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 language | English |
|---|---|
| Number of pages | 1 |
| Journal | Physical Review Letters |
| Volume | 90 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - Jan 1 2003 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
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 journal › Article
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TY - JOUR
T1 - Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping
AU - Vuletić, T.
AU - Korin-Hamzić, B.
AU - Tomić, S.
AU - Gorshunov, B.
AU - Haas, P.
AU - Rõõm, T.
AU - Dressel, M.
AU - Akimitsu, Jun
AU - Sasaki, T.
AU - Nagata, T.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.90.257002
DO - 10.1103/PhysRevLett.90.257002
M3 - Article
AN - SCOPUS:85038271147
VL - 90
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
ER -