Superconductivity in the extended Hubbard chain with three-electron density interaction

Weiting Chen; Jun Zhang; Hanqin Ding

Results in Physics (Aug 2022)

Superconductivity in the extended Hubbard chain with three-electron density interaction

Weiting Chen,
Jun Zhang,
Hanqin Ding

Affiliations

Weiting Chen: Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi, 830046, China; Center for Theoretical Physics, School of Physical Science and Technology, Xinjiang University, Urumqi, 830017, China
Jun Zhang: Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi, 830046, China; Center for Theoretical Physics, School of Physical Science and Technology, Xinjiang University, Urumqi, 830017, China
Hanqin Ding: Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi, 830046, China; Center for Theoretical Physics, School of Physical Science and Technology, Xinjiang University, Urumqi, 830017, China; School of Physics and Electronics, Central South University, Changsha, 410083, China; Corresponding author at: Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi, 830046, China.

Journal volume & issue: Vol. 39
p. 105670

Abstract

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At weak coupling and at half filling, we analytically study effects of an intersite three-electron density interaction (P) of the one-dimensional extended Hubbard model in addition to the usual two-electron density interactions (U,V). By the bosonization and renormalization group approaches, we obtain the ground-state phase diagram of the model. In particular, we find that even in the presence of repulsive U and V, the attractive P may give rise to the superconducting phases for 2V≤min{2|P|;4|P|−U}.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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