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Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2)
A quantum critical point (QCP) is currently being conjectured for the BaFe(2)(As(1−x)P(x))(2) system at the critical value x (c) ≈ 0.3. In the proximity of a QCP, all thermodynamic and transport properties are expected to scale with a single characteristic energy, given by the quantum fluctuations....
Autores principales: | , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5496881/ https://www.ncbi.nlm.nih.gov/pubmed/28676703 http://dx.doi.org/10.1038/s41598-017-04724-3 |
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author | Grinenko, V. Iida, K. Kurth, F. Efremov, D. V. Drechsler, S.-L. Cherniavskii, I. Morozov, I. Hänisch, J. Förster, T. Tarantini, C. Jaroszynski, J. Maiorov, B. Jaime, M. Yamamoto, A. Nakamura, I. Fujimoto, R. Hatano, T. Ikuta, H. Hühne, R. |
author_facet | Grinenko, V. Iida, K. Kurth, F. Efremov, D. V. Drechsler, S.-L. Cherniavskii, I. Morozov, I. Hänisch, J. Förster, T. Tarantini, C. Jaroszynski, J. Maiorov, B. Jaime, M. Yamamoto, A. Nakamura, I. Fujimoto, R. Hatano, T. Ikuta, H. Hühne, R. |
author_sort | Grinenko, V. |
collection | PubMed |
description | A quantum critical point (QCP) is currently being conjectured for the BaFe(2)(As(1−x)P(x))(2) system at the critical value x (c) ≈ 0.3. In the proximity of a QCP, all thermodynamic and transport properties are expected to scale with a single characteristic energy, given by the quantum fluctuations. Such a universal behavior has not, however, been found in the superconducting upper critical field H (c2). Here we report H (c2) data for epitaxial thin films extracted from the electrical resistance measured in very high magnetic fields up to 67 Tesla. Using a multi-band analysis we find that H (c2) is sensitive to the QCP, implying a significant charge carrier effective mass enhancement at the doping-induced QCP that is essentially band-dependent. Our results point to two qualitatively different groups of electrons in BaFe(2)(As(1−x)P(x))(2). The first one (possibly associated to hot spots or whole Fermi sheets) has a strong mass enhancement at the QCP, and the second one is insensitive to the QCP. The observed duality could also be present in many other quantum critical systems. |
format | Online Article Text |
id | pubmed-5496881 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54968812017-07-10 Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) Grinenko, V. Iida, K. Kurth, F. Efremov, D. V. Drechsler, S.-L. Cherniavskii, I. Morozov, I. Hänisch, J. Förster, T. Tarantini, C. Jaroszynski, J. Maiorov, B. Jaime, M. Yamamoto, A. Nakamura, I. Fujimoto, R. Hatano, T. Ikuta, H. Hühne, R. Sci Rep Article A quantum critical point (QCP) is currently being conjectured for the BaFe(2)(As(1−x)P(x))(2) system at the critical value x (c) ≈ 0.3. In the proximity of a QCP, all thermodynamic and transport properties are expected to scale with a single characteristic energy, given by the quantum fluctuations. Such a universal behavior has not, however, been found in the superconducting upper critical field H (c2). Here we report H (c2) data for epitaxial thin films extracted from the electrical resistance measured in very high magnetic fields up to 67 Tesla. Using a multi-band analysis we find that H (c2) is sensitive to the QCP, implying a significant charge carrier effective mass enhancement at the doping-induced QCP that is essentially band-dependent. Our results point to two qualitatively different groups of electrons in BaFe(2)(As(1−x)P(x))(2). The first one (possibly associated to hot spots or whole Fermi sheets) has a strong mass enhancement at the QCP, and the second one is insensitive to the QCP. The observed duality could also be present in many other quantum critical systems. Nature Publishing Group UK 2017-07-04 /pmc/articles/PMC5496881/ /pubmed/28676703 http://dx.doi.org/10.1038/s41598-017-04724-3 Text en © The Author(s) 2017 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 Grinenko, V. Iida, K. Kurth, F. Efremov, D. V. Drechsler, S.-L. Cherniavskii, I. Morozov, I. Hänisch, J. Förster, T. Tarantini, C. Jaroszynski, J. Maiorov, B. Jaime, M. Yamamoto, A. Nakamura, I. Fujimoto, R. Hatano, T. Ikuta, H. Hühne, R. Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title | Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title_full | Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title_fullStr | Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title_full_unstemmed | Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title_short | Selective mass enhancement close to the quantum critical point in BaFe(2)(As(1−x)P(x))(2) |
title_sort | selective mass enhancement close to the quantum critical point in bafe(2)(as(1−x)p(x))(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5496881/ https://www.ncbi.nlm.nih.gov/pubmed/28676703 http://dx.doi.org/10.1038/s41598-017-04724-3 |
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