scholarly journals Drude weight and optical conductivity of a two-dimensional heavy-hole gas withk-cubic spin-orbit interactions

2016 ◽  
Vol 119 (4) ◽  
pp. 044303 ◽  
Author(s):  
Alestin Mawrie ◽  
Tarun Kanti Ghosh
Keyword(s):  
Optical Conductivity ◽  
Heavy Hole ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Drude Weight ◽  
Spin Orbit Interactions

scholarly journals Landau quantization, Rashba spin-orbit coupling and Zeeman splitting of two-dimensional heavy-hole gases

2014 ◽  
Vol 252 (4) ◽  
pp. 730-742 ◽  
Author(s):  
S. A. Moskalenko ◽  
I. V. Podlesny ◽  
E. V. Dumanov ◽  
M. A. Liberman ◽  
B. V. Novikov
Keyword(s):  
Heavy Hole ◽  
Zeeman Splitting ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Rashba Spin

scholarly journals Novel Plasmonic Modes of Monolayer MoS$_2$ in the Presence of Spin-Orbit Interactions

2018 ◽  
Author(s):  
Z.H. Tao ◽  
H.M. Dong ◽  
Y.F. Duan ◽  
F. Huang
Keyword(s):  
Random Phase Approximation ◽  
Theoretical Study ◽  
Random Phase ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Monolayer Mos2 ◽  
Spin Polarizability ◽  
Terahertz Devices ◽  
Spin Orbit Interactions ◽  
Plasmon Modes

We investigate on the plasmons of monolayer MoS2 in the presence of spin-orbit interactions (SOIs) under the random phase approximation. The theoretical study shows that two new and novel plasmonic modes can be achieved via inter spin sub-band transitions around the Fermi level duo to the SOIs. The plasmon modes are optic-like, which are very different from the plasmon modes reported recently in monolayer MoS2, and the other two-dimensional systems. The frequency of such plasmons increases with the increasing of the electron density or the spin polarizability, and decreases with the increasing of the wave vectors q. Our results exhibit some interesting features which can be utilized to the plasmonic and terahertz devices based on monolayer MoS2.

OPTICAL CONDUCTIVITY OF TWO-DIMENSIONAL LATTICE

2008 ◽  
Vol 22 (06) ◽  
pp. 435-445 ◽  
Author(s):  
LEI XU ◽  
JUN ZHANG
Keyword(s):  
Optical Conductivity ◽  
Tight Binding ◽  
Two Dimensional ◽  
Energy Bands ◽  
Electron Model ◽  
Dimensional Lattice ◽  
Flux Parameter ◽  
Drude Weight ◽  
The Mean ◽  
Mean Kinetic Energy

We investigate the optical conductivity in the two-dimensional (2D) square and triangular tight-binding lattice-electron model with staggered magnetic flux (SMF). The SMF results in a two-sublattice system with two branches of energy bands in both cases, and even generates new flux-dependent optical properties. Results for the flux parameter dependence of the mean kinetic energy, the Drude weight and the optical conductivity are discussed in detail. A comparison between the two cases has been done.

scholarly journals Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer

2020 ◽  
Vol 6 (15) ◽  
pp. eaay0114 ◽  
Author(s):  
Zhangzhang Cui ◽  
Alexander J. Grutter ◽  
Hua Zhou ◽  
Hui Cao ◽  
Yongqi Dong ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Uniaxial Anisotropy ◽  
Spin Reorientation ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Orbital Ordering ◽  
Magnetic Easy Axis ◽  
Spin Orbit Interactions ◽  
Spin Switching

Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180° spin switching between states. We demonstrate a previously unobserved eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(SrTiO3)N superlattices, in which the magnetic easy axis of Ru spins is transformed from uniaxial 〈001〉 direction (N < 3) to eightfold 〈111〉 directions (N ≥ 3). This eightfold anisotropy enables 71° and 109° spin switching in SrRuO3 monolayers, analogous to 71° and 109° polarization switching in ferroelectric BiFeO3. First-principle calculations reveal that increasing the SrTiO3 layer thickness induces an emergent correlation-driven orbital ordering, tuning spin-orbit interactions and reorienting the SrRuO3 monolayer easy axis. Our work demonstrates that correlation effects can be exploited to substantially change spin-orbit interactions, stabilizing unprecedented properties in two-dimensional magnets and opening rich opportunities for low-power, multistate device applications.

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