Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination

The interaction with light weakens the superconducting ground state in classical superconductors. The situation in cuprate superconductors is more complicated: illumination increases the charge carrier density, a photo-induced effect that persists below room temperature. Furthermore, systematic inve...

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Main Authors:	Stilp, E., Suter, A., Prokscha, T., Salman, Z., Morenzoni, E., Keller, H., Pahlke, P., Hühne, R., Bernhard, C., Liang, Ruixing, Hardy, W. N., Bonn, D. A., Baglo, J. C., Kiefl, R. F.
Format:	Online
Language:	English
Published:	Nature Publishing Group 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4150113/

id	pubmed-4150113
recordtype	oai_dc
spelling	pubmed-41501132014-09-02 Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination Stilp, E. Suter, A. Prokscha, T. Salman, Z. Morenzoni, E. Keller, H. Pahlke, P. Hühne, R. Bernhard, C. Liang, Ruixing Hardy, W. N. Bonn, D. A. Baglo, J. C. Kiefl, R. F. Article The interaction with light weakens the superconducting ground state in classical superconductors. The situation in cuprate superconductors is more complicated: illumination increases the charge carrier density, a photo-induced effect that persists below room temperature. Furthermore, systematic investigations in underdoped YBa2Cu3O6+x (YBCO) have shown an enhanced critical temperature Tc. Until now, studies of photo-persistent conductivity (PPC) have been limited to investigations of structural and transport properties, as well as the onset of superconductivity. Here we show how changes in the magnetic screening profile of YBCO in the Meissner state due to PPC can be determined on a nanometer scale utilizing low-energy muons. The data obtained reveal a strongly increased superfluid density within the first few tens of nanometers from the sample surface. Our findings suggest a non-trivial modification of the near-surface band structure and give direct evidence that the superfluid density of YBCO can be controlled by light illumination. Nature Publishing Group 2014-09-01 /pmc/articles/PMC4150113/ /pubmed/25176143 http://dx.doi.org/10.1038/srep06250 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 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 in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/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	Stilp, E. Suter, A. Prokscha, T. Salman, Z. Morenzoni, E. Keller, H. Pahlke, P. Hühne, R. Bernhard, C. Liang, Ruixing Hardy, W. N. Bonn, D. A. Baglo, J. C. Kiefl, R. F.
spellingShingle	Stilp, E. Suter, A. Prokscha, T. Salman, Z. Morenzoni, E. Keller, H. Pahlke, P. Hühne, R. Bernhard, C. Liang, Ruixing Hardy, W. N. Bonn, D. A. Baglo, J. C. Kiefl, R. F. Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
author_facet	Stilp, E. Suter, A. Prokscha, T. Salman, Z. Morenzoni, E. Keller, H. Pahlke, P. Hühne, R. Bernhard, C. Liang, Ruixing Hardy, W. N. Bonn, D. A. Baglo, J. C. Kiefl, R. F.
author_sort	Stilp, E.
title	Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
title_short	Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
title_full	Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
title_fullStr	Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
title_full_unstemmed	Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination
title_sort	controlling the near-surface superfluid density in underdoped yba2cu3o6+x by photo-illumination
description	The interaction with light weakens the superconducting ground state in classical superconductors. The situation in cuprate superconductors is more complicated: illumination increases the charge carrier density, a photo-induced effect that persists below room temperature. Furthermore, systematic investigations in underdoped YBa2Cu3O6+x (YBCO) have shown an enhanced critical temperature Tc. Until now, studies of photo-persistent conductivity (PPC) have been limited to investigations of structural and transport properties, as well as the onset of superconductivity. Here we show how changes in the magnetic screening profile of YBCO in the Meissner state due to PPC can be determined on a nanometer scale utilizing low-energy muons. The data obtained reveal a strongly increased superfluid density within the first few tens of nanometers from the sample surface. Our findings suggest a non-trivial modification of the near-surface band structure and give direct evidence that the superfluid density of YBCO can be controlled by light illumination.
publisher	Nature Publishing Group
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4150113/
_version_	1613129590483451904

Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination

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