scholarly journals Majorana fermions and odd-frequency Cooper pairs in a normal-metal nanowire proximity-coupled to a topological superconductor

2013 ◽  
Vol 87 (10) ◽  
Author(s):  
Yasuhiro Asano ◽  
Yukio Tanaka
Keyword(s):  
Normal Metal ◽  
Majorana Fermions ◽  
Cooper Pairs ◽  
Topological Superconductor ◽  
Metal Nanowire

scholarly journals Evidence of Majorana fermions in the noise characteristic of normal metal–topological superconductor junctions

2020 ◽  
Vol 229 (4) ◽  
pp. 577-592
Author(s):  
Thibaut Jonckheere ◽  
Jérôme Rech ◽  
Laurent Raymond ◽  
Alex Zazunov ◽  
Reinhold Egger ◽  
...  
Keyword(s):  
Noise Characteristic ◽  
Normal Metal ◽  
Majorana Fermions ◽  
Topological Superconductor

scholarly journals Finite frequency noise in a normal metal–topological superconductor junction

2019 ◽  
Vol 99 (10) ◽  
Author(s):  
D. Bathellier ◽  
L. Raymond ◽  
T. Jonckheere ◽  
J. Rech ◽  
A. Zazunov ◽  
...  
Keyword(s):  
Normal Metal ◽  
Frequency Noise ◽  
Finite Frequency ◽  
Topological Superconductor

scholarly journals Transport in a hybrid normal metal/topological superconductor Kondo model

2014 ◽  
Vol 90 (19) ◽  
Author(s):  
Razvan Chirla ◽  
I. V. Dinu ◽  
V. Moldoveanu ◽  
Cătălin Paşcu Moca
Keyword(s):  
Normal Metal ◽  
Kondo Model ◽  
Topological Superconductor

scholarly journals Conversion of a conventional superconductor into a topological superconductor by topological proximity effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
C. X. Trang ◽  
N. Shimamura ◽  
K. Nakayama ◽  
S. Souma ◽  
K. Sugawara ◽  
...  
Keyword(s):  
Proximity Effect ◽  
Energy Gap ◽  
Majorana Fermions ◽  
Cooper Pairs ◽  
Superconducting Transition ◽  
Topological Superconductors ◽  
Alternative Approach ◽  
Properties Of Materials ◽  
Topological Proximity ◽  
Conventional Superconductor

AbstractRealization of topological superconductors (TSCs) hosting Majorana fermions is a central challenge in condensed-matter physics. One approach is to use the superconducting proximity effect (SPE) in heterostructures, where a topological insulator contacted with a superconductor hosts an effective p-wave pairing by the penetration of Cooper pairs across the interface. However, this approach suffers a difficulty in accessing the topological interface buried deep beneath the surface. Here, we propose an alternative approach to realize topological superconductivity without SPE. In a Pb(111) thin film grown on TlBiSe2, we discover that the Dirac-cone state of substrate TlBiSe2 migrates to the top surface of Pb film and obtains an energy gap below the superconducting transition temperature of Pb. This suggests that a Bardeen-Cooper-Schrieffer superconductor is converted into a TSC by the topological proximity effect. Our discovery opens a route to manipulate topological superconducting properties of materials.

scholarly journals Shape of Cooper pairs in a normal-metal/superconductor junction

2008 ◽  
Vol 77 (22) ◽  
Author(s):  
Yukio Tanaka ◽  
Yasuhiro Asano ◽  
Alexander A. Golubov
Keyword(s):  
Normal Metal ◽  
Cooper Pairs

scholarly journals Polygon sign rules of Majorana fermions in two-dimensional topological superconductors

2016 ◽  
Vol 30 (27) ◽  
pp. 1650213
Author(s):  
Qiu-Bo Cheng ◽  
Jing He ◽  
Jing Yu ◽  
Xiao-Ming Zhao ◽  
Su-Peng Kou
Keyword(s):  
Quantum Computation ◽  
Numerical Approach ◽  
Majorana Fermions ◽  
Two Dimensional ◽  
Line Defect ◽  
Topological Superconductor ◽  
Topological Superconductors ◽  
Topological Quantum ◽  
Different Types ◽  
Topological Quantum Computation

Recently, Majorana fermions (MFs) have attracted intensive attention due to their exotic statistics and possible applications in topological quantum computation. They are proposed to exist in various two-dimensional (2D) topological systems, such as [Formula: see text] topological superconductor (SC) and nanowire–superconducting hybridization system. In this paper, we point out that Majorana fermions in different topological systems obey different types of polygon sign rules. A numerical approach is described to identify the type of polygon sign rule of the Majorana fermions. Applying the approach to study two 2D topological systems, we find that vortex-induced Majorana fermions obey topological polygon sign rule and line-defect-induced Majorana fermions obey normal polygon sign rule.

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