Interlayer conductivity in the superconductor <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Tl</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant="normal">Ba</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant="normal">CuO</mi></mrow><mrow><mn>6</mn><mo>+</mo><mi>δ</mi></mrow></msub></mrow><mo>:</mo></math></span> Energetics and energy scales

A. S. Katz; S. I. Woods; E. J. Singley; T. W. Li; M. Xu; D. G. Hinks; R. C. Dynes; D. N. Basov

doi:10.1103/PhysRevB.61.5930

Interlayer conductivity in the superconductor ${Tl}_{2} {Ba}_{2} {CuO}_{6 + δ} :$ Energetics and energy scales

A. S. Katz, S. I. Woods, E. J. Singley, T. W. Li, M. Xu, D. G. Hinks, R. C. Dynes, and D. N. Basov

Phys. Rev. B 61, 5930 – Published 1 March 2000

Abstract

We report on infrared studies of the c-axis electrodynamics of ${Tl}_{2} {Ba}_{2} {CuO}_{6 + δ}$ crystals. A sum-rule analysis reveals spectral weight shifts that can be interpreted as a kinetic energy change at the superconducting transition. In optimally doped crystals, showing an incoherent normal-state response, the kinetic energy is lowered at $T < T_{c},$ but no significant change is found in the overdoped samples, which have more coherent conductivity at $T > T_{c} .$

Received 13 October 1999

DOI:https://doi.org/10.1103/PhysRevB.61.5930

Authors & Affiliations

A. S. Katz, S. I. Woods, and E. J. Singley

Department of Physics, University of California–San Diego, La Jolla, California 92093-0319

T. W. Li^*

Department of Materials Science, Argonne National Laboratory, Argonne, Illinois 60439

M. Xu^*

James Franck Institute, University of Chicago, Chicago, Illinois 60637

D. G. Hinks

Department of Materials Science, Argonne National Laboratory, Argonne, Illinois 60439

R. C. Dynes and D. N. Basov

Department of Physics, University of California–San Diego, La Jolla, California 92093-0319

^*Present address: Lucent Technologies, 2000 North Naperville Road, Naperville, IL 60566.

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Vol. 61, Iss. 9 — 1 March 2000

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