Respective Roles of Electron-Phonon and Electron-Electron Interactions in the Transport and Quasiparticle Properties of SrVO₃
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1.
California Institute of Technology
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2.
Jožef Stefan Institute
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3.
Beijing Institute of Technology
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4.
Collège 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.
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Additional details
- 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
- Accepted
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2024-09-23Accepted
- Available
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2024-10-29Published online
- Publication Status
- Published