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12 papers · 2 filters
Two-Dimensional Lattice Model for the Surface States of Topological Insulators
Yan-Feng Zhou, Hua Jiang, X. C. Xie +1
The surface states in three-dimensional (3D) topological insulators (TIs) can be described by a two-dimensional (2D) continuous Dirac Hamiltonian. However, there exists the Fermion…
Enhancing Thermoelectric Performance Using Nonlinear Transport Effects
Jian-Hua Jiang, Yoseph Imry
We study nonlinear transport effects on the maximum efficiency and power for both inelastic and elastic thermoelectric generators. The former refers to phonon-assisted hopping in d…
Electronic properties in a quantum well structure of Weyl semimetal
Wen-Long You, Xue-Feng Wang, Andrzej M. Oleś +1
We investigate the confined states and transport of three-dimensional Weyl electrons around a one-dimensional external rectangular electrostatic potential. Confined states with fin…
Effect of magnetic field on a magnetic topological insulator film with structural inversion asymmetry
Shu-feng Zhang, Hua Jiang, X. C. Xie +1
The effect of magnetic field on an ultrathin magnetic topological insulator film with structural inversion asymmetry is investigated. We introduce the phase diagram, calculate the…
Effective spin dephasing mechanism in confined two-dimensional topological insulators
Junjie Qi, Haiwen Liu, Hua Jiang +1
A Kramers pair of helical edge states in quantum spin Hall effect (QSHE) is robust against normal dephasing but not robust to spin dephasing. In our work, we provide an effective s…
Numerical study of the giant nonlocal resistance in spin-orbital coupled graphene
Zibo Wang, Haiwen Liu, Hua Jiang +1
Recent experiments find the signal of giant nonlocal resistance in H-shaped graphene samples due to the spin/valley Hall effect. Interestingly, when the Fermi energy devia…