Professor Kravchenko is studying the low temperature (millikelvin) properties of low-dimensional disordered systems by means of transport and capacitance measurements. His primary interest is to understand the nature of the anomalous metal-insulator transition in strongly interacting two-dimensional electron systems, recently discovered by him and his collaborators, and to determine its phase diagram. This discovery was reviewed in Physics Today, "Search and Discovery" section, July 1997, pp. 19-21; The Economist, "Science and Technology" section, July 1997, pp. 106-107; Nature, "News and Views" section, 389, 916 (1997), and elsewhere. At present, it is 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 magneto-transport and magneto-capacitance 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.
Articles
A metal-insulator transition in 2D: established facts and open questions (with M. P. Sarachik), Physics Faculty Publications (2010)
The discovery of a metallic state and a metal-insulator transition (MIT) in two-dimensional (2D) electron...
Transport in strongly correlated two dimensional electron fluids (with S. A. Kivelson, X. P. A. Gao, and X. P. A. Gao), Physics Faculty Publications (2010)
We present an overview of the measured transport properties of the two dimensional electron fluids...
Electron transport in a slot-gate Si MOSFET (with I. Shlimak, V. Ginodman, A. Butenko, and K.-J. Friedland), Physics Faculty Publications (2008)
The transversal and longitudinal resistance in the quantum Hall effect regime was measured in a...
Conductivity of a spin-polarized two-dimensional electron liquid in the ballistic regime (with A. A. Shashkin, E. V. Deviatov, V. T. Dolgopolov, A. A. Kapustin, S. Anissimova, A. Venkatesan, and T. M. Klapwijk), Physics Faculty Publications (2006)
In the ballistic regime, the metallic temperature dependence of the conductivity in a twodimensional electron...
Coherent backscattering near the two-dimensional metal-insulator transition (with Maryam Rahimi, S. Anissimova, M. R. Sakr, and T. M. Klapwijk), Physics Faculty Publications (2003)
We have studied corrections to conductivity due to the coherent backscattering in low-disordered two-dimensional electron...