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Solitonic Josephson Thermal Transport

Claudio Guarcello1,2,*, Paolo Solinas3, Alessandro Braggio1, and Francesco Giazotto1

  • 1NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, I-56127 Pisa, Italy
  • 2Radiophysics Department, Lobachevsky State University, Gagarin Avenue 23, 603950 Nizhni Novgorod, Russia
  • 3SPIN-CNR, Via Dodecaneso 33, 16146 Genova, Italy

  • *claudio.guarcello@nano.cnr.it
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Phys. Rev. Applied 9, 034014 – Published 19 March, 2018

DOI: https://doi.org/10.1103/PhysRevApplied.9.034014

Abstract

We explore the coherent thermal transport sustained by solitons through a long Josephson junction as a thermal gradient across the system is established. We observe that a soliton causes the heat current through the system to increase. Correspondingly, the junction warms up in conjunction with the soliton, with temperature peaks up to, e.g., approximately 56 mK for a realistic Nb-based proposed setup at a bath temperature Tbath=4.2  K. The thermal effects on the dynamics of the soliton are also discussed. Markedly, this system inherits the topological robustness of the solitons. In view of these results, the proposed device can effectively find an application as a superconducting thermal router in which the thermal transport can be locally mastered through solitonic excitations, whose positions can be externally controlled through a magnetic field and a bias current.

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Phys. Rev. Applied 9, 034014– Published 19 March, 2018
  • Received 30 November 2017
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