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We describe here the first experimental realization of a heat interferometer, thermal counterpart of the well-known superconducting quantum interference device (SQUID). These findings demonstrate, on the first place, the existence of…

超导电性 · 物理学 2014-05-09 M. J. Martínez-Pérez , P. Solinas , F. Giazotto

The thermoelectric coefficient $\eta(T)$ in unconventional superconductors is enhanced below $T_c$ by intermediate strength impurity scattering that is intrinsically particle-hole asymmetric. We compute $\eta(T)$ for a strong-coupling…

超导电性 · 物理学 2009-11-11 Mikael Fogelstrom , Tomas Lofwander

We propose the two-band s-d model to describe theoretically a diffuse regime of the spin-dependent electron transport in magnetic tunnel junctions (MTJ's) of the form F/O/F where F's are 3d transition metal ferromagnetic layers and O is the…

材料科学 · 物理学 2009-11-07 D. Bagrets , A. Bagrets , A. Vedyayev , B. Dieny

We consider a normal metal - superconductor (N-S) junction in the regime, when electrons in the normal metal are driven out of equilibrium. We show that the non-equilibrium fluctuations of the electron density in the N-layer cause the…

介观与纳米尺度物理 · 物理学 2009-10-31 B. N. Narozhny , I. L. Aleiner , B. L. Altshuler

We study, both theoretically and experimentally, the features on the current-voltage characteristic of a highly transparent Josephson junction caused by transition of the superconducting leads to the normal state. These features appear due…

The cuprate high-temperature superconductors are known to host a wide array of effects due to interactions and disorder. In this work, we look at some of the consequences of these effects which can be visualized by scanning tunneling…

超导电性 · 物理学 2018-10-02 Miguel Antonio Sulangi , Jan Zaanen

We analyze non-local effects in electron transport across three-terminal normal-superconducting-normal (NSN) structures. Subgap electrons entering S-electrode from one N-metal may form Cooper pairs with their counterparts penetrating from…

超导电性 · 物理学 2007-06-13 Mikhail S. Kalenkov , Andrei D. Zaikin

We report on the fabrication and measurements of planar mesoscopic Josephson junctions formed by InAs nanowires coupled to superconducting Nb terminals. The use of Si-doped InAs-nanowires with different bulk carrier concentrations allowed…

介观与纳米尺度物理 · 物理学 2012-05-11 H. Y. Gunel , I. E. Batov , H. Hardtdegen , K. Sladek , A. Winden , K. Weis , G. Panaitov , D. Gruetzmacher , Th. Schaepers

We have observed back-bending structures at high bias current in the current-voltage curves of intrinsic Josephson junctions. These structures may be caused by nonequilibrium quasiparticle injection and/or Joule heating. The energy gap…

超导电性 · 物理学 2009-11-10 L. X. You , P. H. Wu , J. Chen , W. W. Xu , K. Kajiki , S. Watauchi , I. Tanaka

We investigate the evolution of the cross-plane thermal conductivity $\kappa$ of superlattices (SLs) as interfaces change from perfectly abrupt to totally intermixed, by using non-equilibrium molecular dynamics simulations in combination…

材料科学 · 物理学 2019-08-19 Xiaolong Yang , Wu Li

We investigate the proximity effect in junctions between $N=3$ superconductors under commensurate voltage bias. The bias is chosen to highlight the role of transport processes that exchange multiple Cooper pairs coherently between more than…

介观与纳米尺度物理 · 物理学 2017-06-01 Ciprian Padurariu , Thibaut Jonckheere , Jérôme Rech , Thierry Martin , Denis Feinberg

We study disordered Josephson junctions arrays with long-range interaction and charging effects. The model consists of two orthogonal sets of positionally disordered $N$ parallel filaments (or wires) Josephson coupled at each crossing and…

凝聚态物理 · 物理学 2016-08-15 T. K. Kopeć , J. V. José

Proximity-induced superconductivity in three dimensional (3D) topological insulators forms a new quantum phase of matter and accommodates exotic quasiparticles such as Majorana bound states. One of the biggest drawbacks of the commonly…

We study the quantum phase transitions in two-dimensional arrays of Josephson-couples junctions with short range Josephson couplings (given by the Josephson energy) and the charging energy. We map the problem onto the solvable quantum…

超导电性 · 物理学 2009-11-11 T. P. Polak , T. K. Kopec

We study non-Hermitian Josephson junctions formed by superconductors with a finite phase difference under non-Hermiticity, which naturally appears due to coupling to normal reservoirs. Depending on the structure of non-Hermiticity, captured…

超导电性 · 物理学 2024-11-13 Jorge Cayao , Masatoshi Sato

We explore the behavior of the ac admittance of superconductor-normal metal-superconductor (SNS) junctions as the phase difference of the order parameters between the superconductors is varied. We find three characteristic regimes, defined…

超导电性 · 物理学 2011-04-21 Pauli Virtanen , F. Sebastián Bergeret , Juan Carlos Cuevas , Tero T. Heikkilä

Surface scattering of free electrons strongly modifies the electromagnetic response near the interface. Due to the inherent anisotropy of the surface scattering that necessarily reverses the normal the interface component of the electron…

光学 · 物理学 2018-07-11 Evgenii E. Narimanov

Wide mesoscopic superconducting - normal-metal - superconducting (S-N-S) junctions exhibit Andreev bound states which carry substantial supercurrents, even at temperatures for which the equilibrium Josephson effect is exponentially small…

介观与纳米尺度物理 · 物理学 2008-02-03 Nathan Argaman

Superconductor-Ferromagnetic-Superconductor (SFS) Josephson junctions are known to exhibit a transition between $\pi$ and 0 states. In this note we find the $\pi-0$ phase diagram of an SFS junction depending on the transparency of an…

介观与纳米尺度物理 · 物理学 2009-11-07 N. M. Chtchelkatchev , W. Belzig , Yu. V. Nazarov , C. Bruder

We study Josephson junctions between superconductors connected through the helical edge states of a two-dimensional topological insulator in the presence of a magnetic barrier. As the equilibrium Andreev bound states of the junction are…

介观与纳米尺度物理 · 物理学 2015-05-30 Driss M. Badiane , Manuel Houzet , Julia S. Meyer