scholarly journals Giant Magnetoresistance Calculated from First Principles

1993 ◽  
Vol 313 ◽  
Author(s):  
W. H. Butler ◽  
James M. MacLaren ◽  
X.-G. Zhang
Keyword(s):  
Low Temperature ◽  
First Principles ◽  
Giant Magnetoresistance ◽  
Coherent Potential Approximation ◽  
Orbit Coupling ◽  
Approximation Technique ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Potential Approximation ◽  
Magnetoresis Tance

ABSTRACTThe Layer Korringa Kohn Rostoker-Coherent Potential Approximation technique was used to calculate the low temperature Giant Magnetoresistance from first principles for Co|Cu and permalloy|Cu superlattices. Our calculations predict large giant Magnetoresis-tance ratios for Co|Cu and extremely large ratios for permalloy|Cu for current perpendicular to the layers. Mechanisms such as spin-orbit coupling which mix spin channels are expected to greatly reduce the GMR effect for permalloy|Cu.

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.

scholarly journals The role of spin–orbit effects in the mobility of N+ ions moving in a helium gas at low temperature

2020 ◽  
Vol 74 (7) ◽  
Author(s):  
Lamia Aïssaoui ◽  
Peter J. Knowles ◽  
Moncef Bouledroua
Keyword(s):  
Low Temperature ◽  
Cross Sections ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Temperature Model ◽  
Helium Gas ◽  
Spin Orbit Interactions ◽  
High Level

Abstract The mobility of N+ ions in ground-state helium gas at very low temperature is examined with explicit inclusion of spin–orbit coupling effects. The ionic kinetics is treated theoretically with the three-temperature model. The N+–He interaction potentials, including spin–orbit coupling, are determined using high-level ab initio calculations. Then, the classical and quantal transport cross sections, both needed in the computation of the mobility coefficients, are calculated in terms of the collisional energy of the N+–He system. The numerical results, at temperature 4.3 K, show the spin–orbit interactions have negligible effect on the mobility coefficients. Graphical abstract

First-principles investigations on the Berry phase effect in spin–orbit coupling materials

2016 ◽  
Vol 112 ◽  
pp. 428-447 ◽  
Author(s):  
Wanxiang Feng ◽  
Cheng-Cheng Liu ◽  
Gui-Bin Liu ◽  
Jin-Jian Zhou ◽  
Yugui Yao
Keyword(s):  
First Principles ◽  
Berry Phase ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Phase Effect

scholarly journals Band-structure topologies of graphene: Spin-orbit coupling effects from first principles

2009 ◽  
Vol 80 (23) ◽  
Author(s):  
M. Gmitra ◽  
S. Konschuh ◽  
C. Ertler ◽  
C. Ambrosch-Draxl ◽  
J. Fabian
Keyword(s):  
Band Structure ◽  
First Principles ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Effects
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