物理系学术报告 Physics Department Colloquium
Berryphase effects on electronic properties
Department of Physics, University of Texas, Austin, TX 78712, USA
International Center for Quantum Materials, Peking University, Beijing, China
Berry curvature and orbital moment of the Bloch state are two basic ingredients, in addition to the band energy, that must
be included in the formulation of semiclassical dynamics of electrons in crystals, in order to give proper account of
thermodynamic and transport properties to first order in the electromagnetic field. These quantities are gauge invariant
and have direct physical significance as demonstrated by numerous applications in recent years. Generalization to the case
of degenerate bands has also been achieved, with important applications in spin-dependent transport. We have now
extended the theory to second order in electromagnetic fields, keeping the structure of the first order theory but greatly
expanding the scope of applications. I will illustrate two applications of the extended theory, magneto polarization and
nonlinear anomalous Hall effects.
Ph. D. Physics, Universityof Washington (1985)
M. S. Physics, Universityof Washington (1983)
B. S. Physics, PekingUniversity (1981)
Trull Centennial Professor, Universityof Texas (2001-).
Assistant and Associate Professor, University of Texas (1990-2001).
Visiting Scientist, UC Santa Barbara (1988-1990).
Research Associate, Universityof Illinois (1985--1987)