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Theory of electric polarization induced by inhomogeneity in crystals
Di Xiao, Junren Shi, Dennis P. Clougherty +1
We develop a general theory of electric polarization induced by inhomogeneity in crystals. We show that contributions to polarization can be classified in powers of the gradient of…
Valley contrasting physics in graphene: magnetic moment and topological transport
Di Xiao, Wang Yao, Qian Niu
We investigate physical properties that can be used to distinguish the valley degree of freedom in systems where inversion symmetry is broken, using graphene systems as examples. W…
Theory of Electromotive Force Induced by Domain Wall Motion
Shengyuan A. Yang, Di Xiao, Qian Niu
We formulate a theory on the dynamics of conduction electrons in the presence of moving magnetic textures in ferromagnetic materials. We show that the variation of local magnetizat…
Valley Dependent Optoelectronics from Inversion Symmetry Breaking
Wang Yao, Di Xiao, Qian Niu
Inversion symmetry breaking allows contrasted circular dichroism in different k-space regions, which takes the extreme form of optical selection rules for interband transitions at…
Quantum Theory of Orbital Magnetization and its Generalization to Interacting Systems
Junren Shi, G. Vignale, Di Xiao +1
Based on standard perturbation theory, we present a full quantum derivation of the formula for the orbital magnetization in periodic systems. The derivation is generally valid for…
Theory of conserved spin current and its application to two dimensional hole gas
Ping Zhang, Zhigang Wang, Junren Shi +2
We present a detailed microscopic theory of the conserved spin current which is introduced by us [Phys. Rev. Lett. \textbf{96}, 196602 (2006)] and satisfies the spin continuity equ…