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), P. Giura, (ESRF, Grenoble, France), H. Eisaki (Geballe Laboratory, Stanford University,, U. S. A.) N. Kikugawa
TL;DR
This study uses infrared spectroscopy to detect and analyze charge stripe dynamics in La(2-x)Sr(x)CuO(4) superconductors, revealing temperature and doping-dependent features indicative of charge ordering phenomena.
Contribution
It provides direct infrared evidence of charge stripe dynamics in La(2-x)Sr(x)CuO(4), linking optical signatures to charge ordering in high-temperature superconductors.
Findings
Strong far-infrared peaks indicating charge stripes
Charge stripe dynamics vary with doping and temperature
Infrared signatures resemble those of one-dimensional charge order
Abstract
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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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics