Triplet-blockaded Josephson supercurrent in double quantum dots
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Triplet-blockaded Josephson supercurrent in double quantum dots. / Bouman, Daniel; van Gulik, Ruben J. J.; Steffensen, Gorm; Pataki, David; Boross, Peter; Krogstrup, Peter; Nygard, Jesper; Paaske, Jens; Palyi, Andras; Geresdi, Attila.
In: Physical Review B, Vol. 102, No. 22, 220505, 21.12.2020.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - Triplet-blockaded Josephson supercurrent in double quantum dots
AU - Bouman, Daniel
AU - van Gulik, Ruben J. J.
AU - Steffensen, Gorm
AU - Pataki, David
AU - Boross, Peter
AU - Krogstrup, Peter
AU - Nygard, Jesper
AU - Paaske, Jens
AU - Palyi, Andras
AU - Geresdi, Attila
PY - 2020/12/21
Y1 - 2020/12/21
N2 - Serial double quantum dots created in semiconductor nanostructures provide a versatile platform for investigating two-electron spin quantum states, which can be tuned by electrostatic gating and an external magnetic field. In this Rapid Communication, we directly measure the supercurrent reversal between adjacent charge states of an InAs nanowire double quantum dot with superconducting leads, in good agreement with theoretical models. In the even charge parity sector, we observe a supercurrent blockade with increasing magnetic field, corresponding to the spin singlet to triplet transition. Our results demonstrate a direct spin to supercurrent conversion, the superconducting equivalent of the Pauli spin blockade. This effect can be exploited in hybrid quantum architectures coupling the quantum states of spin systems and superconducting circuits.
AB - Serial double quantum dots created in semiconductor nanostructures provide a versatile platform for investigating two-electron spin quantum states, which can be tuned by electrostatic gating and an external magnetic field. In this Rapid Communication, we directly measure the supercurrent reversal between adjacent charge states of an InAs nanowire double quantum dot with superconducting leads, in good agreement with theoretical models. In the even charge parity sector, we observe a supercurrent blockade with increasing magnetic field, corresponding to the spin singlet to triplet transition. Our results demonstrate a direct spin to supercurrent conversion, the superconducting equivalent of the Pauli spin blockade. This effect can be exploited in hybrid quantum architectures coupling the quantum states of spin systems and superconducting circuits.
KW - SPIN
KW - SUPERCONDUCTORS
KW - TRANSPORT
U2 - 10.1103/PhysRevB.102.220505
DO - 10.1103/PhysRevB.102.220505
M3 - Journal article
VL - 102
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 22
M1 - 220505
ER -
ID: 255160506