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...
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2021
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oai:doaj.org-article:35745c90ce6a4938948a39f74b9de1312021-12-02T18:02:56ZLattice-shifted nematic quantum critical point in FeSe1−x S x10.1038/s41535-021-00336-32397-4648https://doaj.org/article/35745c90ce6a4938948a39f74b9de1312021-04-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00336-3https://doaj.org/toc/2397-4648Abstract 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.S. ChibaniD. FarinaP. MassatM. CazayousA. SacutoT. UrataY. TanabeK. TanigakiA. E. BöhmerP. C. CanfieldM. MerzS. KarlssonP. StrobelP. ToulemondeI. PaulY. GallaisNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-8 (2021) |
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DOAJ |
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DOAJ |
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Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 |
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Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 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 |
| 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. |
| format |
article |
| 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 |
| title |
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_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_sort |
lattice-shifted nematic quantum critical point in fese1−x s x |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/35745c90ce6a4938948a39f74b9de131 |
| work_keys_str_mv |
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| _version_ |
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