Field induced superconductivity with enhanced and tunable paramagnetic limit

TL;DR

This paper proposes a new type of nonuniform superconducting state in multilayered systems under in-plane magnetic fields, where Zeeman effects are compensated, enabling field-induced superconductivity with tunable paramagnetic limits.

Contribution

It introduces a novel superconducting state in multilayered systems with alternating interlayer coupling, demonstrating field-induced superconductivity through Zeeman effect compensation.

Findings

Identification of a nonuniform superconducting state under in-plane magnetic fields.

Demonstration of Zeeman effect compensation via bonding-antibonding energy splitting.

Conditions for experimental realization of the predicted phenomena.

Abstract

We demonstrate that in a superconducting multilayered system with alternating interlayer coupling a new type of nonuniform superconducting state can be realized under in-plane magnetic field. The Zeeman effect in this state is compensated by the energy splitting between bonding and antibonding levels. Such compensation mechanism at low temperature leads to the field-induced superconductivity. We discuss the conditions for the experimental observation of the predicted phenomena.