Spin and pair density waves in two-dimensional altermagnetic metals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00643365" target="_blank" >RIV/68378271:_____/25:00643365 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0377026" target="_blank" >https://hdl.handle.net/11104/0377026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/llrq-1k9k" target="_blank" >10.1103/llrq-1k9k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spin and pair density waves in two-dimensional altermagnetic metals

Popis výsledku v původním jazyce

Altermagnetism, a recently proposed and experimentally confirmed class of magnetic order, features collinear compensated magnetism with unconventional spin-split bands. Here, we show that in a metallic 2D d-wave altermagnet with [C2||C4] symmetry, secondary instabilities can arise. Using an unbiased functional renormal ization group approach, we analyze the weak-coupling instabilities of a 2D Hubbard model with a preexisting altermagnetic order inspired by our ab initio electronic structure calculations of realistic material candidates from V2X2 O(X = Te, Se) family. We identify two distinct spin-density-wave (SDW) states that break the underlying altermagnetic [C2||C4] symmetry. Additionally, we find spin-fluctuation-induced instabilities leading to a singlet d-wave superconducting state and an unconventional commensurate pair-density-wave (PDW) state with extended s-wave and spin-triplet symmetry. We analyze the pairing mechanism and characterize the excitation spectrum, which exhibits Bogoliubov Fermi surfaces or nodal points depending on the gap size.

Název v anglickém jazyce

Spin and pair density waves in two-dimensional altermagnetic metals

Popis výsledku anglicky

Altermagnetism, a recently proposed and experimentally confirmed class of magnetic order, features collinear compensated magnetism with unconventional spin-split bands. Here, we show that in a metallic 2D d-wave altermagnet with [C2||C4] symmetry, secondary instabilities can arise. Using an unbiased functional renormal ization group approach, we analyze the weak-coupling instabilities of a 2D Hubbard model with a preexisting altermagnetic order inspired by our ab initio electronic structure calculations of realistic material candidates from V2X2 O(X = Te, Se) family. We identify two distinct spin-density-wave (SDW) states that break the underlying altermagnetic [C2||C4] symmetry. Additionally, we find spin-fluctuation-induced instabilities leading to a singlet d-wave superconducting state and an unconventional commensurate pair-density-wave (PDW) state with extended s-wave and spin-triplet symmetry. We analyze the pairing mechanism and characterize the excitation spectrum, which exhibits Bogoliubov Fermi surfaces or nodal points depending on the gap size.

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

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

112

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

214410

Kód UT WoS článku

001633684700004

EID výsledku v databázi Scopus

2-s2.0-105026659316