Evgeny Tsymbal, George Holmes University Distinguished Professor & Director (MRSEC)
The research program of Evgeny Tsymbal is focused on the fundamental understanding and the prediction of new functional properties of nanoscale magnetic and ferroelectric materials and structures relevant to device applications such as sensors, memories and storage. First-principles calculations along with model approaches are employed to address a wide range of immensely challenging problems on different levels of complexity. An important ingredient of the research is a strong link to experimental investigations being performed at the University of Nebraska and in other academic and industrial laboratories throughout the world.
Some of the recent research activities include:
- two-dimensional electron gases at oxide interfaces
- spin-dependent tunnelling and tunnelling magnetoresistance;
- resonant effects in quantum transmission involving interface and defect states;
- spin injection into semiconductors;
- electronic and atomic structure of ferromagnet/organic interfaces;
- interlayer exchange coupling in magnetic layered structures;
- ballistic conductance of magnetic nanocontacts and nanowires;
- domain-wall resistance in constrained geometries;
- ballistic and tunnelling anisotropic magnetoresistance in tunnel and break junctions;
- ferroelectric properties of thin films;
- resistive switching of ferroelectric tunnel junctions;
- magnetoelectric effects at ferromagnet/ferroelectric interfaces.
Evgeny Tsymbal’s research has been funded by National Science Foundation, Nebraska Research Initiative, Seagate Corporation, W. M. Keck Foundation, Office of Naval Research, and Nanoelectronics Research Initiative of Semiconductor Research Corporation.
- P. Lukashev, A. Wysocki, J. P. Velev, M. van Schilfgaarde, S. S. Jaswal, K. D. Belashchenko, and E. Y. Tsymbal, “Spin filtering with EuO: Insight from a complex band structure,” Phys. Rev. B 85, 224414 (2012).
- H. Lu, T. A. George, Y. Wang, I. Ketsman, J. D. Burton, C.-W. Bark, D. J. Kim, J. Wang, C. M. Folkman, C. Binek, P. A. Dowben, A. Sokolov, C.-B. Eom, E. Y. Tsymbal, and A. Gruverman, “"Electric Modulation of Magnetization at BaTiO3/La0.67Sr0.33MnO3 Interface,” Appl. Phys. Lett. 100, 232904 (2012).
- C. W. Bark, P. Sharma, Y. Wang, S. H. Beak, S. Lee, S. Ryu, C. M. Folkman, T. R. Paudel, A. Kumar, S. V. Kalinin, A. Sokolov, E. Y. Tsymbal, M. S. Rzchowski, A. Gruverman, and C. B. Eom, “Switchable induced polarization in LaAlO3/SrTiO3 heterostructures,” Nano Letters 12, 1765–1771 (2012).
- M. Ye. Zhuravlev, A. V. Vedyayev, K. D. Belashchenko, and E. Y. Tsymbal, “Coherent Potential Approximation as a Voltage Probe,” Phys. Rev. B 85, 115134 (2012).
- T. R. Paudel, S. S. Jaswal, and E. Y. Tsymbal, “Intrinsic defects in multiferroic BiFeO3 and their effect on magnetism,” Phys. Rev. B 85, 104409 (2012).
- X. Liu, Y. Wang, P. Lukashev, J. D. Burton, and E. Y. Tsymbal, “Interface dipole effect on thin film ferroelectric stability: First-principles and phenomenological modeling,” Phys. Rev. B 85, 125407 (2012).
- J. P. Velev, J. M. López-Encarnación, J. D. Burton, and E. Y. Tsymbal, “Multiferroic tunnel junctions with poly(vinylidene fluoride),” Phys. Rev. B, 125103 (2012). Selected Editors' Suggestion.
- H. Lu, X. Liu, J. D. Burton, Y. Wang, Y. Zhang, D. J. Kim, A. Stamm, P. Lukashev, C.-W. Bark, D. A. Felker, C. M. Folkman, P. Gao, X. Q. Pan, M. S. Rzchowski, C.-B. Eom, E. Y. Tsymbal, and A. Gruverman, “Enhancement of ferroelectric polarization stability by interface engineering,” Advanced Materials 24, 1209–1216 (2012).
- N. Pavlenko, T. Kopp, E. Y. Tsymbal, G. A. Sawatzky, and J. Mannhart, “Magnetism and superconductivity at LAO/STO-interfaces: the role of Ti 3d interface electrons,” Phys. Rev. B – Rapid Communications 85, 020407(R) (2012).
- E. Y. Tsymbal, News and Views: “Spintronics: Electric toggling of magnets,” Nature Materials 11, 12–13 (2012).
- J. D. Burton and E. Y. Tsymbal, “Highly spin-polarized conducting state at the interface between non-magnetic band insulators: LaAlO3/FeS2 (001),” Phys. Rev. Lett. 107, 166601 (2011).
- J. D. Burton and E. Y. Tsymbal, “A giant tunneling electroresistance effect driven by electrically controlled spin valve at a complex oxide interface,” Phys. Rev. Lett. 106, 157203 [4 pages] (2011). Synopsis featured in APS on-line publication "Physics".
- C. W. Bark, D. A. Felker, Y. Wang, Y. Zhang, H. W. Jang, C. M. Folkman, J. W. Park, S. H. Baek, X. Q. Pan, E. Y. Tsymbal, M. S. Rzchowski, and C. B. Eom, “Tailoring a two-dimensional electron gas at the LaAlO3/SrTiO3 (001) interface by epitaxial strain,” Proceedings of National Academy of Sciences 108, 4720 – 4724 (2011). Featured at UNL News Releases and Lincoln Journal Star.
- H. W. Jang, D. A. Felker, C. W. Bark, Y. Wang, M. K. Niranjan, C. T. Nelson, Y. Zhang, D. Su, C. M. Folkman, S. H. Baek, S. Lee, K. Janicka, Y. Zhu, X. Q. Pan, D. D. Fong, E. Y. Tsymbal, M. S. Rzchowski, and C. B. Eom, “Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations,” Science 331, 886 – 889 (2011). Featured at UNL News Releases and Lincoln Journal Star.
- J. M. López-Encarnación, J. D. Burton, E. Y. Tsymbal, and J. P. Velev, “Organic Multiferroic Tunnel Junctions with Ferroelectric Poly(vinylidene fluoride) Barriers”, Nano Letters 11, 599 – 603 (2011).
- K. Janicka, J. P. Velev, and E. Y. Tsymbal, "Quantum nature of two-dimensional electron gas confinement at LaAlO3/SrTiO3 interfaces," Physical Review Letters 102, 106803 (2009).
Books, Chapters, Reviews
- Evgeny Tsymbal co-edited a book "Multifunctional Oxide Heterostructures" which is published by Oxford University Press. The book is written by world-recognized scientists working in the field of complex oxides.
- Handbook of Spin Transport and Materials and Magnetism