d0 Perovskite-Semiconductor Electronic Structure

TL;DR

This paper develops an effective Hamiltonian model for electron-doped d0 perovskite semiconductors, incorporating spin-orbit coupling, tetragonal distortion, and effective-mass parameters, with methods to extract these from experimental data.

Contribution

It introduces a detailed low-energy Hamiltonian for d0 perovskites considering various physical effects and provides a way to determine its parameters from experiments.

Findings

Hamiltonian depends on spin-orbit interaction, tetragonal distortion, and effective masses.

Parameters can be extracted from ARPES, Raman, and magneto-transport measurements.

Estimated parameters for SrTiO3 are provided.

Abstract

We address the low-energy effective Hamiltonian of electron doped d0 perovskite semiconductors in cubic and tetragonal phases using the k*p method. The Hamiltonian depends on the spin-orbit interaction strength, on the temperature-dependent tetragonal distortion, and on a set of effective-mass parameters whose number is determined by the symmetry of the crystal. We explain how these parameters can be extracted from angle resolved photo-emission, Raman spectroscopy, and magneto-transport measurements and estimate their values in SrTiO3.