Document Details

Document Type : Article In Journal 
Document Title :
Spontaneous movable semifluxons - New phenomenon arising in nano-electronic superconducting system
Spontaneous movable semifluxons - New phenomenon arising in nano-electronic superconducting system
 
Subject : Physics 
Document Language : English 
Abstract : Semifluxon is a very rare topological excitation. It is a spontaneous Josephson vortex carrying a half of the magnetic flux quantum φ0 created on the boundary between 0 and π junctions. Semifluxons play an important role as qubits for quantum computing. Typically they are static and arise in a variety of Josephson 0- π nano-junctions, in particular. The properties of semifluxons are very different from the properties of fluxon. Typically, semifluxons are pinned at the phase discontinuity point in 0- π long Josephson junctions (LJJ) and may have two polarities carrying the flux φ0/2, that was attracting to use them as qubits. In this paper, we report for a first time about a novel type of semifluxons arising in superconductors, which are movable, i.e. not pinned. We show that a spontaneous generation of movable semifluxons is created in conventional LJJ due to flux cloning in extended T-Josephson nano-junctions. We also show that there is a strong interaction between semifluxon and anti-semifluxon once they have been generated and that leads to their very short life time, i.e. to their fast annihilation and next recreation. 
ISSN : 1742-6588 
Journal Name : Journal of Physics: Conference Series 
Volume : 248 
Issue Number : 2010 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Saturday, October 29, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
هناء فرحان حسنFarhan-Hassan, Hanaa ResearcherDoctoratehfarhan@kau.edu.sa
F V KusmartsevKusmartsev, F VResearcherDoctorateF.Kusmartsev@lbro.ac.uk

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