Dynamical Properties of Charged Stripes in La2xSrxCuO4

L. Tassini, F. Venturini, Q.-M. Zhang, R. Hackl, N. Kikugawa, and T. Fujita
Phys. Rev. Lett. 95, 117002 – Published 6 September 2005

Abstract

Inelastic light-scattering spectra of underdoped La2xSrxCuO4 single crystals are presented which provide direct evidence of the formation of quasi-one-dimensional charged structures in the two-dimensional CuO2 planes. The stripes manifest themselves in a Drude-like peak at low energies and temperatures. The selection rules allow us to determine the orientation to be along the diagonals at x=0.02 and along the principal axes at x=0.10. The electron-lattice interaction determines the correlation length which turns out to be larger in compound classes with lower superconducting transition temperatures. Temperature is the only scale of the response at different doping levels demonstrating the importance of quantum critical behavior.

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  • Received 4 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.95.117002

©2005 American Physical Society

Authors & Affiliations

L. Tassini1, F. Venturini1,*, Q.-M. Zhang1,†, R. Hackl1, N. Kikugawa2,‡, and T. Fujita2,§

  • 1Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
  • 2ADSM, Hiroshima University, Higashi-Hiroshima 739-8526, Japan

  • *Permanent address: Bruker Biospin AG, 8117 Fällanden, Switzerland.
  • Permanent address: National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, People’s Republic of China.
  • Permanent address: Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • §Also at: Institute of Spatial Science for Regional and Global Culture, Waseda University, Tokyo 169-8555, Japan.

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Issue

Vol. 95, Iss. 11 — 9 September 2005

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