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Published November 1, 2024 | Version Published
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Respective Roles of Electron-Phonon and Electron-Electron Interactions in the Transport and Quasiparticle Properties of SrVO₃

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon JoΕΎef Stefan Institute
  • 3. ROR icon Beijing Institute of Technology
  • 4. ROR icon CollΓ¨ge de France

Abstract

The spectral and transport properties of strongly correlated metals, such as SrVO3 (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 𝑇2 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.

Copyright and License

© 2024 American Physical Society

Acknowledgement

We thank Andrew Millis, Jennifer Coulter, and Roman Engel-Herbert for helpful discussions. D. J. A. is supported by the National Science Foundation Graduate Research Fellowship under Grant No. 2139433. This work was also supported by the National Science Foundation under Grant No. OAC-2209262, which provided for code development. D. J. A. and M. B. were partially supported by the AFOSR and Clarkson Aerospace under Grant No. FA95502110460. J.-J. Z. acknowledges support from the National Key R&D Program of China (Grant No. 2022YFA1403400) and the National Natural Science Foundation of China (Grant No. 12104039). J. M. is supported by the Slovenian Research Agency (ARIS) under Grants No. P1-0044 and No. J1-2458. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 using NERSC award NERSC DDR-ERCAP0026831. The Flatiron Institute is a division of the Simons Foundation.

Supplemental Material

Supplemental Material: details on the computational methods, spectral functions and self-energies at higher energy, effects of higher-order e-ph interactions and vertex correction on the resistivity, origin of the temperature dependence of the e-ph limited resistivity, DFPT+U calculations and choice of the Hubbard-U parameter, and self-energies and spectral functions with DFPT+U e-ph coupling.

Files

PhysRevLett.133.186501.pdf

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Additional details

Related works

Is supplemented by
Supplemental Material: https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.133.186501/SrVO3_Paper_SM.pdf (URL)

Funding

National Science Foundation
Graduate Research Fellowship 2139433
National Science Foundation
OAC-2209262
United States Air Force Office of Scientific Research
Ministry of Science and Technology of the People's Republic of China
2022YFA1403400
The Slovenian Research and Innovation Agency
P1-0044
The Slovenian Research and Innovation Agency
J1-2458
United States Department of Energy
DE-AC02-05CH11231
National Natural Science Foundation of China
12104039
Clarkson Aerospace
FA95502110460

Dates

Accepted
2024-09-23
Accepted
Available
2024-10-29
Published online

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Published