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Dresden 2020 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 41: Unconventional Superconductors

TT 41.7: Talk

Wednesday, March 18, 2020, 17:00–17:15, HSZ 201

Uniaxial stress dependence of the critical temperature of YBa2Cu3O6.67 — •Clifford Hicks1, Mark Barber1, Marcin Konczykowski2, Bernhard Keimer3, and Andrew Mackenzie11Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany — 2École Polytechnique, Paris, France — 3Max-Planck-Institut für Festkörperforschung

We use piezoelectric-based uniaxial pressure apparatus and GaAs/AlGaAs-based susceptometers to measure the stress dependence of the critical temperature of YBa2Cu3O6.67. Tc of the unstressed material is 65 K, and with compression along the a axis Tc decreases steadily. At a pressure of  1 GPa, long-correlation-length charge density wave order appears, and strong competition between this order and superconductivity causes a rapid suppression of Tc.

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