Spin-orbit coupling mediated tunable electron heat capacity of quantum wells

Abstract

The heat capacity of conduction electrons obtained from the Sommerfeld expansion is shown to be tunable via the Rashba and Dresselhaus spin-orbit coupling parameters. Using an AlInSb/InSb/AlInSb as a representative heterostructure with alterable well and asymmetric barrier regions, the heat capacity is found to be higher for the spin-down electrons and suffers a reduction for wider wells. A further lowering is obtained through the application of an uniaxial strain. Finally, we suggest a method to determine the spin lifetimes for spins relaxing via the D'yakonov-Perel' mechanism from experimental estimates of thermodynamic potentials such as the Helmholtz free energy and the heat capacity.

4 pages; 3 figures

References in corpus (3)

• New Perspectives for Rashba Spin-Orbit Coupling
• Persistent spin helix in Rashba-Dresselhaus two-dimensional electron systems
• Tunable chirality and circular dichroism of a topological insulator with $C_{2v}$ symmetry as a function of Rashba and Dresselhaus parameters