Influence of non-local exchange on RKKY interactions in III-V diluted magnetic semiconductors
C. Timm, A. H. MacDonald
Abstract
The RKKY interaction between substitutional Mn local moments in GaAs is both spin-direction-dependent and spatially anisotropic. In this Letter we address the strength of these anisotropies using a semi-phenomenological tight-binding model which treats the hybridization between Mn d-orbitals and As p-orbitals perturbatively and accounts realistically for the non-local exchange interaction between their spins. We show that exchange non-locality, valence-band spin-orbit coupling, and band-structure anisotropy all play a role in determining the strength of both effects. We use these results to estimate the degree of ground-state magnetization suppression due to frustrating interactions between randomly located Mn ions.
Create a lesson
Related papers
Longitudinal and Transverse Thermoelectric Properties in Topological Quantum Materials
Jyoti Duhan, Anil Kumar B. M., Satya N. Guin et al.
Thermally Conditioned Time-Series Forecasting of Grain Growth in Polycrystalline Materials
Eliane Younes, Elie Hachem, Marc Bernacki
Evolutionary Design of Interpretable Spatial Descriptors for Structure-Property Relationship Discovery
Aditya Raghavan, Sergei V Kalinin
Millikelvin magnetometry up to 30~T using a multi-cross micro-Hall sensor
Bingbing Tong, Yinina Ma, Zhenhua Zhao et al.
First-principles study of the formation of Group-IV--vacancy color centers in diamond
Xiangru Han, Adam Gali
Anomalous thermal transport in isotope-enriched germanium carbide
Wenjiang Zhou, Bai Song