Resonant andreev reflection

Author: wysk

August undefined, 2024

Andreev reflection (AR), named after the Russian physicist Alexander F. Andreev, is a type of particle scattering which occurs at interfaces between a superconductor (S) and a normal state material (N). It is a charge-transfer process by which normal current in N is converted to supercurrent in S. Each Andreev reflection transfers a charge 2e across the interface, avoiding the forb… WebWe first consider the single-lead case by setting t 2 to zero in Fig. 1. We show that Majorana fermions induce resonant Andreev reflections from the lead to the grounded superconductor and result in highly nonlinear I-V curve which is a set of steps. At small voltage, the conductance from the lead to the superconductor is 0.However, the presence …

[2210.04408] Andreev processes in mesoscopic multi-terminal …

WebFeb 1, 1999 · We investigate the electron tunneling through a normal-metal--quantum-dot--superconductor (N-QD-S) system where multiple discrete levels of the QD are considered. … WebWe investigate electronic transport through a vibrating quantum dot coupled to a normal and a superconducting lead. It is shown that in such a system, the interplay of Cooper pairs and phonons gives rise to phonon-assisted Andreev tunnelings. These tunnelings manifest themselves as resonant peaks separated by a half of the phonon energy in the current as … seraph jewelry and more

Correlated spin currents generated by resonant-crossed Andreev ...

WebResonant Andreev reflection in a normal-metal–quantum-dot–superconductor system Author(s) Sun, Q; Wang, J; Lin, TH ... resonant Andreev reﬂections which depend upon … WebDec 2, 2015 · Alternatively, it has also been predicted that extraordinary temperature dependence of the resonant Andreev reflection peak is expected in N/quantum-dot/S systems 30, the tunneling mediated by discrete energy levels being responsible for an anomalous broadening of the conductance peak with respect the thermal one. WebDec 2, 2009 · If a lead couples to the Majorana fermions through electron tunneling, the Majorana fermions induce resonant Andreev reflections from the lead to the grounded … the tale of genji definition

Phys. Rev. B 84, 115420 (2011) - Resonant nonlocal Andreev reflection …

Resonant Andreev reflection in a normal-metal/quantum-dot ...

Web10/2012 - Present : Postdoctoral Research Associate at the University of Basel (Switzerland), in the group of Prof. Dr. Daniel Loss: 09/2009 - 08/2012: Postdoctoral Fellow at the Weizmann Institute of Science (Israel), in the group of Prof. Yuval Gefen: 08/2003 - 08/2009 WebApr 11, 2024 · In addition, the energy location and range of crossed Andreev reflection and elastic co-tunneling can be controlled by the staggered potential and the exchange field. Our results suggest that the device can implement light and exchange field control of the Andreev reflection process and the spin-valley switch. seraphivtWebJul 10, 2009 · We describe experimental signatures of Majorana fermion edge states, which form at the interface between a superconductor and the surface of a topological insulator. … seraphite brute

"WebJan 31, 2024 · limit of a highly transparent interface, and Andreev reﬂection was possible due to evanescent single-electron excitations in the SC. With a many-body approach, we … " - Resonant andreev reflection

Resonant andreev reflection

(PDF) Resonant multiple Andreev reflections in mesoscopic ...

WebFeb 9, 2024 · Title: Photon-assisted resonant Andreev reflections: Yu-Shiba-Rusinov and Majorana states. Authors: ... subgap states in superconductors in the limit of small … WebApr 12, 2024 · We find that the RCSJ model successfully reproduces the observed multiplet features. Therefore, our study suggests that differential resistance measurements alone are insufficient to conclusively distinguish resonant Andreev reflection processes from semiclassical circuit-network effects.

