Unconventional pairing in excitonic condensates under spin-orbit coupling

TL;DR

This paper demonstrates how Rashba and Dresselhaus spin-orbit couplings improve experimental detection and understanding of excitonic condensates by affecting photoluminescence, thermodynamics, and spin susceptibility at low temperatures.

Contribution

It reveals the role of spin-orbit coupling in enhancing experimental signatures and thermodynamic behavior of excitonic condensates, providing new insights into their properties.

Findings

Spin-orbit coupling enhances photoluminescence signals.

Thermodynamic observables follow a power law temperature dependence.

Nondiagonal elements appear in static spin susceptibility.

Abstract

It is shown that the Rashba and Dresselhaus spin orbit couplings enhance the conclusive power in the experiments on the excitonic condensed state by at least three low temperature effects. First, spin orbit coupling facilitates the photoluminescense measurements via enhancing the bright contribution in the otherwise dominantly dark exciton condensed state. The second is the presence of a power law temperature dependence of the thermodynamic observables in low temperatures and the weakening of the second order transition at the critical temperature. The third is the appearance of the nondiagonal elements in the static spin susceptibility.