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Phason and amplitudon in the charge-density-wave phase of one-dimensional charge stripes in La(2-x)Sr(x)CuO4.

Authors
  • Sugai, S
  • Takayanagi, Y
  • Hayamizu, N
Type
Published Article
Journal
Physical review letters
Publication Date
Apr 07, 2006
Volume
96
Issue
13
Pages
137003–137003
Identifiers
PMID: 16712024
Source
Medline
License
Unknown

Abstract

The present systematic Raman scattering experiments reveal the phason and amplitudon of the charge density wave (CDW) mode in the charge stripes of La(2-x)Sr(x)CuO4. Only about 15% of the electronic density of states condenses into the CDW state. The symmetries of the CDW modes change by the rotation of the stripes at the insulator-metal transition. The energy of the phason is finite at 0.06 < or = x < or = 0.1 and zero at x = 0.035 and 0.115 < or = x < or = 0.135, which suggests that the CDW is commensurate at 0.06 < or = x < or = 0.1 and incommensurate otherwise. The zero-energy phason seems to reduce T(c) at x = 1/8.

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