Quantum creep in a Bi2Sr2CaCu2Ox single crystal

✍ Scribed by K. Aupke; T. Teruzzi; P. Visani; A. Amann; A.C. Mota; V.N. Zavaritsky

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 225 KB
• Volume: 209
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(93)90918-g

✦ Synopsis

According to the theory of quantum collective creep (QCC) of Blatter, Geshkenbein and Vinokur, the quantum creep rate is enhanced in superconductors with short coherence length ~, high normal state resistivity Pn, weak collective pinning and strong anisotropy. We have investigated quantum tunneling in a single crystal of the highly anisotropic Bi2Sr2CaCu2Ox. In the configuration with the external field parallel to the c-axis we measure tunneling rates at T = 7 mK which are a factor of 4 to 5 higher than our previous measurements in Y1Ba2Cu4Oy.