Emergent $\mathbb{Z}_2$ symmetry near a CDW multicritical point
In: Phys. Rev. B 108, 205141 (2023); (2023)
Online
report
We consider the critical behavior associated with incommensurate unidirectional charge-density-wave ordering in a weakly orthorhombic system subject to uniaxial strain as an experimentally significant example of $U(1)\times U(1)$ multicriticality. We show that, depending on microscopic details, the phase diagram can have qualitatively different structures which can involve a vestigial meta-nematic critical point, a pair of tricritical points, a decoupled tetracritical point, or (at least at mean-field level) a bicritical point. We analyze the emergent symmetries in the critical regime and find that these can -- at least in some cases -- involve an emergent $\mathbb{Z}_2$ order parameter symmetry.
Comment: 7 pages, 2 figures
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Emergent $\mathbb{Z}_2$ symmetry near a CDW multicritical point
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Autor/in / Beteiligte Person: | Kivelson, Steven A. ; Pandey, Akshat ; Singh, Anisha G. ; Kapitulnik, Aharon ; Fisher, Ian R. |
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Quelle: | Phys. Rev. B 108, 205141 (2023); (2023) |
Veröffentlichung: | 2023 |
Medientyp: | report |
DOI: | 10.1103/PhysRevB.108.205141 |
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