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WebAug 10, 2024 · Abstract We investigate the Andreev reflection across a graphene-based superconducting junction irradiated by the linearly polarized off-resonant light. The band structure of graphene is modified by the linearly polarized light, which leads to the anisotropic band structure of graphene. In the coaction of the linearly polarized light and … WebFor sketches at various additional bias voltages and high-frequency amplitudes, see Supplementary Fig. 8. from publication: Resonant Andreev reflections probed by photon-assisted tunnelling at the ...

WebFeb 14, 2024 · We develop a new theoretical approach for modelling a wide range of semiconductor-superconductor structures with arbitrary potential barriers and a spatially-dependent superconducting order parameter. We demonstrate asymmetry in the conductance spectrum as a result of a Schottky barrier shape. We further show that … WebJun 25, 2004 · oﬀ-resonance of the Andreev reﬂection, resp ectiv ely. The impurit y , suc h a s the substitutional b oron (nitrogen) and the v a cancy , can greatly c hange the electronic structure of the ...

WebMar 24, 2014 · Andreev reflection of quasiparticle excitations provides a sensitive and passive probe of flow in superfluid 3He-B. ... In practice, the resonators are usually driven … WebAug 1, 2024 · By using Floquet theory for periodically driven quantum systems [22], [23], we obtain an effective Hamiltonian which indicates the modification of band structure of the 8-Pmmn borophene, and then the light becomes an effective method to tune the Andreev reflection. The off-resonant light-modulated electronic properties of 2D materials, such as …

WebSep 15, 2011 · We theoretically investigate the Andreev reflection process in a quantum spin Hall insulator strip touching on an s-wave superconductor, taking into account the …

WebJun 20, 2024 · Among the earliest examples is Andreev reflection of an electron into a retro-reflected hole at a normal-superconducting interface. ... (2024) Resonant Andreev reflections probed by photon-assisted tunnelling at the atomic scale, Nature Physics, 10.1038/s41567-020-0972-z, 16:12, (1222-1226), Online publication date: 1-Dec-2024. seraphite last of us 2WebQuasiparticles in inhomogeneous superconductors are subject to two off-diagonal forces. One, due to the gradient in the modulus of the pair potential, is responsible for electron - hole (Andreev) scattering; the other, recently discovered one results from the gauge invariant Cooper pair velocity of interface supercurrents and should be important in high field type … seraphionWeb[4] Z.-M. Yu, Y. Liu, Y. Yao, and S. A. Yang, Unconventional pairing induced anomalous transverse shift in Andreev reflection, Phys. Rev. Lett. 121, 176602 (2024). 该工作研究了普通金属和非传统超导界面处的Andreev反射，发现p波或d波超导可以独立导致反常横向位移的产生，而不需要体系具有自旋轨道耦合。 seraph key code farmWebApr 11, 2024 · In the past decades, the Andreev reflection (AR) phenomenon in graphene superconductors has also attracted extensive attention. 22 22. C. Bai and Y. Yang, “ Specular Andreev reflection in graphene-based superconducting junction with substate-induced spin orbit interaction,” Phys. Lett. A 380(37), 2947– 2952 (2016). the tale of genji character analysisWebResonant Andreev reflection in a normal-metal–quantum-dot–superconductor system Author(s) Sun, Q; Wang, J; Lin, TH ... resonant Andreev reﬂections which depend upon various fac-tors such as the bias, the level spacing of the QD, and the energy gap of the superconducting electrode. seraphite last of usWebApr 1, 2024 · MZM causes resonant Andreev reflection at low-bias limit, even when Zeeman splitting appears in the dot. • Magnetoresistance depends sensitively on magnetization-direction difference between the ferromagnetic lead and MZM. • The findings are helpful in understanding the MZM-driven Andreev reflections modulated by ferromagnetic lead. the tale of genji by murasaki shikibuWebNov 1, 1999 · Multiple Andreev reflections through a resonant level lead to an anomalous sub-harmonic gap structure due to the existence of the localized state in the QD. It will be also worth studying the effects of electron–electron interactions of the QD in Andreev transport, because the QD in general have strong interaction effects provided by … seraph login