Magnetic effects of non-magnetic impurities in gapped short-range resonating valence bond spin liquids
arxiv(2024)
摘要
We study the effect of a small density n_v of quenched non-magnetic
impurities, i.e. vacancy disorder, in gapped short-range resonating
valence bond (RVB) spin liquid states and valence bond solid (VBS) states of
quantum magnets. We argue that a large class of short-range RVB liquids are
stable at small n_v on the kagome lattice, while the corresponding states on
triangular, square, and honeycomb lattices are unstable at any nonzero n_v
due to the presence of emergent vacancy-induced local moments. In contrast, VBS
states are argued to be generically unstable (independent of lattice geometry)
at nonzero n_v due to such a local-moment instability. Our arguments rely in
part on an analysis of the statistical mechanics of maximally-packed dimer
covers of the diluted lattice, and are fully supported by our computational
results on O(N) symmetric designer Hamiltonians.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要