Charge stripes seen with x-rays in La_(1.45)Nd_(0.4)Sr_(0.15)CuO_(4)

Abstract

Superstructure reflections due to the ordering of holes into stripes in La_(1.45)Nd_(0.4)Sr_(0.15)CuO_4 have been studied with high energy x-ray diffraction. These reflections have been observed clearly for the first time in a sample which is superconducting at low temperatures (T_c = 10 K). The stripe peaks vanish above 62(5) K whereas the magnetic signal of the stripe ordering which has been seen with neutrons before is already suppressed at 45 K. Our results confirm that the ordering of spins and holes is driven by the charges as it is found in the case of La_(1.6-x)Nd_(0.4)Sr_(x)CuO_(4) at the doping level of x = 0.12.

arXiv comment8 pages

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