Shape and motion of vortex cores inBi2Sr2CaCu2O8+δ

Autor:	Ivan Maggio-Aprile, M. Kugler, Bart W. Hoogenboom, Oystein Fischer, Bernard Revaz, Christoph Renner
Rok vydání:	2000
Předmět:	Physics Condensed matter physics Position (vector) Condensed Matter::Superconductivity Scanning tunneling spectroscopy Motion (geometry) Pinning force Quantum tunnelling Vortex
Zdroj:	Physical Review B. 62:9179-9185
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.62.9179
Popis:	We present a detailed study on the behavior of vortex cores in Bi2Sr2CaCu2O8+δ using scanning tunneling spectroscopy. The very irregular distribution and shape of the vortex cores imply a strong pinning of the vortices by defects and inhomogeneities. The observed vortex cores seem to consist of two or more randomly distributed smaller elements. Even more striking is the observation of vortex motion where the vortex cores are divided between two positions before totally moving from one position to the other. Both effects can be explained by quantum tunneling of vortices between different pinning centers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::af7496f1f0b3a1a43fc453c17f07bf57 https://doi.org/10.1103/physrevb.62.9179 Zobrazit plný text záznamu