GERSHENSON LAB MESOSCOPIC PHYSICS and
QUANTUM COMPUTING



Quantum Effects in the
Conductivity of Strongly Correlated 2D Systems at milliKelvin Temperatures One of the outstanding
problems of modern solid state physics is the behavior of
stronglyinteracting and disordered electron systems. The fascinating physics
of strong correlations unveils when the Coulomb interaction energy exceeds
the Fermi energy. The theoretical description of 2D systems has not reached a
predictive “first principles” stage yet, very little is known about fundamentals
of strong electronelectron interactions, and about quantum ground state(s)
of disordered interacting 2D systems. It is anticipated that the phase
diagram of strongly interacting twodimensional (2D) systems is remarkably
rich: a multitude of electronic phases might lie between the limiting cases
of a conventional paramagnetic Fermi liquid (high densities), Wigner crystal
(low densities, weak disorder), and paramagnetic strongly localized state
(strong disorder). Our experimental effort focuses on the study
of quantum effects in the conductivity of highmobility Sibased
MetalOxideSemiconductor Field Effect Transistors (Si
MOSFETs).
Selected Publications:
V. M. Pudalov, M. E. Gershenson, N. N. Klimov, and H. Kojima. Quenched disorder effects in electron transport in Si inversion layers in the dilute regime. JETP Lett. 82, 412417 (2005).
V. M. Pudalov, M. Gershenson, and H. Kojima, On the electronelectron interactions in two dimensions, in Fundamental Problems of Mesoscopic Physics, eds. I. V. Lerner et al., pp. 309327 (Kluwer Academic Publishers, Dordrecht, 2004).
V. M. Pudalov, M. E. Gershenson, H. Kojima, G. Brunthaler, A. Prinz, and G. Bauer, Interaction effects in conductivity of Si inversion layers at intermediate temperatures. Phys. Rev. Lett. 91, 126403 14 (2003). V. M. Pudalov,
M. E. Gershenson, H. Kojima, N. Butch, E. M. Dizhur, G. Brunthaler,
A. Prinz, and G. Bauer. The lowdensity spin susceptibility and
effective mass of mobile electrons in Si inversion layers. Phys. Rev. Lett.
88, 196404 (2002). M. E. Gershenson,
V. M. Pudalov, H. Kojima, N. Butch, E. M. Dizhur, G. Brunthaler,
A. Prinz, and G. Bauer. Crossed magnetic field technique for
studying spin and orbital properties of 2d electrons in the dilute regime.
Physica E 12, 585 (2002).
