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.
| Original language | English |
|---|---|
| Pages (from-to) | 419-421 |
| Number of pages | 3 |
| Journal | Journal of Superconductivity |
| Volume | 7 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 1994 |
| Externally published | Yes |
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Keywords
- electron-phonon coupling
- electronic band structure
- lattice instability
- single-crystalline LSCO
- Ultrasonic experiments
ASJC Scopus subject areas
- Condensed Matter Physics
- Physics and Astronomy (miscellaneous)
- Electronic, Optical and Magnetic Materials
Cite this
Lattice instability in the normal state of La2-xSrxCuO4 . / Suzuki, T.; Nohara, Minoru; Maeno, Y.; Fujita, T.; Tanaka, I.; Kojima, H.
In: Journal of Superconductivity, Vol. 7, No. 2, 04.1994, p. 419-421.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Lattice instability in the normal state of La2-xSrxCuO4
AU - Suzuki, T.
AU - Nohara, Minoru
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 - electron-phonon coupling
KW - electronic band structure
KW - lattice instability
KW - single-crystalline LSCO
KW - Ultrasonic experiments
UR - http://www.scopus.com/inward/record.url?scp=0028410185&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028410185&partnerID=8YFLogxK
U2 - 10.1007/BF00724580
DO - 10.1007/BF00724580
M3 - Article
AN - SCOPUS:0028410185
VL - 7
SP - 419
EP - 421
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 2
ER -