Lattice-shifted nematic quantum critical point in FeSe1−x S x
Abstract We report the evolution of nematic fluctuations in FeSe1−x S x single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) x c ~ 0.17 via Raman scattering. The Raman spectra in the B 1g nematic channel consist of two components, but only the low energy...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-04-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-021-00336-3 |
| _version_ | 1818403325971791872 |
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| author | S. Chibani D. Farina P. Massat M. Cazayous A. Sacuto T. Urata Y. Tanabe K. Tanigaki A. E. Böhmer P. C. Canfield M. Merz S. Karlsson P. Strobel P. Toulemonde I. Paul Y. Gallais |
| author_facet | S. Chibani D. Farina P. Massat M. Cazayous A. Sacuto T. Urata Y. Tanabe K. Tanigaki A. E. Böhmer P. C. Canfield M. Merz S. Karlsson P. Strobel P. Toulemonde I. Paul Y. Gallais |
| author_sort | S. Chibani |
| collection | DOAJ |
| description | Abstract We report the evolution of nematic fluctuations in FeSe1−x S x single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) x c ~ 0.17 via Raman scattering. The Raman spectra in the B 1g nematic channel consist of two components, but only the low energy one displays clear fingerprints of critical behavior and is attributed to itinerant carriers. Curie–Weiss analysis of the associated nematic susceptibility indicates a substantial effect of nemato-elastic coupling, which shifts the location of the nematic QCP. We argue that this lattice-induced shift likely explains the absence of any enhancement of the superconducting transition temperature at the QCP. The presence of two components in the nematic fluctuations spectrum is attributed to the dual aspect of electronic degrees of freedom in Hund’s metals, with both itinerant carriers and local moments contributing to the nematic susceptibility. |
| first_indexed | 2024-12-14T08:22:28Z |
| format | Article |
| id | doaj.art-35745c90ce6a4938948a39f74b9de131 |
| institution | Directory Open Access Journal |
| issn | 2397-4648 |
| language | English |
| last_indexed | 2024-12-14T08:22:28Z |
| publishDate | 2021-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj.art-35745c90ce6a4938948a39f74b9de1312022-12-21T23:09:45ZengNature Portfolionpj Quantum Materials2397-46482021-04-01611810.1038/s41535-021-00336-3Lattice-shifted nematic quantum critical point in FeSe1−x S xS. Chibani0D. Farina1P. Massat2M. Cazayous3A. Sacuto4T. Urata5Y. Tanabe6K. Tanigaki7A. E. Böhmer8P. C. Canfield9M. Merz10S. Karlsson11P. Strobel12P. Toulemonde13I. Paul14Y. Gallais15Université de Paris, Matériaux et Phénomènes Quantiques, CNRSUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSDepartment of Physics, Graduate School of Science, Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityKarlsruhe Institute of Technology, Institute for Quantum Materials and TechnologiesAmes Laboratory US DOE, Iowa State UniversityKarlsruhe Institute of Technology, Institute for Quantum Materials and TechnologiesUniversité Grenoble Alpes, CNRS, Grenoble INP, Institut NéelUniversité Grenoble Alpes, CNRS, Grenoble INP, Institut NéelUniversité Grenoble Alpes, CNRS, Grenoble INP, Institut NéelUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSUniversité de Paris, Matériaux et Phénomènes Quantiques, CNRSAbstract We report the evolution of nematic fluctuations in FeSe1−x S x single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) x c ~ 0.17 via Raman scattering. The Raman spectra in the B 1g nematic channel consist of two components, but only the low energy one displays clear fingerprints of critical behavior and is attributed to itinerant carriers. Curie–Weiss analysis of the associated nematic susceptibility indicates a substantial effect of nemato-elastic coupling, which shifts the location of the nematic QCP. We argue that this lattice-induced shift likely explains the absence of any enhancement of the superconducting transition temperature at the QCP. The presence of two components in the nematic fluctuations spectrum is attributed to the dual aspect of electronic degrees of freedom in Hund’s metals, with both itinerant carriers and local moments contributing to the nematic susceptibility.https://doi.org/10.1038/s41535-021-00336-3 |
| spellingShingle | S. Chibani D. Farina P. Massat M. Cazayous A. Sacuto T. Urata Y. Tanabe K. Tanigaki A. E. Böhmer P. C. Canfield M. Merz S. Karlsson P. Strobel P. Toulemonde I. Paul Y. Gallais Lattice-shifted nematic quantum critical point in FeSe1−x S x npj Quantum Materials |
| title | Lattice-shifted nematic quantum critical point in FeSe1−x S x |
| title_full | Lattice-shifted nematic quantum critical point in FeSe1−x S x |
| title_fullStr | Lattice-shifted nematic quantum critical point in FeSe1−x S x |
| title_full_unstemmed | Lattice-shifted nematic quantum critical point in FeSe1−x S x |
| title_short | Lattice-shifted nematic quantum critical point in FeSe1−x S x |
| title_sort | lattice shifted nematic quantum critical point in fese1 x s x |
| url | https://doi.org/10.1038/s41535-021-00336-3 |
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