Asymmetric Andreev reflection induced electrical and thermal Hall-like effects in metal/anisotropic superconductor junctions

Ren, Jie; Zhu, Jian‐Xin

doi:10.1103/physrevb.89.064512

Cited by 5 publications

(7 citation statements)

References 31 publications

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“…In this context, another interesting proposal is an Al DC SQUID with a non-negligible inductance L. For significant values of L, the temperature interference pattern generated by the SQUID should exhibit a remarkable hysteresis, that could be used to obtain a thermal memory device [71,72]. Furthermore, caloritronic superconducting circuits might be combined with hybrid platforms based on, e.g., semiconducting nanowires [73,74], graphene [64,75,76], ferromagnets or ferromagnetic insulators (FI) [77][78][79][80], topological insulators [81][82][83][84][85] or low dimensional electronic devices to enhance their functionalities. For instance, Ref.…”

Section: Applications and Future Directionsmentioning

confidence: 99%

“…Finally, phase-coherent caloritronics can shed light on several fundamental energy-and heat-related phenomena at the nanoscale, such as quantum thermodynamics [86], heat transport in topological states of matter [81][82][83][84][85] and give rise to phase-coherent thermoelectric effects in superconducting hybrid circuits [87][88][89].…”

Section: Applications and Future Directionsmentioning

confidence: 99%

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Towards phase-coherent caloritronics in superconducting circuits

2017

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The emerging field of phase-coherent caloritronics (from the Latin word "calor", i.e., heat) is based on the possibility to control heat currents using the phase difference of the superconducting order parameter. The goal is to design and implement thermal devices able to master energy transfer with a degree of accuracy approaching the one reached for charge transport by contemporary electronic components. This can be obtained by exploiting the macroscopic quantum coherence intrinsic to superconducting condensates, which manifests itself through the Josephson and the proximity effect. Here, we review recent experimental results obtained in the realization of heat interferometers and thermal rectifiers, and discuss a few proposals for exotic non-linear phase-coherent caloritronic devices, such as thermal transistors, solid-state memories, phase-coherent heat splitters, microwave refrigerators, thermal engines and heat valves. Besides being very attractive from the fundamental physics point of view, these systems are expected to have a vast impact on many cryogenic microcircuits requiring energy management, and possibly lay the first stone for the foundation of electronic thermal logic.In the last decades, the impressive evolution of modern electronics has reached a point where quantum effects and phase coherence are ordinarily exploited to study exotic phenomena at the nanoscale under controlled and adjustable conditions. Only very recently, instead, scientists have started to exploit the great potentialities offered by nanotechnology for the investigation and control of heat currents (the branch of science called "caloritronics"). Interesting advances in the understanding of fundamental properties of thermal transport have been obtained in experiments involving atomic or molecular junctions [1]. A few works [2][3][4] have shown that heat flow has a quantum limit -just as the electric current -and that this limit does not depend on the nature of heat carriers. Furthermore, a remarkable amount of theoretical and experimental studies has been focused on the interaction between heat and spin currents in thermoelectric devices [5].From the point of view of applications, the largest effort has been put into electronic and phononic thermometry or refrigeration [6][7][8], but the most intriguing and ambitious goal has always been the full control of heat currents, aiming to emulate the accuracy regularly obtained for charge transport in modern electronic devices. This attracting possibility was first envisioned by a conspicuous amount of theoretical works designing non-linear phononic devices [9]. However, the practical realization of these structures still appears challenging, hampering significant improvements of the first promising results [10,11]. An appealing alternative is represented by the notable ingredient of phase coherence, whose role in thermal transport was almost unknown until ten years ago, with just the exceptions of Refs. 12-14. This gap was filled by the birth of phase-coherent caloritronics [3,15,16]...

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Section: Applications and Future Directionsmentioning

confidence: 99%

Section: Applications and Future Directionsmentioning

confidence: 99%

Towards phase-coherent caloritronics in superconducting circuits

2017

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“…Among the hybrid structures, the Josephson junctions /JJ/ have the most intriguing properties. Zygmunt Bak Z.bak@ajd.czest.pl 1 Institute of Physics, Jan Dlugosz University, 42-200 Czestochowa, Poland While charge transport across Josephson junction is reasonably well understood [2], less attention has been given to the spin currents associated with JJ. However, when the perspective of future applications in quantronic/spintronic devices is given consideration, the latter (spin currents associated with JJ) increases in importance over the better known charge transport across JJ.…”

Section: Introductionmentioning

confidence: 99%

“…Concern with both generation and control of spin polarized currents is a fundamental spintronic topic. Because the numerous applications of hybrid structures have been on spintronic devices, focus has been mainly on transport phenomena, spin and charge current, both across and along the potential barriers [1]. Among the hybrid structures, the Josephson junctions /JJ/ have the most intriguing properties.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Andreev Reflection and Spin Hall Resonance at the Josephson Junctions

Ba̧k

2015

J Supercond Nov Magn

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The spin Hall effect offers a promising way to create new functionalities of spintronic devices. Our focus is on electron transport across Josephson junction whenever skew scattering at interface has a sizable effect. The fundamental finding of our study leads to the prediction of a new resonance at Josephson junction, which should result in a fluctuation in transport properties. Finally, we prove that proper interface profile of the Josephson junction can create counterparts of the "spin optics" as well as phenomena of skew scattering.

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“…In analogy to electric diodes as the primary building block in the electronics industry, thermal diode or rectifier becomes crucial in managing heat flow by changing heat current magnitude with the reversal of temperature bias. Thermal rectification has been reported in various systems such as magnonic junction 4 , spin Seebeck engine 5,6 , topological insulator-superconductor junction 7 , normal metalsuperconductor junction [8][9][10] , near field raditative heat transfer 13 , geometric asymmetric structures [14][15][16][17] , etc.. Heat current can be transferred via different types of energy carriers 18,19 , such as magnons [4][5][6] , electrons [7][8][9][10][11][12] , photons 13,20 , phonons 21 , acoustic wave 22,23 , and etc.. Regardless of the type of the junctions and energy carriers, the key ingredient required for achieving thermal rectification is structural asymmetry 24 .…”

Section: Introductionmentioning

confidence: 99%

Thermal rectification in a double quantum dots system with a polaron effect

2018

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We investigate the rectification of heat current carried by electrons through a double quantum dot (DQD) system under a temperature bias. The DQD can be realized by molecules such as suspended carbon nanotube and be described by the Anderson-Holstein model in presence of electron-phonon interaction. Strong electron-phonon interaction can lead to formation of polaronic states in which electronic states are dressed by phonon cloud. Dressed tunneling approximation (DTA), which is nonperturbative in dealing with strong electron-phonon interaction, is employed to obtain the heat current expression. In DTA, self-energies are dressed by phonon cloud operator and are temperature dependent. The temperature dependency of imaginary part of dressed retarded self-energy gives rise to the asymmetry of the system and is the necessary condition of thermal rectification. On top of this, one can either tune DQD effective energy levels such that |ǭ1| = |ǭ2| or have asymmetric dotlead couplings to achieve thermal rectification. We numerically find that increasing electron-phonon coupling and reducing inter dot coupling can both improve thermal rectification effect, while the electronic heat current is reduced.

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Asymmetric Andreev reflection induced electrical and thermal Hall-like effects in metal/anisotropic superconductor junctions

Cited by 5 publications

References 31 publications

Towards phase-coherent caloritronics in superconducting circuits

Towards phase-coherent caloritronics in superconducting circuits

Asymmetric Andreev Reflection and Spin Hall Resonance at the Josephson Junctions

Thermal rectification in a double quantum dots system with a polaron effect

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