Мақола

The Hubbard Model

Daniel P. ArovasDepartment of Physics, University of California, San Diego, La Jolla, California, USAErez BergDepartment of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, IsraelSteven A. KivelsonDepartment of Physics, Stanford University, Stanford, California, USA;S. RaghuDepartment of Physics, Stanford University, Stanford, California, USA;

2021en

ABI

Аннотация

The repulsive Hubbard model has been immensely useful in understanding strongly correlated electron systems and serves as the paradigmatic model of the field. Despite its simplicity, it exhibits a strikingly rich phenomenology reminiscent of that observed in quantum materials. Nevertheless, much of its phase diagram remains controversial. Here, we review a subset of what is known about the Hubbard model based on exact results or controlled approximate solutions in various limits, for which there is a suitable small parameter. Our primary focus is on the ground state properties of the system on various lattices in two spatial dimensions, although both lower and higher dimensions are discussed as well. Finally, we highlight some of the important outstanding open questions.

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Идентификаторлар

DOI: 10.1146/annurev-conmatphys-031620-102024

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