Stability and absence of a tower of states in ferrimagnets
Stability and absence of a tower of states in ferrimagnets
复制标题
亚铁磁体中状态塔的稳定性和不存在
DOI:
10.1103/physrevresearch.2.013304
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发表时间:
2020
影响因子:
4.2
通讯作者:
A.J. Beekman and J. van Wezel
中科院分区:
文献类型:
--
作者:
L. Rademaker;A.J. Beekman and J. van Wezel
Antiferromagnets and ferromagnets are archetypes of the two distinct (type-A and type-B) ways of spontaneously breaking a continuous symmetry. Although type-B Nambu-Goldstone modes arise in various systems, the ferromagnet was considered pathological due to the stability and symmetry-breaking nature of its exact ground state. However, here we show that symmetry breaking in ferrimagnets closely resembles the ferromagnet. In particular, there is an extensive ground-state degeneracy, there is no Anderson tower of states, and the maximally polarized ground state is thermodynamically stable. Our results are derived analytically for the Lieb-Mattis ferrimagnet and numerically for the Heisenberg ferrimagnet. We argue that these properties are generic for type-B symmetry-broken systems, where the order parameter operator is a symmetry generator.
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DOI:
10.1016/j.aop.2015.07.008
发表时间:
2014
期刊:
arXiv: Other Condensed Matter
影响因子:
--
作者:
A. Beekman
通讯作者:
A. Beekman
影响因子:
8.6
作者:
Azaria;Delamotte;Mouhanna
通讯作者:
Mouhanna
影响因子:
1.7
作者:
Shoji Yamamoto;T. Sakai
通讯作者:
T. Sakai
影响因子:
4.2
作者:
L. Rademaker
通讯作者:
L. Rademaker
DOI:
10.1103/physrevb.42.4663
发表时间:
1990
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
T. A. Kaplan;W. V. D. Linden;P. Horsch
通讯作者:
P. Horsch