Spin triplet superconducting pairing in doped MoS$_2$

TL;DR

This paper predicts the emergence of spin triplet f-wave superconductivity in doped MoS₂ using quantum Monte Carlo methods, highlighting its robustness across interaction strengths and insensitivity to spin-orbit effects.

Contribution

It demonstrates the presence of spin triplet pairing in doped MoS₂ within a simplified three-orbital model using advanced quantum Monte Carlo techniques.

Findings

f-wave pairing dominates near charge neutrality

Pairing susceptibility increases with Coulomb interaction

Insensitivity to spin-orbit coupling effects

Abstract

Searching for triplet superconductivity has been pursued intensively in a broad field of material science and quantum information for decades. Nevertheless, these novel states remain rare. Within a simplified effective three-orbital model, we reveal a spin triplet pairing in doped MoS$_2$ by employing both the finite temperature determinant quantum Monte Carlo approach and the ground state constrained-phase quantum Monte Carlo method. In a wide filling region of $\avg{n}=0.60-0.80$ around charge neutrality $\avg{n}=2/3$, the $f$-wave pairing dominates over other symmetries. The pairing susceptibility strongly increases as the on-site Coulomb interaction increases, and it is insensitive to spin-orbit coupling.