Dynamical Properties of Charged Stripes in La_{2-x}Sr_xCuO_4

Details Dynamical Properties of Charged Stripes in La_{2-x}Sr_xCuO_4 Dynamical Properties of Charged Stripes in La_{2-x}Sr_xCuO_4

2004-06-07

arxiv.org/abs/cond-mat/0406169v3

Phys. Rev. Lett. 95, 117002 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, added references, minor changes in the text, two figures replaced, published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.117002

Inelastic light-scattering spectra of underdoped ${\rm La_{2-x}Sr_xCuO_4}$ (LSCO) single crystals are presented which provide direct evidence of the formation of quasi one-dimensional charged structures in the two-dimensional $\rm CuO_2$ planes. The ``stripes'' manifest themselves in a Drude-like peak at low energies and temperatures. The selection rules allow us to determine the orientation to be along the diagonals at $x=0.02$ and along the principal axes at $x=0.10$. The electron-lattice interaction determines the correlation length which turns out to be larger in compound classes with lower superconducting transition temperatures. Temperature is the only scale of the response at different doping levels demonstrating the importance of quantum critical behavior.

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