Bulk Charge Ordering in the CuO2 Plane of the Cuprate Superconductor YBa2Cu3O6.9 by High-Pressure NMR
Felix Bloch Institute for Solid State Physics, University of Leipzig, Linnestr. 5, 04103 Leipzig, Germany
The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
Walther-Meißner-Institute for Low Temperature Research, Walther-Meißnerstr. 8, 85748 Garching, Germany
Author to whom correspondence should be addressed.
Received: 26 June 2018 / Revised: 17 July 2018 / Accepted: 27 July 2018 / Published: 29 July 2018
Cuprate superconductors still hold many open questions, and recently, the role of symmetry breaking electronic charge ordering resurfaced in underdoped cuprates as a phenomenon that competes with superconductivity. Here, unambiguous nuclear magnetic resonance (NMR) proof is presented for the existence of local charge ordering in nearly optimally doped YBa
, even up to room temperature. Increasing pressure and decreasing temperature leads to the highest degree of order in the sense that the two oxygen atoms of the unit cell of the CuO
plane develop a charge difference of about 0.02 holes, and order throughout the whole crystal. At ambient conditions, a slightly smaller charge difference and a decreased order is found. Evidence from literature data suggests that this charge ordering is ubiquitous to the CuO
plane of all cuprates. Thus, the role of charge ordering in the cuprates must be reassessed.
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Reichardt, S.; Jurkutat, M.; Guehne, R.; Kohlrautz, J.; Erb, A.; Haase, J. Bulk Charge Ordering in the CuO2 Plane of the Cuprate Superconductor YBa2Cu3O6.9 by High-Pressure NMR. Condens. Matter 2018, 3, 23.
Reichardt S, Jurkutat M, Guehne R, Kohlrautz J, Erb A, Haase J. Bulk Charge Ordering in the CuO2 Plane of the Cuprate Superconductor YBa2Cu3O6.9 by High-Pressure NMR. Condensed Matter. 2018; 3(3):23.
Reichardt, Steven; Jurkutat, Michael; Guehne, Robin; Kohlrautz, Jonas; Erb, Andreas; Haase, Jürgen. 2018. "Bulk Charge Ordering in the CuO2 Plane of the Cuprate Superconductor YBa2Cu3O6.9 by High-Pressure NMR." Condens. Matter 3, no. 3: 23.
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