Novel nanofabrication techniques for studies the effects of reduced dimensionality on electric transport and exploration of these effects in the design of new types of electronic and magnetic devices.
In particularly, the research program is focused on:
- Electrochemical methods and controlled break-junctions technique (mechanically and controlled electro-migration made) for study ballistic transport in metals, molecular conductance, tunnel junctions in quasi–equilibrium state and non-equilibrium magnetic phase transitions driven by spin-polarized current;
- Effects of proximity of ferroelectric on magneto-transport properties;
- Spin-dependent tunneling and tunneling magnetoresistance;
- Electro-resistive switching in transition-metal oxides.
This work involves a multi-disciplinary collaboration with followed groups:
International: B. Doudin (IPCMS, France), H. Nakamura (Kyoto University, Japan), M. Shiga (Kyoto University, Japan), W. Wernsdorfer (CNRS, France), E. Ovchenkov (MSU, Russia)
Domestic: J. Redepenning (Chem. Dept., UNL), E. Tsymbal (Phys. Dept., UNL), I. Mariyenko (POC), R. Sabirianov (UNO), I. Sabirianov (Elect. Eng., UNL), , P. Dowben (Phys. Dept., UNL), S. Ducharme (Phys. Dept., UNL), I. Ketsman (Phys. Dept., UNL), S. Adenwalla (Phys. Dept., UNL)
The research has been featured by: The Economist, Materials Today, the American Institute of Physics, the Institute of Physics, UK, Computerra (Russian), Futura-Sciences (France) etc.].
A. Sokolov, “Quantum ballistics”, Physics World 20, 27-30 (2007).
A. Sokolov, C. Zhang, E. Y. Tsymbal, J. Redepenning, and B. Doudin, “Quantized Magneto-resistance in Atomic-size Contacts”, Nature Nanotechnology 2, 171 - 175 (2007).
J. Xiao, A. Sokolov, and P.A. Dowben, “Changing band offsets in copper phthalocyanine to copolymer poly(vinylidene fluoride with trifluoroethylene) heterojunctions,” Appl. Phys. Lett. 90, 242907 (2007).
E.Y. Tsymbal, A. Sokolov, I.F. Sabirianov, and B. Doudin, and “Resonant inversion of tunneling magnetoresistance,” Phys. Rev. Lett. 90, 186602 (2003).
A. N. Caruso, D.-Q. Feng, Ya. B. Losovyj, D. L. Schulz, Snjezana Balaz, Luis G. Rosa, A. Sokolov, B. Doudin, and P. A. Dowben, “Defect contributions to conductivity in poly(3-hexylthiophene)?” Phys. Stat. Sol. (b) 243, No. 6, 1321–1330 (2006).
N. Pilet, C. Borca, A. Sokolov, E. Ovtchenkov, B. Xu, and B. Doudin, “Interface composition and electronic properties of chromium (III, IV) oxides junctions,” Materials Letters 58, 2016 (2004).
A. Sokolov, I.F. Sabirianov, E.Y. Tsymbal, B. Doudin, X.Z. Li, and J. Redepenning, “Resonant tunneling in magnetoresistive Ni/NiO/Co nanowire junctions,” J. Appl. Phys. 93, 7029 (2003).
L. Bernard, J. Monson, A. Sokolov, Z.-Y. Liu, C.-S. Yang, P.A. Dowben, B. Doudin, A. Harken, P. Welsch, and B.W. Robertson, “Magnetoresistance in boron carbide junctions,” Appl. Phys. Lett. 83, 3743-3745 (2003).
A. Sokolov, C.-S. Yang, L. Yuan, S.H. Liou, R. Cheng, H.-K. Jeong, T. Komesu, B. Xu, C.N. Borca, P.A. Dowben, and B. Doudin, “Zero bias anomaly magnetoresistance of CrO2 junctions,” Europhysics Letters 58, 448 (2002)
A. Sokolov, R. Sabirianov, W. Wernsdorfer, and B. Doudin, “Magnetization reversal of individual nanowires with controlled defects,” J. Appl. Phys. 91, 7059 (2002).