2020
DOI: 10.48550/arxiv.2002.05203
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The attractive Hubbard model as an $SO(3)$ system of competing phases: supersolid order and its thermal melting

Madhuparna Karmakar,
R. Ganesh

Abstract: Competition between superconductivity and charge order is a recurring theme in contemporary condensed matter physics. This is quintessentially captured in the attractive Hubbard model, a simple theoretical model where the competition can be directly tuned. In previous studies by the current authors, it has been suggested that the Hubbard model maps to an SO(3) non-linear sigma model, where the phase competition becomes manifest. In this article, we rigorously demonstrate this mapping and use it to study therma… Show more

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