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Aug 17, 2020 at 3:55 comment added user167506 @RubenVerresen you are totally correct, there is no reason a QSL material could not also host non-magnetic long-range order. I think despite the lack of specificity in the statement (1), OP is interested in the presence or absence of magnetic LRO.
Aug 16, 2020 at 3:37 comment added mr.no @Ruben Verresen Sure you can construct such states. But naively I think this kind of state can not be low energy states of a physically relevant Hamiltonian (especially short-range interacting models). Moreover, my question is more about whether the QSL itself can have long-range order rather than a QSL weakly coupled with a different symmetry breaking state.
Aug 15, 2020 at 16:41 comment added Ruben Verresen As a trivial counter-example, consider a two-layer stack of a QSL and a symmetry-breaking phase of matter. Even if one couples the two (without driving a quantum phase transition), all three properties you mention will be robust.
Aug 15, 2020 at 4:46 answer added user167506 timeline score: 2
Aug 15, 2020 at 3:36 history asked mr.no CC BY-SA 4.0