δ-Influence on the pressure-effect on Tc of HgBa2CuO4+δ and the inverse parabolic Tc-relation

C. W. Chu; Y. Cao; Q. Xiong; Y. Y. Xue

doi:10.1007/BF00722813

δ-Influence on the pressure-effect on T_c of HgBa₂CuO_4+δ and the inverse parabolic T_c-relation

C. W. Chu, Y. Cao, Q. Xiong, Y. Y. Xue

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Abstract

We have observed a δ-independent linear pressure effect on T_c of HgBa₂CuO_4+δ under hydrostatic pressures up to 1.7 GPa for δ≤0.30 but a nonlinear effect for δ>0.30. These results, together with previous doping data, show a possible non-rigidity of the electron bands of the compounds, based on which previous phenomenological models of the pressure effect on T_c are built, and thus suggest only a restricted universality for the inverse parabolic relation between T_c and charge carriers per CuO₂-layer. In other words, factors in addition to charge carriers can affect high temperature superconductivity.

Original language	English
Pages (from-to)	393-396
Number of pages	4
Journal	Journal of Superconductivity
Volume	8
Issue number	4
DOIs	https://doi.org/10.1007/BF00722813
Publication status	Published - 1995 Aug

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

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10.1007/BF00722813

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abstract = "We have observed a δ-independent linear pressure effect on Tc of HgBa2CuO4+δ under hydrostatic pressures up to 1.7 GPa for δ≤0.30 but a nonlinear effect for δ>0.30. These results, together with previous doping data, show a possible non-rigidity of the electron bands of the compounds, based on which previous phenomenological models of the pressure effect on Tc are built, and thus suggest only a restricted universality for the inverse parabolic relation between Tc and charge carriers per CuO2-layer. In other words, factors in addition to charge carriers can affect high temperature superconductivity.",

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AU - Chu, C. W.

AU - Cao, Y.

AU - Xiong, Q.

AU - Xue, Y. Y.

PY - 1995/8

Y1 - 1995/8

N2 - We have observed a δ-independent linear pressure effect on Tc of HgBa2CuO4+δ under hydrostatic pressures up to 1.7 GPa for δ≤0.30 but a nonlinear effect for δ>0.30. These results, together with previous doping data, show a possible non-rigidity of the electron bands of the compounds, based on which previous phenomenological models of the pressure effect on Tc are built, and thus suggest only a restricted universality for the inverse parabolic relation between Tc and charge carriers per CuO2-layer. In other words, factors in addition to charge carriers can affect high temperature superconductivity.

AB - We have observed a δ-independent linear pressure effect on Tc of HgBa2CuO4+δ under hydrostatic pressures up to 1.7 GPa for δ≤0.30 but a nonlinear effect for δ>0.30. These results, together with previous doping data, show a possible non-rigidity of the electron bands of the compounds, based on which previous phenomenological models of the pressure effect on Tc are built, and thus suggest only a restricted universality for the inverse parabolic relation between Tc and charge carriers per CuO2-layer. In other words, factors in addition to charge carriers can affect high temperature superconductivity.

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δ-Influence on the pressure-effect on T_c of HgBa₂CuO_4+δ and the inverse parabolic T_c-relation

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