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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.19562 |
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| _version_ | 1866916881118527488 |
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| author | Yuzbashyan, Emil A. Altshuler, Boris L. Patra, Aniket |
| author_facet | Yuzbashyan, Emil A. Altshuler, Boris L. Patra, Aniket |
| contents | We show that thermal equilibrium between conduction electrons and phonons becomes kinetically unstable when the renormalized electron-phonon coupling exceeds a certain threshold. We prove that negative electronic specific heat, $C_\mathrm{el} < 0$, is sufficient to trigger the instability. Specifically, the instability sets in as soon as the quasiparticle weight becomes negative over a range of energies, even before $C_\mathrm{el}$ turns negative. This is an inherently nonequilibrium phenomenon, occurring prior to the formation of any equilibrium phase. Depending on the system, it can proceed along different pathways, ultimately resulting in a structural transition to an insulating or metallic state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_19562 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Instability of metals with respect to strong electron-phonon interaction Yuzbashyan, Emil A. Altshuler, Boris L. Patra, Aniket Strongly Correlated Electrons We show that thermal equilibrium between conduction electrons and phonons becomes kinetically unstable when the renormalized electron-phonon coupling exceeds a certain threshold. We prove that negative electronic specific heat, $C_\mathrm{el} < 0$, is sufficient to trigger the instability. Specifically, the instability sets in as soon as the quasiparticle weight becomes negative over a range of energies, even before $C_\mathrm{el}$ turns negative. This is an inherently nonequilibrium phenomenon, occurring prior to the formation of any equilibrium phase. Depending on the system, it can proceed along different pathways, ultimately resulting in a structural transition to an insulating or metallic state. |
| title | Instability of metals with respect to strong electron-phonon interaction |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.19562 |