years with a 3.4 GPA or greater, and are within the top 20% of their class.
Authored and co-authored 66 successful proposals for neutron beam time at various international and domestic neutron sources since 2012, with an acceptance rate of more than 95%. The corresponding allocated beam time consists of of 336 days, which corresponds to approximately $6,720,000 in third party funding, where neutron beam time is typical estimated to cost in excess of ~20,000/day.
Framework for On-Demand Cloud Computation of Theoretical Models of Materials over Discretized Phase Volumes
Designed and taught a course on introductory Python to members of MPA-CMMS at LANL.
Provided private tutoring services for undergraduates in the introductory Modern Physics course
Provided private tutoring services for undergraduates in the introductory Thermodynamics course
Provided private tutoring services for undergraduates in the Partial Differential Equations course
Provided tutoring services for students of the undergraduate General Physics course
Provided tutoring services for students of the undergraduate General Physics course
D. M. Fobes, S. Zhang, S.-Z. Lin, P. Das, N. J. Ghimire, E. D. Bauer, J. D. Thompson, L. W. Harriger, G. Ehlers, A. Podlesnyak, R. I. Bewley, A. Sazonov, V. Hutanu, F. Ronning, C. D. Batista, and M. Janoschek
Y. Luo, S.-Z. Lin, D. M. Fobes, Z. Liu, E. D. Bauer, J. B. Betts, A. Migliori, J. D. Thompson, M. Janoschek, and B. Maiorov
Y. Luo, S.-Z. Lin, M. Leroux, N. Wakeham, D. M. Fobes, E. D. Bauer, J. B. Betts, J. D. Thompson, A. Migliori, M. Janoschek, B. Maiorov
D. M. Fobes, S.-Z. Lin, N. J. Ghimire, E. D. Bauer, J. D. Thompson, M. Bleuel, L. M. DeBeer-Schmitt, and M. Janoschek
D. M. Fobes, M. Janoschek
D. M. Fobes, Y. Luo, N. Leon, E. D. Bauer, V. R. Fanelli, M. A. Taylor, L. M. DeBeer-Schmitt, and M. Janoschek
D. Halwidl, W. Mayr-Schmölzer, D. Fobes, J. Peng, Z. Q\. Mao, M. Schmid, F. Mittendorfer, J. Redinger, and U. Diebold
D. M. Fobes, E. D. Bauer, J. D. Thompson, A. Sazonov, V. Hutanu, F. Ronning, and M. Janoschek
D. Fobes, I. A. Zaliznyak, J. M. Tranquada, Z. Xu, G. Gu, X.-G. He, W. Ku, Y. Zhao, M. Matsuda, V. Garlea, and B. Winn
D. Halwidl, B. Stöger, W. Mayr-Schmölzer, J. Pavelec , D. M. Fobes, J. Peng, Z. Q. Mao, G. Parkinson, M. Schmid, F. Mittendorfer, J. Redinger, and U. Diebold
B. Stöger, M. Hieckel, F. Mittendorfer, Z. Wang, M. Schmid, G. S. Parkinson, D. M. Fobes, J. Peng, J. E. Ortmann, A. Limbeck, Z. Q. Mao, J. Redinger, and U. Diebold
B. Stöger, M. Hieckel, F. Mittendorfer, Z. Wang, D. Fobes, J. Peng, Z. Q. Mao, M. Schmid, J. Redinger, and U. Diebold
