UZH-Logo

Maintenance Infos

Muon spin rotation investigation of the pressure effect on the magnetic penetration depth in YBa_{2}Cu_{3}O_{x}


Maisuradze, A; Shengelaya, A; Amato, A; Pomjakushina, E; Keller, H (2011). Muon spin rotation investigation of the pressure effect on the magnetic penetration depth in YBa_{2}Cu_{3}O_{x}. Physical Review. B, Condensed Matter and Materials Physics, 84(18):184523.

Abstract

The pressure dependence of the magnetic penetration depth λ in polycrystalline samples of YBa2Cu3Ox with different oxygen concentrations x=6.45, 6.6, 6.8, and 6.98 was studied by muon spin rotation (μSR). The pressure dependence of the superfluid density ρs∝1/λ2 as a function of the superconducting transition temperature Tc is found to deviate from the usual Uemura line. The ratio (∂Tc/∂P)/(∂ρs/∂P) is smaller by a factor of ≃2 than that of the Uemura relation. In underdoped samples, the zero-temperature superconducting gap Δ0 and the BCS ratio Δ0/kBTc both increase with increasing external hydrostatic pressure, implying an increase of the coupling strength with pressure. The relation between the pressure effect and the oxygen isotope effect on λ is also discussed. In order to analyze reliably the μSR spectra of samples with strong magnetic moments in a pressure cell, a special model was developed and applied.

©2011 American Physical Society

The pressure dependence of the magnetic penetration depth λ in polycrystalline samples of YBa2Cu3Ox with different oxygen concentrations x=6.45, 6.6, 6.8, and 6.98 was studied by muon spin rotation (μSR). The pressure dependence of the superfluid density ρs∝1/λ2 as a function of the superconducting transition temperature Tc is found to deviate from the usual Uemura line. The ratio (∂Tc/∂P)/(∂ρs/∂P) is smaller by a factor of ≃2 than that of the Uemura relation. In underdoped samples, the zero-temperature superconducting gap Δ0 and the BCS ratio Δ0/kBTc both increase with increasing external hydrostatic pressure, implying an increase of the coupling strength with pressure. The relation between the pressure effect and the oxygen isotope effect on λ is also discussed. In order to analyze reliably the μSR spectra of samples with strong magnetic moments in a pressure cell, a special model was developed and applied.

©2011 American Physical Society

Citations

17 citations in Web of Science®
6 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

146 downloads since deposited on 24 Jan 2012
40 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:24 Jan 2012 16:34
Last Modified:05 Apr 2016 15:29
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.84.184523
Related URLs:http://arxiv.org/abs/1107.1341
Permanent URL: https://doi.org/10.5167/uzh-56981

Download

[img]
Content: Published Version
Filetype: PDF - Registered users only
Size: 706kB
View at publisher
[img]
Preview
Content: Accepted Version
Filetype: PDF
Size: 848kB

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations