Persistent spin splitting of a two-dimensional electron gas in tilted magnetic fields

TL;DR

This study investigates how tilting magnetic fields influence spin splitting in a two-dimensional electron gas, revealing persistent effects and the interplay between Rashba spin-orbit interaction and Zeeman splitting through thermodynamic measurements.

Contribution

It demonstrates the persistent spin splitting across all magnetic field ranges and elucidates how magnetic field orientation and RSOI strength affect this phenomenon.

Findings

Persistent spin splitting observed in all field ranges.

Shape of thermodynamic quantities distinguishes dominant interactions.

Amplified splitting due to interplay of tilting magnetic field and RSOI.

Abstract

By varying the orientation of the applied magnetic field with respect to the normal of a two-dimensional electron gas, the chemical potential and the specific heat reveal persistent spin splitting in all field ranges. The corresponding shape of the thermodynamic quantities distinguishes whether the Rashba spin-orbit interaction RSOI, the Zeeman term or both dominate the splitting. The interplay of the tilting of the magnetic field and RSOI resulted to an amplified splitting in weak fields. The effects of changing the RSOI strength and the Landau level broadening are also investigated.