期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.177203
关键词
-
资金
- DFG [FOR 960, GRK 1621]
For isolated vacancies in ordered local-moment antiferromagnets we show that the magnetic-field linear-response limit is generically singular: The magnetic moment associated with a vacancy in zero field is different from that in a finite field h in the limit h -> 0(+). The origin is a universal and singular screening cloud, which moreover leads to perfect screening as h -> 0(+) for magnets which display spin-flop bulk states in the weak-field limit.
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