Investigation of novel crystal structures of Bi–Sb binaries predicted using the minima hopping method

2016 ◽  
Vol 18 (43) ◽  
pp. 29771-29785 ◽  
Author(s):  
Sobhit Singh ◽  
Wilfredo Ibarra-Hernández ◽  
Irais Valencia-Jaime ◽  
Guillermo Avendaño-Franco ◽  
Aldo H. Romero
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Coupling Strength ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Concentration Result

In this work, we investigate how different combinations of the crystal structure and the spin-orbit coupling strength (i.e. Sb-concentration) result in different novel properties of Bi–Sb binaries.

The role of the spin-orbit coupling strength in the MO effects of magnetic insulators

2001 ◽  
Vol 37 (4) ◽  
pp. 2411-2413 ◽  
Author(s):  
You Xu ◽  
Jiehui Yang ◽  
Xijuan Zhang ◽  
Fang Zhang ◽  
M. Guillot
Keyword(s):  
Coupling Strength ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Magnetic Insulators

SPIN POLARIZATION AND TUNNELING MAGNETORESISTANCE IN FERROMAGNETIC/SEMICONDUCTOR/FERROMAGNETIC HETEROSTRUCTURE

2008 ◽  
Vol 22 (27) ◽  
pp. 2667-2676 ◽  
Author(s):  
DE LIU ◽  
HONGMEI ZHANG
Keyword(s):  
Spin Polarization ◽  
Coupling Strength ◽  
Channel Length ◽  
Ferromagnetic Semiconductor ◽  
Orbit Coupling ◽  
Tunneling Magnetoresistance ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin ◽  
Left And Right

Based on the coherent quantum transport theory, the spin polarization and tunneling magnetoresistance for polarized electrons through ferromagnetic/semiconductor/ferromagnetic (FM/SM/FM) heterostructure are studied theoretically within the Landauer framework of ballistic transport. The significant quantum size, quantum coherent, angle between the magnetic moments of the left and right ferromagnets, and Rashba spin-orbit interaction are considered simultaneously. The results indicate that the spin polarization and tunneling magnetoresistance are periodic functions of the semiconductor channel length, quasiperiodic functions of the Rashba spin-orbit coupling strength, and depend on the relative orientation of the two magnetizations in the left and right ferromagnets. A moderate angle, semiconductor channel length, and Rashba spin-orbit coupling strength allow a giant spin polarization or tunneling magnetoresistance. The results may be of relevance for the implementation of quasi-one-dimensional spin-transistor devices.

Calculation of the anisotropic magnetoresistance in the electron gas

2015 ◽  
Vol 29 (34) ◽  
pp. 1550230
Author(s):  
J. Azizi
Keyword(s):  
Boltzmann Equation ◽  
Low Temperature ◽  
Electron Scattering ◽  
Coupling Strength ◽  
Electron Gas ◽  
Orbit Coupling ◽  
Anisotropic Magnetoresistance ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Potential Approximation

In this paper, the anisotropic magnetoresistance (AMR) and electron conductivity of electron gas in presence of the Rashba and Dresselhaus spin-orbit coupling are investigated. Boltzmann equation is solved exactly for low temperature, including electron scattering. Calculations have been performed within the coherent potential approximation. Results of the transport study demonstrate that the AMR enhances as the Rashba strength increases. It is also observed that the AMR depends critically on spin-orbit coupling strength, wave vector and Dresselhaus strength.

Characterized helical modulation of three-dimensional Skyrmions in the spin-orbit coupled condensate

2020 ◽  
Vol 34 (19) ◽  
pp. 2050181
Author(s):  
Hao Jiang ◽  
Chong Yu ◽  
Shuwei Song ◽  
Wei Gao ◽  
Weifeng Sun ◽  
...  
Keyword(s):  
Coupling Strength ◽  
Three Dimensional ◽  
Einstein Condensate ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Abelian Gauge ◽  
Lattice State ◽  
Modulation Vector ◽  
Dependent Interaction

For the Bose–Einstein condensate in the non-Abelian gauge field, the atomic wavefunction obtains helical modulation, which would lead to nontrivial objects, such as three-dimensional Skyrmion. The spin–orbit coupled condensate is usually capable of supporting Skyrmion ground states, which can be well understood through the wavefunction modulation vector concept. In the present manuscript, the modulation vector is characterized both analytically and numerically with respect to the spin–orbit coupling strength. For the SU(2) symmetric condensate, the modulation vector of the wavefunction is linearly proportional to the spin–orbit coupling strength. In the presence of spin-dependent interaction, the modulus of the modulation vector is predicted to increase or decrease according to the sign of the interaction parameter, resulting in a shrunken or expanded Skyrmion. However, the Skyrmion is unstable for a certain area of the parameter space of the spin–orbit coupling and spin-dependent interaction. The condensate favors a single Skyrmion state or the Skyrmion lattice state according to the strength of the spin–orbit coupling.

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