Andreev Molecule in Parallel InAs Nanowires
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Andreev Molecule in Parallel InAs Nanowires. / Kurtossy, Oliver; Scherubl, Zoltan; Fulop, Gergo; Lukacs, Istvan Endre; Kanne, Thomas; Nygard, Jesper; Makk, Peter; Csonka, Szabolcs.
In: Nano Letters, Vol. 21, No. 19, 13.10.2021, p. 7929-7937.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Andreev Molecule in Parallel InAs Nanowires
AU - Kurtossy, Oliver
AU - Scherubl, Zoltan
AU - Fulop, Gergo
AU - Lukacs, Istvan Endre
AU - Kanne, Thomas
AU - Nygard, Jesper
AU - Makk, Peter
AU - Csonka, Szabolcs
PY - 2021/10/13
Y1 - 2021/10/13
N2 - Coupling individual atoms fundamentally changes the state of matter: electrons bound to atomic cores become delocalized turning an insulating state to a metallic one. A chain of atoms could lead to more exotic states if the tunneling takes place via the superconducting vacuum and can induce topologically protected excitations like Majorana or parafermions. Although coupling a single atom to a superconductor is well studied, the hybridization of two sites with individual tunability was not reported yet. The peculiar vacuum of the Bardeen-Cooper-Schrieffer (BCS) condensate opens the way to annihilate or generate two electrons from the bulk resulting in a so-called Andreev molecular state. By employing parallel nanowires with an Al shell, two artificial atoms were created at a minimal distance with an epitaxial superconducting link between. Hybridization via the BCS vacuum was observed and the spectrum of an Andreev molecule as a function of level positions was explored for the first time.
AB - Coupling individual atoms fundamentally changes the state of matter: electrons bound to atomic cores become delocalized turning an insulating state to a metallic one. A chain of atoms could lead to more exotic states if the tunneling takes place via the superconducting vacuum and can induce topologically protected excitations like Majorana or parafermions. Although coupling a single atom to a superconductor is well studied, the hybridization of two sites with individual tunability was not reported yet. The peculiar vacuum of the Bardeen-Cooper-Schrieffer (BCS) condensate opens the way to annihilate or generate two electrons from the bulk resulting in a so-called Andreev molecular state. By employing parallel nanowires with an Al shell, two artificial atoms were created at a minimal distance with an epitaxial superconducting link between. Hybridization via the BCS vacuum was observed and the spectrum of an Andreev molecule as a function of level positions was explored for the first time.
KW - Andreev molecule
KW - Yu-Shiba-Rusinov
KW - superconductivity
KW - nanowire
KW - hybridization
KW - SUPERCONDUCTOR
KW - STATES
U2 - 10.1021/acs.nanolett.1c01956
DO - 10.1021/acs.nanolett.1c01956
M3 - Journal article
C2 - 34538054
VL - 21
SP - 7929
EP - 7937
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 19
ER -
ID: 283133694