Theoretical study of ac Josephson effect in a double barrier Josephson junction

2008 ◽  
Vol 468 (15-20) ◽  
pp. 1907-1909 ◽  
Author(s):  
S. Hikino ◽  
M. Mori ◽  
S. Takahashi ◽  
S. Maekawa
Keyword(s):  
Josephson Junction ◽  
Josephson Effect ◽  
Theoretical Study ◽  
Double Barrier

scholarly journals Revealing the interference effect of Majorana fermions in a topological Josephson junction

2018 ◽  
Vol 9 ◽  
pp. 520-529 ◽  
Author(s):  
Jie Liu ◽  
Tiantian Yu ◽  
Juntao Song
Keyword(s):  
Josephson Junction ◽  
Interference Effect ◽  
Josephson Effect ◽  
Andreev Reflection ◽  
Local Density ◽  
Localized States ◽  
Majorana Fermions ◽  
Local Density Of States ◽  
Single Side ◽  
Period Oscillation

We study theoretically the local density of states (DOS) in a topological Josephson junction. We show that the well-known 4π Josephson effect originates from the interference effect between two Majorana fermions (MFs) that are localized at the Josephson junction. In addition, the DOS for electrons (holes) shows the 4π interference information along each parity conserved energy spectrum. The DOS displays a 2π period oscillation when two trivial states interfere with each other. This means that the DOS information may be used to distinguish the MFs from trivial localized states. We suggest that the interference effect and the DOS can be detected by using two STM leads or two normal leads. A single side lead can only detect the Andreev reflection tunneling process in the junction, which cannot reveal information about the interference effect in general. However, using two side leads, we can reveal information about the interference effect of the MFs as well as the DOS by combining Andreev reflection with the electron transmission process.

Observation of a.c. Josephson effect in gate tunable Josephson junction on topological insulator (Bi0.2Sb0.8)2 Te3 films

2019 ◽  
Author(s):  
Yuusuke Takeshige ◽  
Sadashige Matsuo ◽  
Russell Stewart Deacon ◽  
Kento Ueda ◽  
Yosuke Sato ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Topological Insulator ◽  
Josephson Effect

scholarly journals A Novel Treatment of the Josephson Effect

2021 ◽  
Author(s):  
Jacob Szeftel ◽  
Nicolas Sandeau ◽  
Michel Abou Ganthous
Keyword(s):  
Radio Frequency ◽  
Josephson Junction ◽  
Thermal Equilibrium ◽  
Josephson Effect ◽  
Negative Resistance ◽  
Persistent Currents ◽  
Novel Treatment ◽  
Rf Signal ◽  
Bound Electrons

A new picture of the Josephson effect is devised. The radio-frequency (RF) signal, observed in a Josephson junction, is shown to stem from bound electrons, tunneling periodically through the insulating film. This holds also for the microwave mediated tunneling. The Josephson effect is found to be conditioned by the same prerequisite worked out previously for persistent currents, thermal equilibrium and occurence of superconductivity. The observed negative resistance behaviour is shown to originate from the interplay between the normal and superconducting currents.

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