Intrinsic spin currents in bulk noncentrosymmetric ferromagnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00600190" target="_blank" >RIV/68081723:_____/24:00600190 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1293255824002929?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1293255824002929?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.solidstatesciences.2024.107727" target="_blank" >10.1016/j.solidstatesciences.2024.107727</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Intrinsic spin currents in bulk noncentrosymmetric ferromagnets

Popis výsledku v původním jazyce

Intrinsic spin currents are encountered in noncentrosymmetric crystals without any external electric fields, these currents are caused by spin–orbit interaction. In this paper, various theoretical aspects of this phenomenon in bulk ferromagnets are studied by using group theory, perturbation expansion, and calculations for model and real systems. The group-theoretical analysis of the spin-current tensor shows that the absence of space-inversion symmetry is not a sufficient condition for appearance of the intrinsic spin currents. The perturbation expansion proves that in the regime of exchange splitting dominating over spin–orbit interaction, the spin polarization of the intrinsic currents is nearly perpendicular to the direction of magnetization. First-principles calculations are carried out for NiMnSb and CoMnFeSi ferromagnetic compounds, both featured by a tetrahedral crystallographic point group. The dependence of the spin-current tensor on the direction of magnetization is approximated by a simple quadratic formula containing two constants, the relative error of this approximation is found as small as a few percent for both compounds.

Název v anglickém jazyce

Intrinsic spin currents in bulk noncentrosymmetric ferromagnets

Popis výsledku anglicky

Intrinsic spin currents are encountered in noncentrosymmetric crystals without any external electric fields, these currents are caused by spin–orbit interaction. In this paper, various theoretical aspects of this phenomenon in bulk ferromagnets are studied by using group theory, perturbation expansion, and calculations for model and real systems. The group-theoretical analysis of the spin-current tensor shows that the absence of space-inversion symmetry is not a sufficient condition for appearance of the intrinsic spin currents. The perturbation expansion proves that in the regime of exchange splitting dominating over spin–orbit interaction, the spin polarization of the intrinsic currents is nearly perpendicular to the direction of magnetization. First-principles calculations are carried out for NiMnSb and CoMnFeSi ferromagnetic compounds, both featured by a tetrahedral crystallographic point group. The dependence of the spin-current tensor on the direction of magnetization is approximated by a simple quadratic formula containing two constants, the relative error of this approximation is found as small as a few percent for both compounds.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA23-04746S" target="_blank" >GA23-04746S: Teorie magnetických systémů v elektrických a elektromagnetických polích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Solid State Sciences

ISSN

1293-2558

e-ISSN

1873-3085

Svazek periodika

158

Číslo periodika v rámci svazku

DEC

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

107727

Kód UT WoS článku

001350362000001

EID výsledku v databázi Scopus

2-s2.0-85207691319