Vestigial nematic order at zero temperature in two-dimensional frustrated quantum antiferromagnets
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直接研究二维受挫量子反铁磁体中的零温量子向列相，使用大N分析讨论量子涨落、竞争相互作用与磁有序消失。
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Author(s): Matthew C. O'Brien and Eduardo Fradkin Recent numerical advances have renewed interest in the two-dimensional quantum J 1 - J 3 Heisenberg antiferromagnet, but a detailed analytical theory has remained lacking. Here, the authors apply a semiclassical effective field theory and large- N analysis. They show that previously overlooked interactions stabilize a quantum vestigial nematic phase at zero temperature, where discrete rotational symmetry is spontaneously broken despite the loss of long-range antiferromagnetic spiral order. This phase continues the known finite-temperature nematic phase, reflecting enhanced quantum fluctuations near the classical Lifshitz point. [Phys. Rev. B 114, 134414] Published Thu Sep 10, 2026