Temperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transition

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152462" target="_blank" >RIV/00216305:26620/24:PU152462 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00588400 RIV/00216224:14310/24:00137714 RIV/49777513:23640/24:43972941

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/10.1002/adma.202314076" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adma.202314076</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adma.202314076" target="_blank" >10.1002/adma.202314076</a>

Result language

angličtina

Original language name

Temperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transition

Original language description

Altermagnetic (AM) materials exhibit non-relativistic, momentum-dependent spin-split states, ushering in new opportunities for spin electronic devices. While the characteristics of spin-splitting are documented within the framework of the non-relativistic spin group symmetry, there is limited exploration of the inclusion of relativistic symmetry and its impact on the emergence of a novel spin-splitting in the band structure. This study delves into the intricate relativistic electronic structure of an AM material, alpha-MnTe. Employing temperature-dependent angle-resolved photoelectron spectroscopy across the AM phase transition, the emergence of a relativistic valence band splitting concurrent with the establishment of magnetic order is elucidated. This discovery is validated through disordered local moment calculations, modeling the influence of magnetic order on the electronic structure and confirming the magnetic origin of the observed splitting. The temperature-dependent splitting is ascribed to the advent of relativistic spin-splitting resulting from the strengthening of AM order in alpha-MnTe as the temperature decreases. This sheds light on a previously unexplored facet of this intriguing material. Altermagnets exhibit momentum-dependent spin-split states providing new opportunities for spin electronic devices. Through temperature-dependent angle-resolved photoemission spectroscopy and disordered local moment calculations, it is demonstrated that the relativistic valence band splitting of the prototypical MnTe altermagnet is of magnetic origin. This is attributed to a novel relativistic spin-splitting phenomenon concurrent with the establishment of the altermagnetic order below the N & eacute;el temperature. image

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

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

Name of the periodical

ADVANCED MATERIALS

ISSN

0935-9648

e-ISSN

1521-4095

Volume of the periodical

36

Issue of the periodical within the volume

31

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

„“-„“

UT code for WoS article

001234197900001

EID of the result in the Scopus database

2-s2.0-85194697097