Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping

T. Vuletić, B. Korin-Hamzić, S. Tomić, B. Gorshunov, P. Haas, T. Rõõm, M. Dressel, Jun Akimitsu, T. Sasaki, T. Nagata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The charge response in the spin chain and/or ladder compound [Formula presented] is characterized by dc resistivity, low-frequency dielectric spectroscopy and optical spectroscopy. We identify a phase transition below which a charge-density wave (CDW) develops in the ladder arrays. Calcium doping suppresses this phase with the transition temperature decreasing from 210 K for [Formula presented] to 10 K for [Formula presented], and the CDW gap from 130 meV down to 3 meV, respectively. This suppression is due to the worsened nesting originating from the increase of the interladder tight-binding hopping integrals, as well as from disorder introduced at the Sr sites. These results altogether speak in favor of two-dimensional superconductivity under pressure.

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume90
Issue number25
DOIs
Publication statusPublished - Jan 1 2003
Externally publishedYes

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calcium
retarding
ladders
spectroscopy
superconductivity
transition temperature
disorders
low frequencies
electrical resistivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Vuletić, T., Korin-Hamzić, B., Tomić, S., Gorshunov, B., Haas, P., Rõõm, T., ... Nagata, T. (2003). Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping. Physical Review Letters, 90(25). https://doi.org/10.1103/PhysRevLett.90.257002

Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping. / Vuletić, T.; Korin-Hamzić, B.; Tomić, S.; Gorshunov, B.; Haas, P.; Rõõm, T.; Dressel, M.; Akimitsu, Jun; Sasaki, T.; Nagata, T.

In: Physical Review Letters, Vol. 90, No. 25, 01.01.2003.

Research output: Contribution to journalArticle

Vuletić, T, Korin-Hamzić, B, Tomić, S, Gorshunov, B, Haas, P, Rõõm, T, Dressel, M, Akimitsu, J, Sasaki, T & Nagata, T 2003, 'Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping', Physical Review Letters, vol. 90, no. 25. https://doi.org/10.1103/PhysRevLett.90.257002
Vuletić, T. ; Korin-Hamzić, B. ; Tomić, S. ; Gorshunov, B. ; Haas, P. ; Rõõm, T. ; Dressel, M. ; Akimitsu, Jun ; Sasaki, T. ; Nagata, T. / Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping. In: Physical Review Letters. 2003 ; Vol. 90, No. 25.
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AU - Rõõm, T.

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