PhD Institute of Solid State Physics, Chernogolovka, 1988
Professor Kravchenko is studying the low temperature (millikelvin) properties of low-dimensional disordered systems by means of transport, capacitance, and magnetization measurements. His primary interest is to understand the nature of the anomalous metal-insulator transition in strongly interacting two-dimensional electron systems, discovered by him and his collaborators, and to determine its phase diagram. This discovery was subject of editorial papers in Physics Today (twice in 1997), The Economist (1997), Nature (1997, 1999, 2003), Science (1998, 2000), Nature Physics (2007), Science Daily (2007), and elsewhere, and listed on the American Physical Society timeline as one of 50 main discoveries in mesoscopic physics of the last century (see http://nuweb.neu.edu/skravchenko/myweb3/news.htm). It is still not known what physical mechanism is responsible for the metal-insulator transition, whether or not the resistance of the metallic state tends to zero in the millikelvin temperature range, or whether or not the system becomes magnetic. The experiments include studies of Si metal-oxide-semiconductor field-effect transistors, p-SiGe heterostructures, and GaAs/AlGaAs heterostructures at temperatures down to 20 millikelvin and at magnetic fields up to 10 tesla.
Selected Recent Publications:
1. A. Mokashi, S. Li, B. Wen, S. V. Kravchenko, A. A. Shashkin, V. T. Dolgopolov, and M. P. Sarachik, “Critical Behavior of a Strongly Interacting 2D Electron System”, Phys. Rev. Lett. 109, 096405 (2012).
2. B. Spivak, S. V. Kravchenko, S. A. Kivelson, and X. P. A. Gao “Transport in Strongly Correlated Two Dimensional Electron Fluids”, Rev. Mod. Phys. 82, 1743 (2010).
3. S. Anissimova, S. V. Kravchenko, A. Punnoose, A. M. Finkelstein, and T. M. Klapwijk “Flow Diagram of the Metal-Insulator Transition in Two Dimensions” Nature Phys. 3, 707 (2007).
4. S. Anissimova, A. Venkatesan, A. A. Shashkin, M. R. Sakr, S. V. Kravchenko, and T. M. Klapwijk “Magnetization of a Strongly Interacting Two-Dimensional Electron System in Perpendicular Magnetic Fields” Phys. Rev. Lett. 96, 046409 (2006).
5. A. A. Shashkin, S. Anissimova, M. R. Sakr, S. V. Kravchenko, V. T. Dolgopolov, and T. M. Klapwijk “Pauli Spin Susceptibility of a Strongly Correlated 2D Electron Liquid” Phys. Rev. Lett. 96, 036403 (2006).