BROWSE

Related Scientist

CCES's photo.

CCES
강상관계 물질 연구단
more info

ITEM VIEW & DOWNLOAD

Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2

Cited 0 time in webofscience Cited 0 time in scopus
12 Viewed 0 Downloaded
Title
Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2
Author(s)
Pyeongjae Park; Kisoo Park; Taehun Kim; Yusuke Kousaka; Ki Hoon Lee; T. G. Perring; Jaehong Jeong; Uwe Stuhr; Jun Akimitsu; Michel Kenzelmann; Je-Geun Park
Subject
MAGNETIC-STRUCTURE, ; EXCITATIONS
Publication Date
2020-07
Journal
PHYSICAL REVIEW LETTERS, v.125, no.2, pp.027202
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 American Physical Society. Noncollinear magnetic order arises for various reasons in several magnetic systems and exhibits interesting spin dynamics. Despite its ubiquitous presence, little is known of how magnons, otherwise stable quasiparticles, decay in these systems, particularly in metallic magnets. Using inelastic neutron scattering, we examine the magnetic excitation spectra in a metallic noncollinear antiferromagnet CrB2, in which Cr atoms form a triangular lattice and display incommensurate magnetic order. Our data show intrinsic magnon damping and continuumlike excitations that cannot be explained by linear spin wave theory. The intrinsic magnon linewidth Γ(q,Eq) shows very unusual momentum dependence, which our analysis shows to originate from the combination of two-magnon decay and the Stoner continuum. By comparing the theoretical predictions with the experiments, we identify where in the momentum and energy space one of the two factors becomes more dominant. Our work constitutes a rare comprehensive study of the spin dynamics in metallic noncollinear antiferromagnets. It reveals, for the first time, definite experimental evidence of the higher-order effects in metallic antiferromagnets
URI
https://pr.ibs.re.kr/handle/8788114/7778
DOI
10.1103/PhysRevLett.125.027202
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse