Thermoelectric-induced unitary Cooper pair splitting efficiency

Abstract

Thermoelectric effect is exploited to optimize the Cooper pair splitting efficiency in a Y-shaped junction, which consists of two normal leads coupled to an $s$-wave superconductor via double noninteracting quantum dots. Here, utilizing temperature difference rather than bias voltage between the two normal leads, and tuning the two dot levels such that the transmittance of elastic cotunneling process is particle-hole symmetric, we find currents flowing through the normal leads are totally contributed from the splitting of Cooper pairs emitted from the superconductor. Such a unitary splitting efficiency is significantly better than the efficiencies obtained in experiments so far.

5 pages, 4 figures, accepted by APL

References in corpus (7)

• Free-Space distribution of entanglement and single photons over 144 km
• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Near-unity Cooper pair splitting efficiency
• Superconducting proximity effect in interacting double-dot systems
• Current-current correlations in hybrid superconducting and normal metal multiterminal structures
• Unconventional Superconductivity in Double Quantum Dots
• Currents and current correlations in a topological superconducting nanowire beam splitter

Cited by in corpus (18)

• Nonlocal thermoelectricity in a Cooper-pair splitter
• Cooling by Cooper pair splitting
• Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
• Nonlocal quantum heat engines made of hybrid superconducting devices
• Heat switch and thermoelectric effects based on Cooper-pair splitting and elastic cotunneling
• On-demand thermoelectric generation of equal-spin Cooper pairs
• Double quantum dot Cooper-pair splitter at finite couplings
• Quantum transport through a quantum dot side-coupled to a Majorana bound state pair in the presence of electron-phonon interaction
• How long does it take to form the Andreev quasiparticles ?
• Adiabatic Cooper pair splitter
• Probing electron-hole weights of an Andreev bound state by transient currents
• Majorana-mediated thermoelectric transport in multiterminal junctions
• Thermoelectric processes of quantum normal-superconductor interfaces
• Coherent control of thermoelectric currents and noise in quantum thermocouples
• Single-photon pump by Cooper-pair splitting
• Transport signatures of inverted Andreev bands in topological Josephson junctions
• Extrinsic thermoelectric response of coherent conductors
• Cooper-pair splitters as circuit elements for realizing topological superconductors