Manipulation of the spin-orbit coupling using the Dirac equation for spin-dependent potentials

Ebert, H.; Freyer, H.; Vernes, A.; Guo, Guang‐Yu

doi:10.1103/physrevb.53.7721

Cited by 68 publications

(45 citation statements)

References 35 publications

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“…For the latter case, which would correspond to a scalar-relativistic calculation, the Fermi energy has not been recalculated, the effect of SOC on the center of gravity of the electronic bands being negligibly small. 15 As expected, the most evident feature that can be seen in this figure is the lifting of degeneracy in the valence band ͑VB͒ due to inclusion of SOC. This is a direct consequence of the fact that the top of this band has dominantly As p character, while the bottom of the conduction band ͑CB͒, where no differences between the two types of calculation can be noticed, has mainly Ga s character.…”

Section: Spin-orbit Coupling Effect On the Electronic Structure Ofmentioning

confidence: 48%

“…͑15͒, is by no means restricted to the particular values x =0 or x = 1 used so far, but allows one to gradually scale up or down the spin-orbit interaction strength. Applying their scheme to transition-metal elements, Ebert et al 15 found a linear dependence of the orbital magnetic moments as well as for the Kerr rotation spectra on the scaling parameter x. We discuss in the following the dependence of the conductance on the SOC strength.…”

Section: Spin-orbit Coupling Manipulation Inside the Gaas Barriermentioning

confidence: 99%

“…One has to note here that this transformation has been done by rewriting the set of coupled radial Dirac equations. 15 In this way, although still working in the relativistic ⌳ representation, the minor component becomes meaningless, and the ansatz…”

Section: Spin-orbit Coupling Manipulationmentioning

confidence: 99%

“…15 This approach allows one to gradually switch the spin-orbit interaction strength without leaving the relativistic representation. For the sake of reference, we review in the following derivation of the basic formulas.…”

Section: Spin-orbit Coupling Manipulationmentioning

confidence: 99%

“…For this purpose, we perform model calculations in which the strength of the spin-orbit interaction is manipulated according to a scheme suggested some years ago, 15 ignoring, however, any influences related to imperfections in the metal-semiconductor interface. In turn, the changes in the electronic structure of the semiconducting spacer induced by spin-orbit coupling and thus its role in assisting the tunneling through the barrier is investigated in some detail.…”

Section: Introductionmentioning

confidence: 99%

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Influence of spin-orbit coupling on the transport properties of magnetic tunnel junctions

Popescu¹,

Ebert²,

Papanikolaou³

et al. 2005

Phys. Rev. B

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Using a fully relativistic implementation of the Landauer-Büttiker formalism, the ballistic conductance and magnetoresistance in the Fe/ GaAs/ Fe tunnel junction has been calculated. The underlying electronic structure of the system was obtained using a spin-polarized relativistic version of the screened Korringa-Kohn-Rostoker Green-function method. To analyze the influence of spin-orbit coupling induced spin-flip processes on the spin-dependent transport, a scheme introduced recently by us which allows one to split the relativistic conductance in terms of individual spin-diagonal and spin off-diagonal ͑spin-flip͒ components has been applied. Our previous investigations showed that a strong spin-flip channel is present in the conductance, having the most important influence for an antiparallel alignment of the magnetization in the two Fe leads. Motivated by these findings and based on model calculations in which the strength of the spin-orbit interaction has been manipulated we present a detailed analysis of the various features induced by the spin-orbit coupling inside the barrier, and how these modify the tunneling. We found that even in the ideal case of a specular interface the magnetoresistance can significantly drop if the spacer is characterized by a strong spin-orbit coupling.

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Section: Spin-orbit Coupling Effect On the Electronic Structure Ofmentioning

confidence: 48%

Section: Spin-orbit Coupling Manipulation Inside the Gaas Barriermentioning

confidence: 99%

Section: Spin-orbit Coupling Manipulationmentioning

confidence: 99%

Section: Spin-orbit Coupling Manipulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of spin-orbit coupling on the transport properties of magnetic tunnel junctions

Popescu¹,

Ebert²,

Papanikolaou³

et al. 2005

Phys. Rev. B

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Magnetic Spectroscopy

Ebert¹

2007

Handbook of Magnetism and Advanced Magnetic Materials

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Electron spectroscopic methods are indispensable tools to study magnetic solids, as they can be used to monitor their magnetization in a spatial time‐resolved way and partly in an element‐resolved way, as well as to probe their electronic structure in a most detailed way. This contribution gives an overview on three representative and important techniques widely used for these purposes: magneto‐optics, X‐ray absorption, and photoemission spectroscopy. The theoretical basis for dealing with these spectroscopies is presented putting some emphasis on the consequences of spin‐orbit coupling, as this relativistic effect often plays a central role. After introducing the main concepts for each type of spectroscopy, some illustrative examples are presented.

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Quantum electrodynamical density‐matrix functional theory and group theoretical consideration of its solution

Ohsaku

Yamanaka

Yamaki

et al. 2002

Int J of Quantum Chemistry

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ABSTRACT:For studying the group theoretical classification of the solutions of the density functional theory in relativistic framework, we propose quantum electrodynamical density-matrix functional theory (QED-DMFT). QED-DMFT gives the energy as a functional of a local one-body 4 × 4 matrix Q(x) ≡ − ψ(x)ψ(x) , where ψ andψ are a 4-component Dirac field and its Dirac conjugate, respectively. We examine some characters of QED-DMFT. After these preparations, by using Q(x), we classify the solutions of QED-DMFT under O(3) rotation, time reversal, and spatial inversion. The behavior of Q(x) under nonrelativistic and ultrarelativistic limits is also presented. Finally, we give plans for several extensions and applications of QED-DMFT.

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Manipulation of the spin-orbit coupling using the Dirac equation for spin-dependent potentials

Cited by 68 publications

References 35 publications

Influence of spin-orbit coupling on the transport properties of magnetic tunnel junctions

Influence of spin-orbit coupling on the transport properties of magnetic tunnel junctions

Magnetic Spectroscopy

Quantum electrodynamical density‐matrix functional theory and group theoretical consideration of its solution

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