Non-equilibrium study of spin wave interference in systems with both Rashba and Dresselhaus (001) spin-orbit coupling

2014 ◽  
Vol 115 (17) ◽  
pp. 17C305
Author(s):  
Kuo-Chin Chen ◽  
Yu-Hsin Su ◽  
Son-Hsien Chen ◽  
Ching-Ray Chang
Keyword(s):  
Spin Wave ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Equilibrium Study ◽  
Wave Interference ◽  
Non Equilibrium

scholarly journals Spin-orbit coupling induced magnetic anisotropy and large spin wave gap in NaOsO3

2018 ◽  
Vol 2 (11) ◽  
pp. 115016 ◽  
Author(s):  
Avinash Singh ◽  
Shubhajyoti Mohapatra ◽  
Churna Bhandari ◽  
Sashi Satpathy
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Wave ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Induced Magnetic Anisotropy ◽  
Spin Wave Gap ◽  
Large Spin

scholarly journals Spin-orbit coupling and spin waves in ultrathin ferromagnets: The spin-wave Rashba effect

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
A. T. Costa ◽  
R. B. Muniz ◽  
S. Lounis ◽  
A. B. Klautau ◽  
D. L. Mills
Keyword(s):  
Spin Wave ◽  
Spin Waves ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Effect

scholarly journals Observation of chiral surface excitons in a topological insulator Bi2Se3

2019 ◽  
Vol 116 (10) ◽  
pp. 4006-4011 ◽  
Author(s):  
H.-H. Kung ◽  
A. P. Goyal ◽  
D. L. Maslov ◽  
X. Wang ◽  
A. Lee ◽  
...  
Keyword(s):  
Polarized Light ◽  
Orbit Coupling ◽  
Experimental Investigations ◽  
Composite Particles ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Excitation Energies ◽  
Circularly Polarized Light ◽  
Pl Emission ◽  
Strong Spin

The protected electron states at the boundaries or on the surfaces of topological insulators (TIs) have been the subject of intense theoretical and experimental investigations. Such states are enforced by very strong spin–orbit interaction in solids composed of heavy elements. Here, we study the composite particles—chiral excitons—formed by the Coulomb attraction between electrons and holes residing on the surface of an archetypical 3D TI,Bi2Se3. Photoluminescence (PL) emission arising due to recombination of excitons in conventional semiconductors is usually unpolarized because of scattering by phonons and other degrees of freedom during exciton thermalization. On the contrary, we observe almost perfectly polarization-preserving PL emission from chiral excitons. We demonstrate that the chiral excitons can be optically oriented with circularly polarized light in a broad range of excitation energies, even when the latter deviate from the (apparent) optical band gap by hundreds of millielectronvolts, and that the orientation remains preserved even at room temperature. Based on the dependences of the PL spectra on the energy and polarization of incident photons, we propose that chiral excitons are made from massive holes and massless (Dirac) electrons, both with chiral spin textures enforced by strong spin–orbit coupling. A theoretical model based on this proposal describes quantitatively the experimental observations. The optical orientation of composite particles, the chiral excitons, emerges as a general result of strong spin–orbit coupling in a 2D electron system. Our findings can potentially expand applications of TIs in photonics and optoelectronics.

Spin–orbit coupling driven novel magnetism in d 5 6H-perovskite iridates Ba3IrTi2O9 and Ba3TiIr2O9

2019 ◽  
Vol 31 (18) ◽  
pp. 185802 ◽  
Author(s):  
Sayantika Bhowal ◽  
Shreemoyee Ganguly ◽  
Indra Dasgupta
Keyword(s):  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit
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