| Autor: |
Nicolas Doiron-Leyraud, S. Lepault, O. Cyr-Choinière, B. Vignolle, G. Grissonnanche, F. Laliberté, J. Chang, N. Barišić, M. K. Chan, L. Ji, X. Zhao, Y. Li, M. Greven, C. Proust, Louis Taillefer |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Physical Review X, Vol 3, Iss 2, p 021019 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.3.021019 |
| Popis: |
Charge-density-wave order has been observed in cuprate superconductors whose crystal structure breaks the square symmetry of the CuO_{2} planes, such as orthorhombic YBa_{2}Cu_{3}O_{y} (YBCO), but not so far in cuprates that preserve that symmetry, such as tetragonal HgBa_{2}CuO_{4+δ} (Hg1201). We have measured the Hall (R_{H}), Seebeck (S), and Nernst (ν) coefficients of underdoped Hg1201 in magnetic fields large enough to suppress superconductivity. The high-field R_{H}(T) and S(T) are found to drop with decreasing temperature and become negative, as also observed in YBCO at comparable doping. In YBCO, the negative R_{H} and S are signatures of a small electron pocket caused by Fermi-surface reconstruction, attributed to charge-density-wave modulations observed in the same range of doping and temperature. We deduce that a similar Fermi-surface reconstruction takes place in Hg1201, evidence that density-wave order exists in this material. A striking similarity is also found in the normal-state Nernst coefficient ν(T), further supporting this interpretation. Given the model nature of Hg1201, Fermi-surface reconstruction appears to be common to all hole-doped cuprates, suggesting that density-wave order is a fundamental property of these materials. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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