Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy

In underdoped cuprate superconductors, the Fermi surface undergoes a reconstruction that produces a small electron pocket, but whether there is another, as yet, undetected portion to the Fermi surface is unknown. Establishing the complete topology of the Fermi surface is key to identifying the mecha...

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Main Authors:	Doiron-Leyraud, N., Badoux, S., René de Cotret, S., Lepault, S., LeBoeuf, D., Laliberté, F., Hassinger, E., Ramshaw, B. J., Bonn, D. A., Hardy, W. N., Liang, R., Park, J.-H.., Vignolles, D., Vignolle, B., Taillefer, L., Proust, C.
Format:	Online
Language:	English
Published:	Nature Pub. Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4316745/

id	pubmed-4316745
recordtype	oai_dc
spelling	pubmed-43167452015-02-13 Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy Doiron-Leyraud, N. Badoux, S. René de Cotret, S. Lepault, S. LeBoeuf, D. Laliberté, F. Hassinger, E. Ramshaw, B. J. Bonn, D. A. Hardy, W. N. Liang, R. Park, J.-H.. Vignolles, D. Vignolle, B. Taillefer, L. Proust, C. Article In underdoped cuprate superconductors, the Fermi surface undergoes a reconstruction that produces a small electron pocket, but whether there is another, as yet, undetected portion to the Fermi surface is unknown. Establishing the complete topology of the Fermi surface is key to identifying the mechanism responsible for its reconstruction. Here we report evidence for a second Fermi pocket in underdoped YBa2Cu3Oy, detected as a small quantum oscillation frequency in the thermoelectric response and in the c-axis resistance. The field-angle dependence of the frequency shows that it is a distinct Fermi surface, and the normal-state thermopower requires it to be a hole pocket. A Fermi surface consisting of one electron pocket and two hole pockets with the measured areas and masses is consistent with a Fermi-surface reconstruction by the charge–density–wave order observed in YBa2Cu3Oy, provided other parts of the reconstructed Fermi surface are removed by a separate mechanism, possibly the pseudogap. Nature Pub. Group 2015-01-23 /pmc/articles/PMC4316745/ /pubmed/25616011 http://dx.doi.org/10.1038/ncomms7034 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Doiron-Leyraud, N. Badoux, S. René de Cotret, S. Lepault, S. LeBoeuf, D. Laliberté, F. Hassinger, E. Ramshaw, B. J. Bonn, D. A. Hardy, W. N. Liang, R. Park, J.-H.. Vignolles, D. Vignolle, B. Taillefer, L. Proust, C.
spellingShingle	Doiron-Leyraud, N. Badoux, S. René de Cotret, S. Lepault, S. LeBoeuf, D. Laliberté, F. Hassinger, E. Ramshaw, B. J. Bonn, D. A. Hardy, W. N. Liang, R. Park, J.-H.. Vignolles, D. Vignolle, B. Taillefer, L. Proust, C. Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
author_facet	Doiron-Leyraud, N. Badoux, S. René de Cotret, S. Lepault, S. LeBoeuf, D. Laliberté, F. Hassinger, E. Ramshaw, B. J. Bonn, D. A. Hardy, W. N. Liang, R. Park, J.-H.. Vignolles, D. Vignolle, B. Taillefer, L. Proust, C.
author_sort	Doiron-Leyraud, N.
title	Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
title_short	Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
title_full	Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
title_fullStr	Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
title_full_unstemmed	Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
title_sort	evidence for a small hole pocket in the fermi surface of underdoped yba2cu3oy
description	In underdoped cuprate superconductors, the Fermi surface undergoes a reconstruction that produces a small electron pocket, but whether there is another, as yet, undetected portion to the Fermi surface is unknown. Establishing the complete topology of the Fermi surface is key to identifying the mechanism responsible for its reconstruction. Here we report evidence for a second Fermi pocket in underdoped YBa2Cu3Oy, detected as a small quantum oscillation frequency in the thermoelectric response and in the c-axis resistance. The field-angle dependence of the frequency shows that it is a distinct Fermi surface, and the normal-state thermopower requires it to be a hole pocket. A Fermi surface consisting of one electron pocket and two hole pockets with the measured areas and masses is consistent with a Fermi-surface reconstruction by the charge–density–wave order observed in YBa2Cu3Oy, provided other parts of the reconstructed Fermi surface are removed by a separate mechanism, possibly the pseudogap.
publisher	Nature Pub. Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4316745/
_version_	1613184111836397568

Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy

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