High-Pressure Transport Properties of the Superconducting Spin-Ladder System Sr14-xCaxCu24O41+δ

Takeshi Nakanishi; Nobuo Môri; Chizuko Murayama; Hiroki Takahashi; Takashi Nagata; Masatomo Uehara; Jun Akimitsu; Kyôichi Kinoshita; Naoki Motoyama; Hiroshi Eisaki; Shin Ichi Uchida

doi:10.1143/JPSJ.67.2408

High-Pressure Transport Properties of the Superconducting Spin-Ladder System Sr_14-xCa_xCu₂₄O_41+δ

Takeshi Nakanishi, Nobuo Môri, Chizuko Murayama, Hiroki Takahashi, Takashi Nagata, Masatomo Uehara, Jun Akimitsu, Kyôichi Kinoshita, Naoki Motoyama, Hiroshi Eisaki, Shin Ichi Uchida

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We report the electrical resistivity, the Hall coefficient, R_H, and the Magnetoresistance, MR, at pressures up to 2.0 GPa, of the spin-ladder compound Sr_14-xCa_xCu₂₄O_41+δ, on both a polycrystal (x = 13.6) and single crystals (x = 11 and 12), in which superconductivity has been observed only in a range of both Ca content (∼ 11 < x < 14) and pressure (∼ 1.5 < P <∼ 8 GPa). The pressure dependence of the R_H, with positive sign, indicates that carrier density increases with increasing pressure and localization of hole carriers at low temperature is substantially suppressed by applying pressure. We have also found that a positive MR, which violates Kohler's rule, seems to appear below the temperature at which a spin gap begins to open and strongly depends on the temperature as well as both on Ca content and applied pressure, suggesting that this MR is closely related to the mobile holes in the spin singlet state.

Original language	English
Pages (from-to)	2408-2414
Number of pages	7
Journal	journal of the physical society of japan
Volume	67
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.67.2408
Publication status	Published - Jul 1998

Keywords

Hall effect
High pressure effect
Magnetoresistance
Spin-ladder system
SrCaCuO
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

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High-Pressure Transport Properties of the Superconducting Spin-Ladder System Sr_14-xCa_xCu₂₄O_41+δ. / Nakanishi, Takeshi; Môri, Nobuo; Murayama, Chizuko; Takahashi, Hiroki; Nagata, Takashi; Uehara, Masatomo; Akimitsu, Jun; Kinoshita, Kyôichi; Motoyama, Naoki; Eisaki, Hiroshi; Uchida, Shin Ichi.

In: journal of the physical society of japan, Vol. 67, No. 7, 07.1998, p. 2408-2414.

Research output: Contribution to journal › Article › peer-review

Nakanishi, Takeshi ; Môri, Nobuo ; Murayama, Chizuko ; Takahashi, Hiroki ; Nagata, Takashi ; Uehara, Masatomo ; Akimitsu, Jun ; Kinoshita, Kyôichi ; Motoyama, Naoki ; Eisaki, Hiroshi ; Uchida, Shin Ichi. / High-Pressure Transport Properties of the Superconducting Spin-Ladder System Sr_14-xCa_xCu₂₄O_41+δ. In: journal of the physical society of japan. 1998 ; Vol. 67, No. 7. pp. 2408-2414.

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abstract = "We report the electrical resistivity, the Hall coefficient, RH, and the Magnetoresistance, MR, at pressures up to 2.0 GPa, of the spin-ladder compound Sr14-xCaxCu24O41+δ, on both a polycrystal (x = 13.6) and single crystals (x = 11 and 12), in which superconductivity has been observed only in a range of both Ca content (∼ 11 < x < 14) and pressure (∼ 1.5 < P <∼ 8 GPa). The pressure dependence of the RH, with positive sign, indicates that carrier density increases with increasing pressure and localization of hole carriers at low temperature is substantially suppressed by applying pressure. We have also found that a positive MR, which violates Kohler's rule, seems to appear below the temperature at which a spin gap begins to open and strongly depends on the temperature as well as both on Ca content and applied pressure, suggesting that this MR is closely related to the mobile holes in the spin singlet state.",

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AU - Nagata, Takashi

AU - Uehara, Masatomo

AU - Akimitsu, Jun

AU - Kinoshita, Kyôichi

AU - Motoyama, Naoki

AU - Eisaki, Hiroshi

AU - Uchida, Shin Ichi

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N2 - We report the electrical resistivity, the Hall coefficient, RH, and the Magnetoresistance, MR, at pressures up to 2.0 GPa, of the spin-ladder compound Sr14-xCaxCu24O41+δ, on both a polycrystal (x = 13.6) and single crystals (x = 11 and 12), in which superconductivity has been observed only in a range of both Ca content (∼ 11 < x < 14) and pressure (∼ 1.5 < P <∼ 8 GPa). The pressure dependence of the RH, with positive sign, indicates that carrier density increases with increasing pressure and localization of hole carriers at low temperature is substantially suppressed by applying pressure. We have also found that a positive MR, which violates Kohler's rule, seems to appear below the temperature at which a spin gap begins to open and strongly depends on the temperature as well as both on Ca content and applied pressure, suggesting that this MR is closely related to the mobile holes in the spin singlet state.

AB - We report the electrical resistivity, the Hall coefficient, RH, and the Magnetoresistance, MR, at pressures up to 2.0 GPa, of the spin-ladder compound Sr14-xCaxCu24O41+δ, on both a polycrystal (x = 13.6) and single crystals (x = 11 and 12), in which superconductivity has been observed only in a range of both Ca content (∼ 11 < x < 14) and pressure (∼ 1.5 < P <∼ 8 GPa). The pressure dependence of the RH, with positive sign, indicates that carrier density increases with increasing pressure and localization of hole carriers at low temperature is substantially suppressed by applying pressure. We have also found that a positive MR, which violates Kohler's rule, seems to appear below the temperature at which a spin gap begins to open and strongly depends on the temperature as well as both on Ca content and applied pressure, suggesting that this MR is closely related to the mobile holes in the spin singlet state.

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