| Issue |
Europhys. Lett.
Volume 59, Number 1, July 2002
|
|
|---|---|---|
| Page(s) | 128 - 134 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00167-2 | |
| Published online | 01 June 2002 | |
Fingerprints of charge ordering in anelastic spectra
of underdoped 
National Laboratory of Solid State Microstructures and Physics Department
Nanjing University - Nanjing 210093, PRC
Received:
4
February
2002
Accepted:
1
April
2002
We carefully investigate the anelastic spectra of La
SrxCuO4
from 90 to 300 K at kHz range. Two internal friction peaks
are observed near 130 and 160 K, respectively, whose amplitudes demonstrate
crossovers around the insulating-superconducting phase boundary 
. The 160 K peak is of phase-like transition character and originates
from the localization of diagonal charge stripes by LTO lattice and the
resultant lattice adjustment. The origin of the 130 K relaxation is
discussed in the framework of structural inhomogeneity as a combined result
of charge inhomogeneity and electron-phonon coupling.
PACS: 74.25.Ld – Mechanical and acoustical properties, elasticity, and ultrasonic attenuation / 63.20.Kr – Phonon-electron and phonon-phonon interactions / 74.72.Dn – La-based cuprates
© EDP Sciences, 2002
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