Strain-induced phase transition from antiferromagnet to altermagnet

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00605214" target="_blank" >RIV/68378271:_____/24:00605214 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.109.144421" target="_blank" >https://doi.org/10.1103/PhysRevB.109.144421</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.109.144421" target="_blank" >10.1103/PhysRevB.109.144421</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strain-induced phase transition from antiferromagnet to altermagnet

Popis výsledku v původním jazyce

The newly discovered altermagnets are unconventional collinear compensated magnetic systems, exhibiting even (d, g, or i wave) spin-polarization order in the band structure, setting them apart from conventional collinear ferromagnets and antiferromagnets. Altermagnets offer advantages of spin-polarized current akin to ferromagnets, and THz functionalities similar to antiferromagnets, while introducing new effects like spinsplitter currents. A key challenge for future applications and functionalization of altermagnets is to demonstrate controlled transitioning to the altermagnetic phase from other conventional phases in a single material. Here we prove a viable path toward overcoming this challenge through a strain-induced transition from an antiferromagnetic to an altermagnetic phase in ReO2. Combining spin group symmetry analysis and ab initio calculations, we demonstrate that under compressive strain ReO2 undergoes such transition, lifting the Kramers degeneracy of the band structure of the antiferromagnetic phase in the nonrelativistic regime. In addition, we show that this magnetic transition is accompanied by a metal-insulator transition, and calculate the distinct spin-polarized spectral functions of the two phases, which can be detected in angle-resolved photoemission spectroscopy experiments.

Název v anglickém jazyce

Strain-induced phase transition from antiferromagnet to altermagnet

Popis výsledku anglicky

The newly discovered altermagnets are unconventional collinear compensated magnetic systems, exhibiting even (d, g, or i wave) spin-polarization order in the band structure, setting them apart from conventional collinear ferromagnets and antiferromagnets. Altermagnets offer advantages of spin-polarized current akin to ferromagnets, and THz functionalities similar to antiferromagnets, while introducing new effects like spinsplitter currents. A key challenge for future applications and functionalization of altermagnets is to demonstrate controlled transitioning to the altermagnetic phase from other conventional phases in a single material. Here we prove a viable path toward overcoming this challenge through a strain-induced transition from an antiferromagnetic to an altermagnetic phase in ReO2. Combining spin group symmetry analysis and ab initio calculations, we demonstrate that under compressive strain ReO2 undergoes such transition, lifting the Kramers degeneracy of the band structure of the antiferromagnetic phase in the nonrelativistic regime. In addition, we show that this magnetic transition is accompanied by a metal-insulator transition, and calculate the distinct spin-polarized spectral functions of the two phases, which can be detected in angle-resolved photoemission spectroscopy experiments.

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/GX19-28375X" target="_blank" >GX19-28375X: Terahertzové a neuromorfní paměti založené na antiferomagnetech</a><br>

Návaznosti

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

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

109

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

144421

Kód UT WoS článku

001250622300002

EID výsledku v databázi Scopus

2-s2.0-85191308998