Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 29: Superconductivity: Mechanisms, Phase Diagram, Competing Order

TT 29.11: Vortrag

Donnerstag, 28. Februar 2008, 12:30–12:45, H 3010

Magnetic Flux Periodicity of h/e in Superconducting Loops — •Florian Loder¹, Thilo Kopp¹, Arno Kampf¹, Jochen Mannhart¹, Christof Schneider¹, and Yuri Barash² — ¹EKM, Institut für Physik, Universität Augsburg, 86135 Augsburg — ²Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia

We apply the BCS theory to superconducting rings with unconventional order parameter symmetries. An external magnetic flux changes the character of the states in the condensate; as a consequence the energy of the superconducting ground state varies with a flux period of h/e. This h/e periodicity is caused by the flux-induced reconstruction of the supercurrent carrying condensate.

To be published in Nature Physics (2008)