Surface-enhanced charge-density-wave instability in underdoped Bi2Sr2-xLaxCuO6+δ

J. A. Rosen, R. Comin, G. Levy, D. Fournier, Z.-H. Zhu, B. Ludbrook, C. N. Veenstra, A. Nicolaou, D. Wong, P. Dosanjh, Y. Yoshida, H. Eisaki, G. R. Blake, F. White, T. T. M. Palstra, R. Sutarto, F. He, A. Fraño Pereira, Y. Lu, B. Keimer, G. Sawatzky, L. Petaccia and A. Damascelli ()
Additional contact information
J. A. Rosen: University of British Columbia
R. Comin: University of British Columbia
G. Levy: University of British Columbia
D. Fournier: University of British Columbia
Z.-H. Zhu: University of British Columbia
B. Ludbrook: University of British Columbia
C. N. Veenstra: University of British Columbia
A. Nicolaou: University of British Columbia
D. Wong: University of British Columbia
P. Dosanjh: University of British Columbia
Y. Yoshida: National Institute of Advanced Industrial Science and Technology (AIST)
H. Eisaki: National Institute of Advanced Industrial Science and Technology (AIST)
G. R. Blake: Materials Science Centre, University of Groningen
F. White: Agilent Technologies UK Ltd.
T. T. M. Palstra: Materials Science Centre, University of Groningen
R. Sutarto: Canadian Light Source, University of Saskatchewan
F. He: Canadian Light Source, University of Saskatchewan
A. Fraño Pereira: Max Planck Institute for Solid State Research
Y. Lu: Max Planck Institute for Solid State Research
B. Keimer: Max Planck Institute for Solid State Research
G. Sawatzky: University of British Columbia
L. Petaccia: Elettra Sincrotrone Trieste
A. Damascelli: University of British Columbia

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract 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 YBa2Cu3O6+x. 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 Bi2 Sr2-x Lax CuO6+δ (Bi2201), which is directly associated with an hitherto-undetected strong temperature dependence of the incommensurate superstructure periodicity below 130 K. 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.

Date: 2013
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DOI: 10.1038/ncomms2977

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