Low temperature Pmmm and C2/m phases in Sr2CuO3+δ high temperature superconductor

Low temperature Pmmm and C2/m phases in Sr₂CuO_3+δ high temperature superconductor

Wang Hai-Bo¹, Luo Zhen-Lin^{2, ‡}, Yang Yuan-Jun², Liu Qing-Qing³, Hu Si-Xia², Yang Meng-Meng², Jin Chang-Qing³, Gao Chen^{2, 4, †}

X-ray diffraction result of Sr₂CuO_3+δ as function of temperature and incident x-ray energy. (a) and (b) The x-ray diffraction patterns obtained at varied temperatures with x-ray energy of (a) 8.500 keV and (b) 8.990 keV. Some modulated structures emerge in the low temperature region.