Phase Modulated Thermal Conductance of Josephson Weak Links

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dc.creatorZhao, Erhai
dc.creatorLofwander, Tomas
dc.creatorSauls, J. A.
dc.date2003-02-17
dc.date2003-09-02
dc.date.accessioned2026-07-07T02:49:42Z
dc.date.available2026-07-07T02:49:42Z
dc.descriptionWe present a theory for quasiparticle heat transport through superconducting weak links. The thermal conductance depends on the phase difference ($ϕ$) of the superconducting leads. Branch conversion processes, low-energy Andreev bound states near the contact and the suppression of the local density of states near the gap edge are related to phase-sensitive transport processes. Theoretical results for the influence of junction transparency, temperature and disorder, on the phase modulation of the conductance are reported. For high-transmission weak links, $D\to 1$, the formation of an Andreev bound state at $ε_{\text{\tiny b}}=Δ\cos(ϕ/2)$ leads to suppression of the density of states for the continuum excitations that transport heat, and thus, to a reduction in the conductance for $ϕ\simeqπ$. For low-transmission ($D\ll 1$) barriers resonant scattering at energies $ε\simeq(1+D/2)Δ$ leads to an increase in the thermal conductance as $T$ drops below $T_c$ (for phase differences near $ϕ=π$).
dc.description4 pages, 3 figures Expanded discussion of boundary conditions for Ricatti amplitudes
dc.identifierhttps://arxiv.org/abs/cond-mat/0302346
dc.identifierhttp://arxiv.org/abs/cond-mat/0302346
dc.identifierPhys. Rev. Lett. 91, 077003 (2003) [URL: http://link.aps.org/abstract/PRL/v91/e077003]
dc.identifierdoi:10.1103/PhysRevLett.91.077003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20900
dc.subjectSuperconductivity
dc.titlePhase Modulated Thermal Conductance of Josephson Weak Links
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