Induced Topological Superconductivity in a BiSbTeSe2-Based Josephson Junction

A 4 π -periodic supercurrent through a Josephson junction can be a consequence of the presence of Majorana bound states. A systematic study of the radio frequency response for several temperatures and frequencies yields a concrete protocol for examining the 4 π -periodic contribution to the supercurrent. This work also reports the observation of a 4 π -periodic contribution to the supercurrent in BiSbTeSe 2 -based Josephson junctions. As a response to irradiation by radio frequency waves, the junctions showed an absence of the first Shapiro step. At high irradiation power, a qualitative correspondence to a model including a 4 π -periodic component to the supercurrent is found.

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Detecting the Exchange Phase of Majorana Bound States in a Corbino Geometry Topological Josephson Junction

Physical Review Letters ◽

10.1103/physrevlett.115.246403 ◽

2015 ◽

Vol 115 (24) ◽

Cited By ~ 12

Author(s):

Sunghun Park ◽

Patrik Recher

Keyword(s):

Josephson Junction ◽

Bound States ◽

Majorana Bound States

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A topological Josephson junction platform for creating, manipulating, and braiding Majorana bound states

Annals of Physics ◽

10.1016/j.aop.2020.168326 ◽

2020 ◽

Vol 423 ◽

pp. 168326 ◽

Cited By ~ 1

Author(s):

Suraj S. Hegde ◽

Guang Yue ◽

Yuxuan Wang ◽

Erik Huemiller ◽

D.J. Van Harlingen ◽

...

Keyword(s):

Josephson Junction ◽

Bound States ◽

Majorana Bound States

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Supercurrent-induced Majorana bound states in a planar geometry

SciPost Physics ◽

10.21468/scipostphys.7.3.039 ◽

2019 ◽

Vol 7 (3) ◽

Cited By ~ 2

Author(s):

André Melo ◽

Sebastian Rubbert ◽

Anton Akhmerov

Keyword(s):

Josephson Junction ◽

Bound States ◽

Periodic Potential ◽

Spin Splitting ◽

Planar Geometry ◽

Spin Orbit Coupling ◽

Dimensional Electron ◽

Majorana Bound States ◽

Dimensional Electron Gas ◽

Breaking Time

We propose a new setup for creating Majorana bound states in a two-dimensional electron gas Josephson junction. Our proposal relies exclusively on a supercurrent parallel to the junction as a mechanism of breaking time-reversal symmetry. We show that combined with spin-orbit coupling, supercurrents induce a Zeeman-like spin splitting. Further, we identify a new conserved quantity—charge-momentum parity—that prevents the opening of the topological gap by the supercurrent in a straight Josephson junction. We propose breaking this conservation law by adding a third superconductor, introducing a periodic potential, or making the junction zigzag-shaped. By comparing the topological phase diagrams and practical limitations of these systems we identify the zigzag-shaped junction as the most promising option.

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Measurement of Chromatic Dispersion using the Baseband Radio-Frequency Response of a Phase-Modulated Analog Optical Link Employing a Reference Fiber

10.21236/ada472284 ◽

2007 ◽

Cited By ~ 1

Author(s):

Jason D. McKinney ◽

John Diehl

Keyword(s):

Radio Frequency ◽

Frequency Response ◽

Chromatic Dispersion ◽

Optical Link

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Topological isoconductance signatures in Majorana nanowires

Scientific Reports ◽

10.1038/s41598-021-96415-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

L. S. Ricco ◽

J. E. Sanches ◽

Y. Marques ◽

M. de Souza ◽

M. S. Figueira ◽

...

Keyword(s):

Quantum Dot ◽

Transport Properties ◽

Spin Polarization ◽

Bound States ◽

Spin Asymmetry ◽

Experimental Protocol ◽

Zero Bias ◽

Topological Superconductor ◽

Hybrid Device ◽

Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

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