333 citations · 389 across the 6 of their papers we have counts for
6 papers
Geometric Floquet Condition for Quantum Adiabaticity
Jie Gu, X. -G. Zhang
Quantum adiabaticity is the evolution of a quantum system that remains close to an instantaneous eigenstate of a time-dependent Hamiltonian. Using Floquet formalism, we derive a ri…
Gap state charge induced spin-dependent negative differential resistance in tunnel junctions
Jun Jiang, X. -G. Zhang, X. F. Han
We propose and demonstrate through first-principles calculation a new spin-dependent negative differential resistance (NDR) mechanism in magnetic tunnel junctions (MTJ) with cubic…
Electron transport in graphene/graphene side-contact junction by plane-wave multiple scattering method
Xiang-Guo Li, Iek-Heng Chu, X. -G. Zhang +1
Electron transport in graphene is along the sheet but junction devices are often made by stacking different sheets together in a "side-contact" geometry which causes the current to…
Spin-dependent resonant tunneling through quantum-well states in magnetic metallic thin films
Zhong-Yi Lu, X. -G. Zhang, Sokrates T. Pantelides
Quantum-well (QW) states in {\it nonmagnetic} metal layers contained in magnetic multilayers are known to be important in spin-dependent transport, but the role of QW states in {\i…
Large magnetoresistance in bcc Co/MgO/Co and FeCo/MgO/FeCo tunneling junctions
X. -G. Zhang, W. H. Butler
By use of first-principles electronic structure calculations, we predict that the magnetoresistance of the bcc Co(100)/MgO(100)/bcc Co(100) and FeCo(100)/MgO(100)/FeCo(100) tunneli…
Spin symmetry and spin current of helicity eigenstates of the Luttinger Hamiltonian
Xindong Wang, X. -G. Zhang
A general spin symmetry argument is proposed for spin currents in semiconductors. In particular, due to the symmetry with respect to spin polarization of the helicity eigenstates o…