9. 5. 2014. Seminar: Edib Dobardžić

 

Friday, 9 Maj 2014 at 2PM
IPB Library
Seminar organised by Scientific Computing Laboratory

Edib Dobaržić
Faculty of Physics, Belgrade University

Generalized Bloch's theorem and implications for Berry curvature

Abstract:

Bloch's theorem enables reduction of the eigenvalue problem of the single-particle Hamiltonian (overlap matrix, dynamical matrix, etc.), commuting with translational group, to a unit cell of a crystal. Besides this restriction, only to translations, it can be generalized to any symmetry group (being symmetry of a crystal) with a little help of group theory. This generalization provides a simple condition on Hamiltonian gauge in which Berry curvature, as an intrinsic magnetic field, maintains the symmetry of a crystal.