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Copyright Nature Publishing Group May 2016

Abstract

The application of magnetic fields to layered cuprates suppresses their high-temperature superconducting behaviour and reveals competing ground states. In widely studied underdoped YBa2 Cu3 O6+x (YBCO), the microscopic nature of field-induced electronic and structural changes at low temperatures remains unclear. Here we report an X-ray study of the high-field charge density wave (CDW) in YBCO. For hole dopings ∼0.123, we find that a field (B∼10 T) induces additional CDW correlations along the CuO chain (b-direction) only, leading to a three-dimensional (3D) ordered state along this direction at B∼15 T. The CDW signal along the a-direction is also enhanced by field, but does not develop an additional pattern of correlations. Magnetic field modifies the coupling between the CuO2 bilayers in the YBCO structure, and causes the sudden appearance of the 3D CDW order. The mirror symmetry of individual bilayers is broken by the CDW at low and high fields, allowing Fermi surface reconstruction, as recently suggested.

Details

Title
Magnetic field controlled charge density wave coupling in underdoped YBa2Cu3O6+x
Author
Chang, J; Blackburn, E; Ivashko, O; Holmes, A T; Christensen, N B; Hücker, M; Liang, Ruixing; Bonn, D A; Hardy, W N; Rütt, U; Zimmermann, M V; Forgan, E M; Hayden, S M
Pages
11494
Publication year
2016
Publication date
May 2016
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1786882291
Copyright
Copyright Nature Publishing Group May 2016