Spin Density Wave versus Fractional Magnetization Plateau in a Triangular Antiferromagnet.
Phys Rev Lett
; 129(8): 087201, 2022 Aug 19.
Article
em En
| MEDLINE
| ID: mdl-36053701
ABSTRACT
We report an excellent realization of the highly nonclassical incommensurate spin-density wave (SDW) state in the quantum frustrated antiferromagnetic insulator Cs_{2}CoBr_{4}. In contrast to the well-known Ising spin chain case, here the SDW is stabilized by virtue of competing planar in-chain anisotropies and frustrated interchain exchange. Adjacent to the SDW phase is a broad m=1/3 magnetization plateau that can be seen as a commensurate locking of the SDW state into the up-up-down (UUD) spin structure. This represents the first example of the long-sought SDW-UUD transition in triangular-type quantum magnets.
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MEDLINE
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Phys Rev Lett
Ano de publicação:
2022
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Article