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Phys. Rev. Lett. 99, 067004 (2007) [4 pages]

Proposed Design of a Josephson Diode

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Jiangping Hu1, Congjun Wu2,3, and Xi Dai4,5
1Department of Physics, Purdue University, West Lafayette, Indiana, USA
2Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California, USA
3Department of Physics, University of California, San Diego, California, USA
4Institute of Physics, Chinese Academy of Sciences, Beijing, China
5Department of Physics, and Center of Theoretical and Computational Physics, the University of Hong Kong, Hong Kong

Received 1 April 2007; published 9 August 2007

We propose a new type of Josephson junction formed by two superconductors close to the superconductor–Mott-insulator transition, one of which is doped with holes and the other is doped with electrons. A self-organized Mott-insulating depletion region is formed at the interface between two superconductors, giving rise to an asymmetric response of current to the external voltage. The collective excitations of the depletion region result in a novel phase dynamics that can be measured experimentally in the noise spectrum of the Josephson current.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.067004
DOI:
10.1103/PhysRevLett.99.067004
PACS:
85.25.−j, 73.43.Nq, 74.81.Fa
 
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