Collapse of CuO Double Chains and Suppression of Superconductivity in High-Pressure Phase of YBa${}_2$Cu${}_4$O${}_8$

Abstract

The crystal structure and electrical resistivity of YBa${}_2$Cu${}_4$O${}_8$ (Y124) were studied under high pressure up to 18 GPa using diamond-anvil cells, respectively, in order to clarify its conduction mechanism. Y124 causes the first-order phase-transition into the orthorhombic Immm at pressure around 11 GPa. The high-pressure phase (HPP) also shows the superconductivity, while the manner of temperature dependence of electrical resistance and the pressure dependence of transition temperature, Tc, drastically change above 11 GPa. The CuO${}_2$ plane persists in HPP but the CuO double chains collapse with the phase transition and transform into three-dimensional Cu-O network, resulting in the renewal of conduction system.

arXiv comment11 pages, 4 figures, to be published in JPSJ

References in corpus (3)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Pressure-induced lattice instabilities and superconductivity in YBa2Cu4O8 and optimally doped YBa2Cu3O7-δ

Cited by in corpus (4)

• Sensitivity of $T_{\mathrm{c}}$ to pressure and magnetic field in the cuprate superconductor YBa${}_2$Cu${}_3$O${}_y$: evidence of charge order suppression by pressure
• Inverse correlation between quasiparticle mass and Tc in a cuprate high-Tc superconductor
• Pressure-induced phase transition and superconductivity in YBa2Cu4O8
• Nonmonotonic Pressure Dependence of the Lattice Parameter $a$ in the Quasi-one-dimensional Superconductor Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$