corner
corner
APS » Journals » Phys. Rev. B » Volume 71 » Issue 6
< Previous Article | Next Article >

Phys. Rev. B 71, 060501(R) (2005) [4 pages]

Doping dependence of softening in the bond-stretching phonon mode of La2−xSrxCuO4 (0⩽x⩽0.29)

Download: PDF (87 kB) Buy this article Export: BibTeX or EndNote (RIS)

T. Fukuda1,*, J. Mizuki1, K. Ikeuchi2, K. Yamada2,†, A. Q. R. Baron3, and S. Tsutsui3
1Japan Atomic Energy Research Institute (JAERI), SPring-8, Mikazuki, Hyogo 679-5148, Japan
2Institute for Chemical Research, Kyoto University, Gokasho, Uji 611-0011, Japan
3Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Mikazuki, Hyogo 679-5198, Japan

Received 1 October 2004; published 7 February 2005

The doping dependence of the softening in Cu-O bond-stretching optical phonons along [100] direction has been systematically studied on La2−xSrxCuO4 using inelastic x-ray scattering. The softening increases with x in the underdoped region and starts to saturate or makes local maximum around the optimum doping (x∼0.15). This behavior is discussed in terms of the coupling between the phonons and the low energy charge fluctuations on the doped CuO2 planes.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.71.060501
DOI:
10.1103/PhysRevB.71.060501
PACS:
74.25.Kc, 63.20.Kr, 74.72.Dn, 78.70.Ck

*Electronic mail address: fukuda@spring8.or.jp

†Present address: Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japan.

 
< Previous Article | Next Article >