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Absence of orbital currents in superconducting YBa_{2}Cu_{4}O_{8} using a zeeman-perturbed nuclear-quadrupole-resonance technique


Strässle, S; Graneli, B; Mali, M; Roos, J; Keller, H (2011). Absence of orbital currents in superconducting YBa_{2}Cu_{4}O_{8} using a zeeman-perturbed nuclear-quadrupole-resonance technique. Physical Review Letters, 106(9):097003.

Abstract

Zeeman perturbed nuclear quadrupole resonance was applied to evaluate weak magnetic fields
in the context of orbital currents in cuprate superconductors. The magnetic environment of the
barium atom in c-axis oriented powder samples of YBa2Cu4O8 was investigated in the pseudogap
phase at 90 K. No evidence for orbital currents was found: Any static and dynamic field must be
less than 0.07mT and 0.7mT respectively.

Abstract

Zeeman perturbed nuclear quadrupole resonance was applied to evaluate weak magnetic fields
in the context of orbital currents in cuprate superconductors. The magnetic environment of the
barium atom in c-axis oriented powder samples of YBa2Cu4O8 was investigated in the pseudogap
phase at 90 K. No evidence for orbital currents was found: Any static and dynamic field must be
less than 0.07mT and 0.7mT respectively.

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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:17 Nov 2011 11:50
Last Modified:05 Apr 2016 15:06
Publisher:American Physical Society
ISSN:0031-9007
Publisher DOI:https://doi.org/10.1103/PhysRevLett.106.097003

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