Lattice instability in the normal state of La2-xSrxCuO4

T. Suzuki; M. Nohara; Y. Maeno; T. Fujita; I. Tanaka; H. Kojima

doi:10.1007/BF00724580

Lattice instability in the normal state of La_2-xSr_xCuO₄

T. Suzuki, M. Nohara, Y. Maeno, T. Fujita, I. Tanaka, H. Kojima

Research output: Contribution to journal › Article

5 Citations (Scopus)

Abstract

Novel softening has been found in the transverse elastic constant (C₁₁-C₁₂)/2 below 50 K in single-crystalline La_1.86Sr_0.14CuO₄ (LSCO) by high-precision ultrasonic measurements in magnetic fields H along the c axis. With decreasing temperature, this lattice softening persists down to the superconducting transition temperature T_c(H), which is reduced to 14 K by applying fields up to 14 T. Below T_c(H) the softening turns to rapid hardening. This behavior indicates the presence of lattice instability of the orthorhombic (Bmab) structure in the normal state of LSCO, which disappears in the superconducting state. This is evidence for the intimate interplay between high-T_c superconductivity and the lattice instability in LSCO.

Original language	English
Pages (from-to)	419-421
Number of pages	3
Journal	Journal of Superconductivity
Volume	7
Issue number	2
DOIs	https://doi.org/10.1007/BF00724580
Publication status	Published - Apr 1994
Externally published	Yes

Keywords

Ultrasonic experiments
electron-phonon coupling
electronic band structure
lattice instability
single-crystalline LSCO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

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Suzuki, T., Nohara, M., Maeno, Y., Fujita, T., Tanaka, I., & Kojima, H. (1994). Lattice instability in the normal state of La_2-xSr_xCuO₄. Journal of Superconductivity, 7(2), 419-421. https://doi.org/10.1007/BF00724580

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abstract = "Novel softening has been found in the transverse elastic constant (C11-C12)/2 below 50 K in single-crystalline La1.86Sr0.14CuO4 (LSCO) by high-precision ultrasonic measurements in magnetic fields H along the c axis. With decreasing temperature, this lattice softening persists down to the superconducting transition temperature Tc(H), which is reduced to 14 K by applying fields up to 14 T. Below Tc(H) the softening turns to rapid hardening. This behavior indicates the presence of lattice instability of the orthorhombic (Bmab) structure in the normal state of LSCO, which disappears in the superconducting state. This is evidence for the intimate interplay between high-Tc superconductivity and the lattice instability in LSCO.",

keywords = "Ultrasonic experiments, electron-phonon coupling, electronic band structure, lattice instability, single-crystalline LSCO",

author = "T. Suzuki and M. Nohara and Y. Maeno and T. Fujita and I. Tanaka and H. Kojima",

year = "1994",

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T1 - Lattice instability in the normal state of La2-xSrxCuO4

AU - Suzuki, T.

AU - Nohara, M.

AU - Maeno, Y.

AU - Fujita, T.

AU - Tanaka, I.

AU - Kojima, H.

PY - 1994/4

Y1 - 1994/4

N2 - Novel softening has been found in the transverse elastic constant (C11-C12)/2 below 50 K in single-crystalline La1.86Sr0.14CuO4 (LSCO) by high-precision ultrasonic measurements in magnetic fields H along the c axis. With decreasing temperature, this lattice softening persists down to the superconducting transition temperature Tc(H), which is reduced to 14 K by applying fields up to 14 T. Below Tc(H) the softening turns to rapid hardening. This behavior indicates the presence of lattice instability of the orthorhombic (Bmab) structure in the normal state of LSCO, which disappears in the superconducting state. This is evidence for the intimate interplay between high-Tc superconductivity and the lattice instability in LSCO.

AB - Novel softening has been found in the transverse elastic constant (C11-C12)/2 below 50 K in single-crystalline La1.86Sr0.14CuO4 (LSCO) by high-precision ultrasonic measurements in magnetic fields H along the c axis. With decreasing temperature, this lattice softening persists down to the superconducting transition temperature Tc(H), which is reduced to 14 K by applying fields up to 14 T. Below Tc(H) the softening turns to rapid hardening. This behavior indicates the presence of lattice instability of the orthorhombic (Bmab) structure in the normal state of LSCO, which disappears in the superconducting state. This is evidence for the intimate interplay between high-Tc superconductivity and the lattice instability in LSCO.

KW - Ultrasonic experiments

KW - electron-phonon coupling

KW - electronic band structure

KW - lattice instability

KW - single-crystalline LSCO

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