Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions

Kawabata, Shiro; Vasenko, A. S.; Ozaeta, Asier; Bergeret, Sebastian; Hekking, F. W. J.

doi:10.1016/j.jmmm.2014.10.032

Cited by 7 publications

(4 citation statements)

References 55 publications

(71 reference statements)

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“…More advanced concepts include spin currents driven by microwave radiation [149], large thermophases in Josephson junctions [157][158][159], and phase-coherent thermoelectric transistors [160]. Spin filter tunnel junctions may also be used to improve the performance of NIS coolers [161].…”

Section: Discussionmentioning

confidence: 99%

Spin manipulation in nanoscale superconductors

Beckmann

2016

J. Phys.: Condens. Matter

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The interplay of superconductivity and magnetism in nanoscale structures has attracted considerable attention in recent years due to the exciting new physics created by the competition of these antagonistic ordering phenomena, and the prospect of exploiting this competition for superconducting spintronics devices. While much of the attention is focused on spin-polarized supercurrents created by the triplet proximity effect, the recent discovery of long range quasiparticle spin transport in high-field superconductors has rekindled interest in spin-dependent nonequilibrium properties of superconductors. In this review, the experimental situation on nonequilibrium spin injection into superconductors is discussed, and open questions and possible future directions of the field are outlined.

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Section: Discussionmentioning

confidence: 99%

Spin manipulation in nanoscale superconductors

Beckmann

2016

J. Phys.: Condens. Matter

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“…Rapid development of micro-and nano-fabrication methods facilitated the fabrication of devices and circuits with dimensions of the order of relaxation lengths of these nonequilibrium modes. The nonequilibrium quasiparticles might limit the performance of a variety of nanoscale superconducting devices with dimensions comparable to corresponding relaxation scales, such as refrigerators based on normal metal (N)-insulator (I)-superconductor (S) junctions [2][3][4][5][6][7], NIS refrigerators with a ferromagnetic (F) interlayer [8][9][10], superconducting resonators [11][12][13][14], superconducting qubits [15][16][17][18][19][20][21][22][23][24], single-electron hybrid turnstiles [25,26], SFS π-junctions [27][28][29][30], nanorings [31][32][33] and many other devices. The effect has been notoriously called quasiparticle poisoning.…”

Section: Introductionmentioning

confidence: 99%

Relaxation of nonequilibrium quasiparticles in mesoscopic size superconductors

Arutyunov

Chernyaev

Karabassov

et al. 2018

J. Phys.: Condens. Matter

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Rapid development of micro- and nanofabrication methods have provoked interest and enabled experimental studies of electronic properties of a vast class of (sub)micrometer-size solid state systems. Mesoscopic-size hybrid structures, containing superconducting elements, have become interesting objects for basic research studies and various applications, ranging from medical and astrophysical sensors to quantum computing. One of the most important aspects of physics, governing the behavior of such systems, is the finite concentration of nonequilibrium quasiparticles, present in a superconductor even well below the temperature of superconducting transition. Those nonequilibrium excitations might limit the performance of a variety of superconducting devices, like superconducting qubits, single-electron turnstiles and microrefrigerators. On the contrary, in some applications, like detectors of electromagnetic radiation, the nonequilibrium state is essential for their operation. It is therefore of vital importance to study the mechanisms of nonequilibrium quasiparticle relaxation in superconductors of mesoscopic dimensions, where the whole structure can be considered as an 'interface'. At early stages of research the problem was mostly studied in relatively massive systems and at high temperatures close to the critical temperature of a superconductor. We review the recent progress in studies of nonequilibrium quasiparticle relaxation in superconductors including the low temperature limit. We also discuss the open physical questions and perspectives of development in the field.

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“…Employing superconducting bilayers where both superconductors are exposed to strong external magnetic fields instead, resulting in Zeeman-split superconductors, was recently reported to further enhance these effects significantly 29 . Electron cooling in superconducting spin-filter junctions 30 31 and thermoelectric effects in superconducting quantum dot systems 32 have also been studied.…”

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confidence: 99%

Spin Seebeck effect and thermoelectric phenomena in superconducting hybrids with magnetic textures or spin-orbit coupling

Bathen

Linder

2017

Sci Rep

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We theoretically consider the spin Seebeck effect, the charge Seebeck coefficient, and the thermoelectric figure of merit in superconducting hybrid structures including either magnetic textures or intrinsic spin-orbit coupling. We demonstrate that large magnitudes for all these quantities are obtainable in Josephson-based systems with either zero or a small externally applied magnetic field. This provides an alternative to the thermoelectric effects generated in high-field (~1 T) superconducting hybrid systems, which were recently experimentally demonstrated. The systems studied contain either conical ferromagnets, spin-active interfaces, or spin-orbit coupling. We present a framework for calculating the linear thermoelectric response for both spin and charge of a system upon applying temperature and voltage gradients based on quasiclassical theory which allows for arbitrary spin-dependent textures and fields to be conveniently incorporated.

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Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions

Cited by 7 publications

References 55 publications

Spin manipulation in nanoscale superconductors

Spin manipulation in nanoscale superconductors

Relaxation of nonequilibrium quasiparticles in mesoscopic size superconductors

Spin Seebeck effect and thermoelectric phenomena in superconducting hybrids with magnetic textures or spin-orbit coupling

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