Supercurrent in a Double Quantum Dot
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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Supercurrent in a Double Quantum Dot. / Estrada Saldaña, J. C.; Vekris, A.; Steffensen, G.; Žitko, R.; Krogstrup, P.; Paaske, J.; Grove-Rasmussen, K.; Nygård, J.
I: Physical Review Letters, Bind 121, Nr. 25, 112010, 20.12.2018.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - Supercurrent in a Double Quantum Dot
AU - Estrada Saldaña, J. C.
AU - Vekris, A.
AU - Steffensen, G.
AU - Žitko, R.
AU - Krogstrup, P.
AU - Paaske, J.
AU - Grove-Rasmussen, K.
AU - Nygård, J.
N1 - [Qdev]
PY - 2018/12/20
Y1 - 2018/12/20
N2 - We demonstrate the Josephson effect in a serial double quantum dot defined in a nanowire with epitaxial superconducting leads. The supercurrent stability diagram adopts a honeycomb pattern. We observe sharp discontinuities in the magnitude of the critical current, $I_c$, as a function of dot occupation, related to doublet to singlet ground state transitions. Detuning of the energy levels offers a tuning knob for $I_c$, which attains a maximum at zero detuning. The consistency between experiment and theory indicates that our device is a faithful realization of the two-impurity Anderson model.
AB - We demonstrate the Josephson effect in a serial double quantum dot defined in a nanowire with epitaxial superconducting leads. The supercurrent stability diagram adopts a honeycomb pattern. We observe sharp discontinuities in the magnitude of the critical current, $I_c$, as a function of dot occupation, related to doublet to singlet ground state transitions. Detuning of the energy levels offers a tuning knob for $I_c$, which attains a maximum at zero detuning. The consistency between experiment and theory indicates that our device is a faithful realization of the two-impurity Anderson model.
KW - Nanowires
KW - Quantum Transport
KW - Josephson effect
U2 - 10.1103/PhysRevLett.121.257701
DO - 10.1103/PhysRevLett.121.257701
M3 - Letter
C2 - 30608792
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 112010
ER -
ID: 210442145