Magneto-transport phenomena in p-doped diamond from first principles

TL;DR

This paper uses first-principles calculations to accurately model magnetotransport in p-doped diamond, revealing high mobility and Seebeck coefficients, and predicts magnetic field enhancement effects at room temperature.

Contribution

It introduces a first-principles approach combining density functional theory and Boltzmann transport equations to study magnetotransport in p-doped diamond, aligning well with experimental data.

Findings

High mobility and Seebeck coefficient in p-doped diamond

Magnetic field can enhance Seebeck coefficient by up to 30% at room temperature

Theoretical results agree with experimental measurements

Abstract

We present a first-principles study of the magnetotransport phenomena in p-doped diamond via the exact solution of the linearized Boltzmann transport equation, in which the materials' parameters, including electron-phonon and phonon-phonon interactions, are obtained from density functional theory. This approach gives results in very good agreement with experimental data for Hall and drift mobilities, low- and high-field magnetoresistance and Seebeck coefficient, including the phonon-drag effect, in a range of temperatures and carrier concentrations. In particular, our results provide a detailed characterisation of the exceptionally high values for mobility and Seebeck coefficient, and predict a large magnetic field driven enhancement of the Seebeck coefficient, of up to 30% in a magnetic field of 40 kOe already at room temperature.