X-ray absorption spectroscopy (XAS) and high-resolution X-ray diffraction are combined to study the interplay between electronic and lattice structures in controlling the superconductivity in cuprates with a model charge-compensated CaxLa1- xBa1.75-xLa0.25+xCu3Oy (0≤x<0.5, y7.13) system. In spite of a large change in Tc, the doped holes, determined by the Cu L and O K XAS, hardly show any variation with the x. On the other hand, the CuO2 plaquette size shows a systematic change due to different size of substituted cations. The results provide a direct evidence for the chemical pressure being a key parameter for controlling the superconducting ground state of the cuprates

Sanna, S., Agrestini, S., Zheng, K., De Renzi Roberto, ., Saini, N. (2009). Experimental evidence of chemical-pressure-controlled superconductivity in cuprates. EUROPHYSICS LETTERS, 86(6), 670071-670076 [10.1209/0295-5075/86/67007].

Experimental evidence of chemical-pressure-controlled superconductivity in cuprates

SANNA, SAMUELE;
2009

Abstract

X-ray absorption spectroscopy (XAS) and high-resolution X-ray diffraction are combined to study the interplay between electronic and lattice structures in controlling the superconductivity in cuprates with a model charge-compensated CaxLa1- xBa1.75-xLa0.25+xCu3Oy (0≤x<0.5, y7.13) system. In spite of a large change in Tc, the doped holes, determined by the Cu L and O K XAS, hardly show any variation with the x. On the other hand, the CuO2 plaquette size shows a systematic change due to different size of substituted cations. The results provide a direct evidence for the chemical pressure being a key parameter for controlling the superconducting ground state of the cuprates
2009
Sanna, S., Agrestini, S., Zheng, K., De Renzi Roberto, ., Saini, N. (2009). Experimental evidence of chemical-pressure-controlled superconductivity in cuprates. EUROPHYSICS LETTERS, 86(6), 670071-670076 [10.1209/0295-5075/86/67007].
Sanna, Samuele; Agrestini, Stefano; Zheng, Kefei; De Renzi Roberto, ; Saini, Naurang
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/549507
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