Strain Enhanced Superconductivity in Li-Doped Graphene

TL;DR

This paper demonstrates that applying tensile biaxial strain to lithium-doped graphene significantly enhances its electron-phonon coupling and superconducting critical temperature, achieving up to 300% increase.

Contribution

It introduces a novel approach combining strain and adatom effects to substantially boost superconductivity in graphene.

Findings

Critical temperature increased by up to 300% with strain.

Strain and lithium adatoms synergistically enhance electron-phonon coupling.

Density functional theory confirms the effectiveness of the method.

Abstract

We present a new way to enhance the electron-phonon coupling constant and the critical superconducting temperature of graphene, significantly beyond all reported values. Using density functional theory, we explore the application effects of the tensile biaxial strain on the lithium intercalated graphene. Both effects together, the presence of adatom and the strain, trigger enhancement of critical temperature, up to 300\%, compared to non-strained lithium intercalated graphene.