Ebisu, Hiromi and Lu, Bo and Klinovaja, Jelena and Tanaka, Yukio. (2016) Theory of timereversal topological superconductivity in double Rashba wires: symmetries of Cooper pairs and Andreev bound states. Progress of Theoretical and Experimental Physics, 8. 083I01.

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Abstract
We study the system of double Rashba wires brought into proximity to an swave superconductor. Timereversal invariant topological superconductivity is realized if the interwire pairing, corresponding to a crossed Andreev reflection, dominates over the standard intrawire pairing. We classify the symmetry of the Cooper pairs focusing on four degrees of freedom, i. e., frequency, spin, spatial parity inside wires, and spatial parity between wires. The presence of the spatial parity between wires is a unique feature of this model. The magnitude of the oddfrequency pairing is strongly enhanced in the topological state irrespective of spatial parities. We also explore the properties of junctions occurring in such doublewire systems. If one section of the junction is in a topological state and the other is in a trivial state, the energy dispersion of the Andreev bound states is proportional to similar to +/ sin phi, where phi denotes the macroscopic phase difference between the two sections. This behavior can be intuitively explained by the couplings of a Kramers pair of Majorana fermions and a spinsinglet swave Cooper pair and can also be understood by analyzing an effective continuum model of the s + p/swave superconductor hybrid system.
Faculties and Departments:  05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja) 

UniBasel Contributors:  Klinovaja, Jelena 
Item Type:  Article, refereed 
Article Subtype:  Research Article 
Publisher:  Oxford University Press 
eISSN:  20503911 
Note:  Publication type according to Uni Basel Research Database: Journal article 
Language:  English 
Identification Number: 

Last Modified:  20 Feb 2017 09:45 
Deposited On:  20 Feb 2017 09:44 
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