Macroscopic quantum tunneling in a d-wave high-TC Bi2Sr2CaCu2O8+δ superconductor

K. Inomata, S. Sato, Koji Nakajima, A. Tanaka, Y. Takano, H. B. Wang, M. Nagao, H. Hatano, S. Kawabata

Research output: Contribution to journalArticlepeer-review

177 Citations (Scopus)


While Josephson-junction-like structures intrinsic to the layered cuprate high temperature superconductors offer an attractive stage for exploiting possible applications to new quantum technologies, the low energy quasiparticle excitations characteristically present in these d-wave superconductors may easily destroy the coherence required. Here we demonstrate for the first time the feasibility of macroscopic quantum tunneling in the intrinsic Josephson junctions of a high temperature superconductor Bi2Sr2CaCu2O8+δ, and find it to be characterized by a high classic-to-quantum crossover temperature and a relatively weak quasiparticle dissipation.

Original languageEnglish
Article number107005
JournalPhysical review letters
Issue number10
Publication statusPublished - 2005 Sep 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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