Superconductivity at 108 K in YBa2Cu4O8 at pressures up to 12 Gpa |
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| Authors: | E N Van Eenige R Grlessen R J Wijngaarden J Karpineki E Kaldis S Rusiecki |
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| Institution: | 1. Department of Physics and Astronomy of the , Free University , Amsterdam, 1081 HV, The Netherlands;2. Laboratorium fur Festk?rperphysik Eidgen?ssische Technische Hochschule , Zurich, CH-8093, Switzerland |
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| Abstract: | Abstract Resistive measurements in a cryogenic diamond anvil cell show that the T, of YBa2Cu4O8 can be increased by almost 30 K by applying a pressure of 12 GPa. The pressure derivative is, however, not constant. At p < 5 GPa, dTc/dp ～5 K/GPa. At higher pressures dTc/dp decreases gradually and Tc saturates at ～108 K. This behavior can be reproduced by a phenomenological model where T, depends only on the number of holes in the CuO2-planes. |
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