Suppression of the charge-density-wave state in Sr10Ca4Cu24o41 by external pressure

C. A. Kuntscher, A. Huber, and M. Hücker
Phys. Rev. B 89, 134510 – Published 17 April 2014

Abstract

The influence of external pressure on the charge-density-wave (CDW) ground state of the quasi-one-dimensional two-leg ladder compound Sr10Ca4Cu24o41 has been studied by optical reflectivity measurements as a function of temperature (10–300 K) and pressure P (0.3–4.3 GPa) over the spectral range 580–6000 cm1. With increasing pressure the CDW transition temperature TCDW decreases with the linear pressure coefficient 70 K/GPa, and above 3 GPa the CDW phase is suppressed at all temperatures. This behavior is similar to that in compounds Sr14xCaxCu24o41 with increasing Ca content x at ambient pressure, with the simple scaling x3×P(GPa). The size of the CDW gap decreases with increasing pressure, whereas the dimensionality of the high-temperature insulating phase in Sr10Ca4Cu24o41 within the ladder plane is hardly affected by external pressure.

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  • Received 9 January 2014
  • Revised 11 March 2014

DOI:https://doi.org/10.1103/PhysRevB.89.134510

©2014 American Physical Society

Authors & Affiliations

C. A. Kuntscher1,*, A. Huber1, and M. Hücker2

  • 1Experimentalphysik 2, Universität Augsburg, D-86195 Augsburg, Germany
  • 2Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA

  • *christine.kuntscher@physik.uni-augsburg.de

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Vol. 89, Iss. 13 — 1 April 2014

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