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Updated: Jun 7, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Respective Roles of Electron-Phonon and Electron-Electron Interactions in the Transport and Quasiparticle Properties
David J Abramovitch1,2, Jernej Mravlje3,4, Jin-Jian Zhou5
1Department of Applied Physics and Materials Science, and Department of Physics, <a href="https://ror.org/05dxps055">California Institute of Technology</a>, Pasadena, California 91125, USA.
Abstract:
The spectral and transport properties of strongly correlated metals, such as SrVO_{3} (SVO), are widely attributed to electron-electron (e-e) interactions, with lattice vibrations (phonons) playing a secondary role. Here, using first-principles electron-phonon (e-ph) and dynamical mean field theory calculations, we show that e-ph interactions play an essential role in SVO: they govern the electron scattering and resistivity in a wide temperature range down to 30 K, and induce an experimentally observed kink in the spectral function. In contrast, the e-e interactions control quasiparticle renormalization and low temperature transport, and enhance the e-ph coupling. We clarify the origin of the near T^{2} temperature dependence of the resistivity by analyzing the e-e and e-ph limited transport regimes. Our work disentangles the electronic and lattice degrees of freedom in a prototypical correlated metal, revealing the dominant role of e-ph interactions in SVO.
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