Quantitative assessment of the universal thermopower in the Hubbard model
Abstract As primarily an electronic observable, the room-temperature thermopower S in cuprates provides possibilities for a quantitative assessment of the Hubbard model. Using determinant quantum Monte Carlo, we demonstrate agreement between Hubbard model calculations and experimentally measured roo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-42772-8 |
| _version_ | 1797636805046042624 |
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| author | Wen O. Wang Jixun K. Ding Edwin W. Huang Brian Moritz Thomas P. Devereaux |
| author_facet | Wen O. Wang Jixun K. Ding Edwin W. Huang Brian Moritz Thomas P. Devereaux |
| author_sort | Wen O. Wang |
| collection | DOAJ |
| description | Abstract As primarily an electronic observable, the room-temperature thermopower S in cuprates provides possibilities for a quantitative assessment of the Hubbard model. Using determinant quantum Monte Carlo, we demonstrate agreement between Hubbard model calculations and experimentally measured room-temperature S across multiple cuprate families, both qualitatively in terms of the doping dependence and quantitatively in terms of magnitude. We observe an upturn in S with decreasing temperatures, which possesses a slope comparable to that observed experimentally in cuprates. From our calculations, the doping at which S changes sign occurs in close proximity to a vanishing temperature dependence of the chemical potential at fixed density. Our results emphasize the importance of interaction effects in the systematic assessment of the thermopower S in cuprates. |
| first_indexed | 2024-03-11T12:39:26Z |
| format | Article |
| id | doaj.art-34f968b82a7c49868fb5197804698e16 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-11T12:39:26Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-34f968b82a7c49868fb5197804698e162023-11-05T12:22:29ZengNature PortfolioNature Communications2041-17232023-11-011411610.1038/s41467-023-42772-8Quantitative assessment of the universal thermopower in the Hubbard modelWen O. Wang0Jixun K. Ding1Edwin W. Huang2Brian Moritz3Thomas P. Devereaux4Department of Applied Physics, Stanford UniversityDepartment of Applied Physics, Stanford UniversityDepartment of Physics and Institute of Condensed Matter Theory, University of Illinois at Urbana-ChampaignStanford Institute for Materials and Energy Sciences, SLAC National Accelerator LaboratoryStanford Institute for Materials and Energy Sciences, SLAC National Accelerator LaboratoryAbstract As primarily an electronic observable, the room-temperature thermopower S in cuprates provides possibilities for a quantitative assessment of the Hubbard model. Using determinant quantum Monte Carlo, we demonstrate agreement between Hubbard model calculations and experimentally measured room-temperature S across multiple cuprate families, both qualitatively in terms of the doping dependence and quantitatively in terms of magnitude. We observe an upturn in S with decreasing temperatures, which possesses a slope comparable to that observed experimentally in cuprates. From our calculations, the doping at which S changes sign occurs in close proximity to a vanishing temperature dependence of the chemical potential at fixed density. Our results emphasize the importance of interaction effects in the systematic assessment of the thermopower S in cuprates.https://doi.org/10.1038/s41467-023-42772-8 |
| spellingShingle | Wen O. Wang Jixun K. Ding Edwin W. Huang Brian Moritz Thomas P. Devereaux Quantitative assessment of the universal thermopower in the Hubbard model Nature Communications |
| title | Quantitative assessment of the universal thermopower in the Hubbard model |
| title_full | Quantitative assessment of the universal thermopower in the Hubbard model |
| title_fullStr | Quantitative assessment of the universal thermopower in the Hubbard model |
| title_full_unstemmed | Quantitative assessment of the universal thermopower in the Hubbard model |
| title_short | Quantitative assessment of the universal thermopower in the Hubbard model |
| title_sort | quantitative assessment of the universal thermopower in the hubbard model |
| url | https://doi.org/10.1038/s41467-023-42772-8 |
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