Surface-enhanced charge-density-wave instability in underdoped Bi2201
| Autor: | Rosen, J. A., Comin, R., Levy, G., Fournier, D., Zhu, Z. -H., Ludbrook, B., Veenstra, C. N., Nicolaou, A., Wong, D., Dosanjh, P., Yoshida, Y., Eisaki, H., Blake, G. R., White, F., Palstra, T. T. M., Sutarto, R., He, F., Frano, A., Lu, Y., Keimer, B., Sawatzky, G. A., Petaccia, L., Damascelli, A. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Nature Communications 4, 1977 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/ncomms2977 |
| Popis: | Neutron and x-ray scattering experiments have provided mounting evidence for spin and charge ordering phenomena in underdoped cuprates. These range from early work on stripe correlations in Nd-LSCO to the latest discovery of charge-density-waves in YBCO. Both phenomena are characterized by a pronounced dependence on doping, temperature, and an externally applied magnetic field. Here we show that these electron-lattice instabilities exhibit also a previously unrecognized bulk-surface dichotomy. Surface-sensitive electronic and structural probes uncover a temperature-dependent evolution of the CuO2 plane band dispersion and apparent Fermi pockets in underdoped Bi2201, which is directly associated with an hitherto-undetected strong temperature dependence of the incommensurate superstructure periodicity below 130K. In stark contrast, the structural modulation revealed by bulk-sensitive probes is temperature independent. These findings point to a surface-enhanced incipient charge-density-wave instability, driven by Fermi surface nesting. This discovery is of critical importance in the interpretation of single-particle spectroscopy data and establishes the surface of cuprates and other complex oxides as a rich playground for the study of electronically soft phases. Comment: A high-resolution version with supplementary material can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/Bi2201_PG_Q2.pdf |
| Databáze: | arXiv |
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