Cargando…
Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3)
The Mott metal-insulator transition—a manifestation of Coulomb interactions among electrons—is known as a discontinuous transition. Recent theoretical studies, however, suggest that the transition is continuous if the Mott insulator carries a spin liquid with a spinon Fermi surface. Here, we demonst...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778024/ https://www.ncbi.nlm.nih.gov/pubmed/29358740 http://dx.doi.org/10.1038/s41467-017-02679-7 |
_version_ | 1783294274512617472 |
---|---|
author | Furukawa, Tetsuya Kobashi, Kazuhiko Kurosaki, Yosuke Miyagawa, Kazuya Kanoda, Kazushi |
author_facet | Furukawa, Tetsuya Kobashi, Kazuhiko Kurosaki, Yosuke Miyagawa, Kazuya Kanoda, Kazushi |
author_sort | Furukawa, Tetsuya |
collection | PubMed |
description | The Mott metal-insulator transition—a manifestation of Coulomb interactions among electrons—is known as a discontinuous transition. Recent theoretical studies, however, suggest that the transition is continuous if the Mott insulator carries a spin liquid with a spinon Fermi surface. Here, we demonstrate the case of a quasi-continuous Mott transition from a Fermi liquid to a spin liquid in an organic triangular-lattice system κ-(ET)(2)Cu(2)(CN)(3). Transport experiments performed under fine pressure tuning have found that as the Mott transition is approached, the Fermi liquid coherence temperature continuously falls to the scale of kelvins, with a divergent quasi-particle decay rate on the metal side, and the charge gap continuously closes on the insulator side. A Clausius-Clapeyron analysis provides thermodynamic evidence for the extremely weak first-order nature of the transition. These results provide additional support for the existence of a spinon Fermi surface, which becomes an electron Fermi surface when charges are delocalized. |
format | Online Article Text |
id | pubmed-5778024 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-57780242018-01-29 Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) Furukawa, Tetsuya Kobashi, Kazuhiko Kurosaki, Yosuke Miyagawa, Kazuya Kanoda, Kazushi Nat Commun Article The Mott metal-insulator transition—a manifestation of Coulomb interactions among electrons—is known as a discontinuous transition. Recent theoretical studies, however, suggest that the transition is continuous if the Mott insulator carries a spin liquid with a spinon Fermi surface. Here, we demonstrate the case of a quasi-continuous Mott transition from a Fermi liquid to a spin liquid in an organic triangular-lattice system κ-(ET)(2)Cu(2)(CN)(3). Transport experiments performed under fine pressure tuning have found that as the Mott transition is approached, the Fermi liquid coherence temperature continuously falls to the scale of kelvins, with a divergent quasi-particle decay rate on the metal side, and the charge gap continuously closes on the insulator side. A Clausius-Clapeyron analysis provides thermodynamic evidence for the extremely weak first-order nature of the transition. These results provide additional support for the existence of a spinon Fermi surface, which becomes an electron Fermi surface when charges are delocalized. Nature Publishing Group UK 2018-01-22 /pmc/articles/PMC5778024/ /pubmed/29358740 http://dx.doi.org/10.1038/s41467-017-02679-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Furukawa, Tetsuya Kobashi, Kazuhiko Kurosaki, Yosuke Miyagawa, Kazuya Kanoda, Kazushi Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title | Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title_full | Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title_fullStr | Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title_full_unstemmed | Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title_short | Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)(2)Cu(2)(CN)(3) |
title_sort | quasi-continuous transition from a fermi liquid to a spin liquid in κ-(et)(2)cu(2)(cn)(3) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5778024/ https://www.ncbi.nlm.nih.gov/pubmed/29358740 http://dx.doi.org/10.1038/s41467-017-02679-7 |
work_keys_str_mv | AT furukawatetsuya quasicontinuoustransitionfromafermiliquidtoaspinliquidinket2cu2cn3 AT kobashikazuhiko quasicontinuoustransitionfromafermiliquidtoaspinliquidinket2cu2cn3 AT kurosakiyosuke quasicontinuoustransitionfromafermiliquidtoaspinliquidinket2cu2cn3 AT miyagawakazuya quasicontinuoustransitionfromafermiliquidtoaspinliquidinket2cu2cn3 AT kanodakazushi quasicontinuoustransitionfromafermiliquidtoaspinliquidinket2cu2cn3 |