Vanishing of phase coherence in underdoped Bi_2Sr_2CaCu_2O_8+d

Abstract

Coherent time-domain spectroscopy is used to measure the screening and dissipation of high-frequency electromagnetic fields in a set of underdoped Bi_2Sr_2CaCu_2O_8+d thin films. The measurements provide direct evidence for a phase-fluctuation driven transition from the superconductor to normal state, with dynamics described well by the Berezinskii-Kosterlitz-Thouless theory of vortex-pair unbinding.

Nature, Vol. 398, 18 March 1999, pg. 221 4 pages with 4 included figures

Cited by in corpus (319)

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