RKKY interaction induced by two-dimensional hole gases
Abstract
We analytically compute the RKKY range function as induced by two-dimensional (2D) hole gases. The bulk valence-band includes heavy-hole (HH) and light-hole (LH) states and their dynamics is described by the Luttinger Hamiltonian which we adopt as our framework. We show that even for situations where only the lowest HH-like subband is occupied the resulting form of the RKKY function can be very different as compared to the one of a 2D electron gas. The associated spin susceptibility tensor has entries along the quantum-well directions and perpendicular to it. Our formluae for the spin susceptibility tensor reveal the crucial influence of HH-LH mixing which gives rise to large anisotropies both among the in-plane components as well as among the in-plane components and the component perpendicular to the quantum-well.
Cite
@article{arxiv.1305.5274,
title = {RKKY interaction induced by two-dimensional hole gases},
author = {T. Kernreiter},
journal= {arXiv preprint arXiv:1305.5274},
year = {2013}
}
Comments
8 pages, 5 figures; references added; to appear in Phys. Rev. B