Macroscopic Quantum Tunneling in a Bi2Sr2CaCu2O8+δ Single Crystalline Whisker

被引：11

作者：

Kubo, Yuimaru ^{[1
,2
,3
]}

Takahide, Yamaguchi ^{[3
]}

Ueda, Shinya ^{[4
]}

Takano, Yoshihiko ^{[3
]}

Ootuka, Youiti ^{[1
,2
]}

机构：

[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tsukuba, Tsukuba Res Ctr Interdisciplinary Mat Sci TIMS, Tsukuba, Ibaraki 3058571, Japan

[3] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

[4] Tokyo Univ Agr & Technol, Dept Appl Phys, Koganei, Tokyo 1848588, Japan

来源：

APPLIED PHYSICS EXPRESS | 2010年 / 3卷 / 06期

关键词：

T-C SUPERCONDUCTORS; JOSEPHSON-JUNCTIONS; STATES;

D O I：

10.1143/APEX.3.063104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Macroscopic quantum tunneling (MQT) has been observed in an intrinsic Josephson junction (IJJ) stack of a Bi2Sr2CaCu2O8+delta (BSCCO) single crystalline whisker with high precision using a home made setup. The cross-over temperature between thermal activation and MQT was about 260 mK, and the Josephson plasma frequency was estimated to be 86 GHz. Both the thermal escape theory and the MQT theory are consistent with the experiments. These facts strongly suggest that single crystalline BSCCO whiskers are high enough quality to be used as intrinsic Josephson quantum devices such as intrinsic Josephson phase qubits. This is the first demonstration of MQT in BSCCO single crystalline whiskers. (C) 2010 The Japan Society of Applied Physics

引用

页数：3

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