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Unconventional superconductivity in a strongly correlated band-insulator without doping

Chattopadhyay, A and Krishnamurthy, HR and Garg, A (2021) Unconventional superconductivity in a strongly correlated band-insulator without doping. In: SciPost Physics Core, 4 (2).

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Official URL: https://doi.org/10.21468/SciPostPhysCore.4.2.009


We present a novel route for attaining unconventional superconductivity in a strongly correlated system without doping. In a simple model of a correlated band insulator at half-filling we demonstrate, based on a generalization of the projected wavefunctions method, that superconductivity emerges for a broad range of model parameters when e-e interactions and the bare band-gap are both much larger than the kinetic energy, provided the system has sufficient frustration against the magnetic order. As the interactions are tuned, the superconducting phase appears sandwiched between the correlated band insulator followed by a paramagnetic metal on one side, and a ferrimagnetic metal, antiferromagnetic half-metal, and Mott insulator phases on the other side.

Item Type: Journal Article
Publication: SciPost Physics Core
Publisher: Institute of Economic Research, Nicolaus Copernicus University
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 22 May 2023 03:23
Last Modified: 22 May 2023 03:23
URI: https://eprints.iisc.ac.in/id/eprint/81694

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