| Autor: |
H-H, Kim, E, Lefrançois, K, Kummer, R, Fumagalli, N B, Brookes, D, Betto, S, Nakata, M, Tortora, J, Porras, T, Loew, M E, Barber, L, Braicovich, A P, Mackenzie, C W, Hicks, B, Keimer, M, Minola, M, Le Tacon |
| Rok vydání: |
2020 |
| Zdroj: |
Physical review letters. 126(3) |
| ISSN: |
1079-7114 |
| Popis: |
We report a comprehensive Cu L_{3}-edge resonant x-ray scattering (RXS) study of two- and three-dimensional (2D and 3D) incommensurate charge correlations in single crystals of the underdoped high-temperature superconductor YBa_{2}Cu_{3}O_{6.67} under uniaxial compression up to 1% along the two inequivalent Cu─O─Cu bond directions (a and b) in the CuO_{2} planes. We confirm the strong in-plane anisotropy of the 2D charge correlations and observe their symmetric response to pressure: pressure along a enhances correlations along b, and vice versa. Our results imply that the underlying order parameter is uniaxial. In contrast, 3D long-range charge order is only observed along b in response to compression along a. Spectroscopic RXS measurements show that the 3D charge order resides exclusively in the CuO_{2} planes and may thus be generic to the cuprates. We discuss implications of these results for models of electronic nematicity and for the interplay between charge order and superconductivity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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