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arxiv: cond-mat/0203572 · v1 · submitted 2002-03-27 · ❄️ cond-mat.supr-con

Infrared signatures of charge stripes in La(2-x)Sr(x)CuO(4)

A. Lucarelli , S. Lupi , M. Ortolani , P. Calvani , P. Maselli , M. Capizzi (INFM - Dip.to di Fisica , Universita' di Roma La Sapienza , Italy)
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P. Giura (ESRF Grenoble France) H. Eisaki (Geballe Laboratory Stanford University U. S. A.) N. Kikugawa T. Fujita (Institute for Chemical Research Kyoto University Japan) M. Fujita K. Yamada (ADSM Hiroshima University
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keywords chargeinfraredstripesallowsbeenbehaviorcharge-orderingclosely
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The in-plane optical conductivity of seven La(2-x)Sr(x)CuO(4) single crystals with x between 0 and 0.15 has been studied from 30 to 295 K. All doped samples exhibit strong peaks in the far-infrared, which closely resemble those observed in Cu-O "ladders" with one-dimensional charge-ordering. The behavior with doping and temperature of the peak energy, width, and intensity allows us to conclude that we are observing charge stripes dynamics in La(2-x)Sr(x)CuO(4) on the fast time scale of infrared spectroscopy.

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