Open AccessJournal Article
Full-zone spin-splitting for electrons and holes in bulk GaAs and GaSb
TLDR
In this article, the authors provided a full-zone description of the Dresselhaus splitting in zinc blende semiconductors by using pseudopotentials, empirically corrected to rectify local density approximation errors by fitting $GW$ results.Abstract:
The spin-orbit interaction---a fundamental electroweak force---is equivalent to an effective magnetic field intrinsic to crystals, leading to band spin splitting for certain $k$ points in sufficiently low-symmetry structures. This (Dresselhaus) splitting has usually been calculated at restricted regions in the Brillouin zone via small wave vector approximations (e.g., $\mathbf{k}\ifmmode\cdot\else\textperiodcentered\fi{}\mathbf{p}$), potentially missing the ``big picture.'' We provide a full-zone description of the Dresselhaus splitting in zinc blende semiconductors by using pseudopotentials, empirically corrected to rectify local density approximation errors by fitting $GW$ results. In contrast to what was previous thought, we find that the largest spin splitting in the lowest conduction band and upper valence band (VB1) occurs surprisingly along the (210) direction, not the (110) direction, and that the splitting of the VB1 is comparable to that of the next two valence bands VB2 and VB3.read more
Citations
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Electronic structure of a single MoS2 monolayer
TL;DR: In this paper, the electronic structure of a single MoS2 monolayer is investigated with all electron first-principles calculations based on Kohn Sham Density Functional Theory and variational treatment of spin-orbital coupling.
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Hidden spin polarization in inversion-symmetric bulk crystals
Xiuwen Zhang,Xiuwen Zhang,Xiuwen Zhang,Qihang Liu,Qihang Liu,Jun-Wei Luo,Arthur J Freeman,Alex Zunger +7 more
TL;DR: In this paper, it was shown that spin polarization due to spin-orbit coupling requires broken inversion symmetry, rather than global space-group asymmetry, and that a hitherto overlooked form of spin polarization should also exist in centrosymmetric structures.
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Spin dynamics in semiconductors
TL;DR: In this paper, the current status of spin dynamics in semiconductors is reviewed, which has achieved a lot of progress in the past years due to the fast growing field of semiconductor spintronics.
Journal Article
Hidden spin polarization in inversion-symmetric bulk crystals
TL;DR: In this paper, it was shown that spin polarization due to spin-orbit coupling requires broken inversion symmetry, rather than global space-group asymmetry, and that a hitherto overlooked form of spin polarization should also exist in centrosymmetric structures.
Journal ArticleDOI
Spin splitting in 2D monochalcogenide semiconductors
TL;DR: The electron- and hole-spin relaxation times in these systems with zero or minimal spin splittings are expected to exceed those in GaAs when the D’yakonov-Perel’ spin relaxation mechanism is also suppressed.
References
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Journal ArticleDOI
Electronic structure of a single MoS2 monolayer
TL;DR: In this paper, the electronic structure of a single MoS2 monolayer is investigated with all electron first-principles calculations based on Kohn Sham Density Functional Theory and variational treatment of spin-orbital coupling.
Journal ArticleDOI
Spin dynamics in semiconductors
TL;DR: In this paper, the current status of spin dynamics in semiconductors is reviewed, which has achieved a lot of progress in the past years due to the fast growing field of semiconductor spintronics.
Journal Article
Hidden spin polarization in inversion-symmetric bulk crystals
TL;DR: In this paper, it was shown that spin polarization due to spin-orbit coupling requires broken inversion symmetry, rather than global space-group asymmetry, and that a hitherto overlooked form of spin polarization should also exist in centrosymmetric structures.
Journal ArticleDOI
Spin splitting in 2D monochalcogenide semiconductors
TL;DR: The electron- and hole-spin relaxation times in these systems with zero or minimal spin splittings are expected to exceed those in GaAs when the D’yakonov-Perel’ spin relaxation mechanism is also suppressed.