R. Bliem, R. Kosak, L. Perneczky, Z. Novotny, O. Gamba, D. Fobes, Z. Q. Mao, M. Schmid, U. Diebold, P. Blaha, and G. S. Parkinson
D. Fobes, I. A. Zaliznyak, Z. Xu, R. Zhong, G. Gu, J. M. Tranquada, L. Harriger, D. Singh, O. Garlea, M. Lumsden, and B. Winn
Y. A. Ying, N. E. Staley, Y. Xin, K. Sun, X. Cai, D. Fobes, T. J. Liu, Z. Q. Mao, and Y. Liu
J. Peng, X. Ke, G. C. Wang, J. E. Ortmann, D. Fobes, T. Hong, W. Tian, X. S. Wu, and Z. Q. Mao
X. Cai, Y. A. Ying, N. E. Staley, Y. Xin, D. Fobes, T. J. Liu, Z. Q. Mao, and Y. Liu
Z. Qu, J. Peng, T. J. Liu, D. Fobes, V. Dobrosavljevic, L. Spinu, and Z. Q. Mao
B. Qian, J. Lee, J. Hu, G. C. Wang, P. Kumar, M. H. Fang, T. J. Liu, D. Fobes, H. Pham, L. Spinu, X. S. Wu, M. Green, S. H. Lee, and Z. Q. Mao
D. Fobes, E. Vehstedt, G. C. Wang, T. J. Liu, Z. Q. Mao
V. Thampy, J. Kang, J. A. Rodriguez-Rivera, W. Bao, A. T. Savici, J. Hu, T. J. Liu, B. Qian, D. Fobes, Z. Q. Mao, C. B. Fu, W. C. Chen, Q. Ye, R. W. Erwin, T. R. Gentile, Z. Tesanovic, and C. Broholm
D. Fobes, J. Peng, Z. Qu, T. J. Liu, and Z. Q. Mao
T. J. Liu, J. Hu, B. Qian, D. M. Fobes, Z. Q. Mao, W. Bao, M. Reehuis, S. A. J. Kimber, K. Prokes, S. Matas, D. N. Argyriou, A. Hiess, A. Rotaru, H. Pham, L. Spinu, Y. Qiu, V. Thampy, A. T. Savici, J. A. Rodriguez, and C. Broholm
J. Peng, Z. Qu, B. Qian, D. Fobes, T. J. Liu, X. Wu, H. M. Pham, L. Spinu, and Z. Q. Mao
D. Fobes, T. J. Liu, Z. Qu, H. Q. Yuan, M. Salamon, M. Zhou, J. Hooper, and Z. Q. Mao
H. Guo, Y. Li, D. Urbina, B. Hu, R. Jin, T. Liu, D. Fobes, Z. Q. Mao, E. W. Plummer, and J. Zhang
Y. A. Ying, Y. Xin, B. W. Clouser, E. Hao, N. E. Staley, R. J. Myers, L. F. Allard, D. Fobes, T. Liu, Z. Q. Mao, and Y. Liu
T. J. Liu, X. Ke, B. Qian, J. Hu, D. M. Fobes, E. K. Vehstedt, H. Pham, J. H. Yang, M. H. Fang, L. Spinu, P. Schiffer, Y. Liu, Z. Q. Mao
Z. Qu, J. Peng, T. J. Liu, D. Fobes, L. Spinu, and Z. Q. Mao
Y. Nakajima, Y. Matsumoto, D. Fobes, M. Zhou, Z. Q. Mao, and T. Tamegai
Z. Qu, L. Spinu, H. Yuan, V. Dobrosavljević, W. Bao, J. W. Lynn, M. Nicklas, J. Peng, T. Liu, D. Fobes, E. Flesch, and Z. Q. Mao
X. Xu, Z. Xu, T. Liu, D. Fobes, Z. Mao, Y. Liu
Z. Xu, X. Xu, R. Freitas, Z. Long, M. Zhou, D. Fobes, M. Fang, P. Schiffer, Z. Mao, and Y. Liu
D. Fobes, M. H. Yu, M. Zhou, J. Hooper, C. J. O'Connor, M. Rosario, and Z. Q. Mao
J. Hooper, M. H. Fang, M. Zhou, D. Fobes, N. Dang, Z. Q. Mao, C. M. Feng, Z. A. Xu, M. H. Yu, C. J. O'Connor, G. J. Xu, N. Andersen, and M. Salamon
M. Zhou, J. Hooper, D. Fobes, Z. Q. Mao, V. Golubb and C. J. O'Connor