Volume 99, Number 2, July 2012
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||30 July 2012|
Enhanced Josephson tunneling between high-temperature superconductors through a normal pseudogap underdoped cuprate with a finite-energy cooperon
1 Department of Physics, and Center of Theoretical and Computational Physics, The University of Hong Kong Hong Kong, China
2 Department of Physics, South University of Science and Technology of China - Shenzhen, Guangdong, China
3 Institut für Theoretische Physik, ETH Zürich - CH-8093 Zürich, Switzerland
4 Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory Upton, NY 11973, USA
Received: 22 June 2012
Accepted: 5 July 2012
The Josephson coupling between optimally cuprate superconductors separated by a spacer with a finite-energy cooperon excitation, which contributes to the Josephson coupling strength, is examined. For an underdoped-cuprate barrier in its normal state, the YRZ model gives a good description of the temperature-dependent enhanced Josephson coupling. A detailed examination of the origin of the enhancement shows a significant contribution from the cooperon excitation which is comparable to that from nodal quasiparticles.
PACS: 42.65.-k – Nonlinear optics / 72.25.Dc – Spin polarized transport in semiconductors / 72.40.+w – Photoconduction and photovoltaic effects
© EPLA, 2012
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