Evidence for local lattice fluctuations as a response function of the charge stripe order in the La1.48Nd0.4Sr0.12CuO4 system

Phys. Rev. B 64, 132510 – Published 13 September 2001
N. L. Saini, H. Oyanagi, A. Lanzara, D. Di Castro, S. Agrestini, A. Bianconi, F. Nakamura, and T. Fujita

Abstract

We have used polarized Cu K-edge extended x-ray absorption fine structure to investigate the local lattice displacements in the charge-ordered La1.48Nd0.4Sr0.12CuO4 system. The temperature-dependent distance broadening, given by the Debye-Waller factors of the Cu-O bonds measuring local lattice fluctuations, shows a clear steplike increase below the charge stripe order temperature. The results construct a direct evidence for the local lattice fluctuations as a response function of the charge stripe ordering in the cuprate superconductors.

DOI: http://dx.doi.org/10.1103/PhysRevB.64.132510

  • Received 29 January 2001
  • Revised 31 May 2001
  • Published 13 September 2001

© 2001 The American Physical Society

Authors & Affiliations

N. L. Saini

  • Unità INFM, Università di Roma “La Sapienza,” Piazzale Aldo Moro 2, 00185 Roma, Italy

H. Oyanagi

  • Electrotechnical Laboratory, 1-1-4 Umezono, Tsukuba 305-8568, Japan

A. Lanzara, D. Di Castro, S. Agrestini, and A. Bianconi

  • Unità INFM and Dipartimento di Fisica, Università di Roma “La Sapienza,” Piazzale Aldo Moro 2, 00185 Roma, Italy

F. Nakamura and T. Fujita

  • Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526, Japan

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