Direct transport between superconducting subgap states in a double quantum dot
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Direct transport between superconducting subgap states in a double quantum dot. / Steffensen, G. O.; Saldana, J. C. Estrada; Vekris, A.; Krogstrup, P.; Grove-Rasmussen, K.; Nygard, J.; Yeyati, A. L.; Paaske, J.
I: Physical Review B, Bind 105, Nr. 16, 161302, 15.04.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Direct transport between superconducting subgap states in a double quantum dot
AU - Steffensen, G. O.
AU - Saldana, J. C. Estrada
AU - Vekris, A.
AU - Krogstrup, P.
AU - Grove-Rasmussen, K.
AU - Nygard, J.
AU - Yeyati, A. L.
AU - Paaske, J.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - We demonstrate direct transport between two opposing sets of Yu-Shiba-Rusinov (YSR) subgap states realized in a double quantum dot. This bound-state-to-bound-state transport relies on intrinsic quasiparticle relaxation, and the tunable gating of this quantum dot device allows us to explore also an additional relaxation mechanism based on charge transferring Andreev reflections. The transition between these two relaxation regimes is identified in the experiment as a marked gate-induced stepwise change in conductance. We present a transport calculation, including YSR bound states and multiple Andreev reflections alongside quasiparticle relaxation, due to a weak tunnel coupling to a nearby normal metal, and obtain excellent agreement with the data.
AB - We demonstrate direct transport between two opposing sets of Yu-Shiba-Rusinov (YSR) subgap states realized in a double quantum dot. This bound-state-to-bound-state transport relies on intrinsic quasiparticle relaxation, and the tunable gating of this quantum dot device allows us to explore also an additional relaxation mechanism based on charge transferring Andreev reflections. The transition between these two relaxation regimes is identified in the experiment as a marked gate-induced stepwise change in conductance. We present a transport calculation, including YSR bound states and multiple Andreev reflections alongside quasiparticle relaxation, due to a weak tunnel coupling to a nearby normal metal, and obtain excellent agreement with the data.
KW - COHERENT MANIPULATION
U2 - 10.1103/PhysRevB.105.L161302
DO - 10.1103/PhysRevB.105.L161302
M3 - Journal article
VL - 105
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 16
M1 - 161302
ER -
ID: 315759163