期刊
PHYSICAL REVIEW B
卷 90, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.174413
关键词
-
资金
- division II of the Swiss National Science Foundation
The properties of two quantum spin chain materials, K2CuSO4Cl2 and K2CuSO4Br2, are studied by a variety of experimental techniques, including bulk measurements, neutron spectroscopy, and electron spin resonance. The hierarchy of relevant terms in the magnetic Hamiltonian is established. It is shown that these two compounds feature substantial Dzyaloshinskii-Moriya interactions that are uniform within each chain, but antiparallel in adjacent chains. The result is a peculiar type of frustration of interchain interactions, which leads to an unusual field-temperature phase diagram.
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