Multiterminal Quantized Conductance in InSb Nanocrosses
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Multiterminal Quantized Conductance in InSb Nanocrosses. / Khan, Sabbir A.; Stampfer, Lukas; Mutas, Timo; Kang, Jung-Hyun; Krogstrup, Peter; Jespersen, Thomas S.
In: Advanced Materials, Vol. 33, No. 29, 2100078, 02.06.2021.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - Multiterminal Quantized Conductance in InSb Nanocrosses
AU - Khan, Sabbir A.
AU - Stampfer, Lukas
AU - Mutas, Timo
AU - Kang, Jung-Hyun
AU - Krogstrup, Peter
AU - Jespersen, Thomas S.
PY - 2021/6/2
Y1 - 2021/6/2
N2 - By studying the time-dependent axial and radial growth of InSb nanowires (NWs), the conditions for the synthesis of single-crystalline InSb nanocrosses (NCs) by molecular beam epitaxy are mapped. Low-temperature electrical measurements of InSb NC devices with local gate control on individual terminals exhibit quantized conductance and are used to probe the spatial distribution of the conducting channels. Tuning to a situation where the NC junction is connected by few-channel quantum point contacts in the connecting NW terminals, it is shown that transport through the junction is ballistic except close to pinch-off. Combined with a new concept for shadow-epitaxy of patterned superconductors on NCs, the structures reported here show promise for the realization of non-trivial topological states in multi-terminal Josephson junctions.
AB - By studying the time-dependent axial and radial growth of InSb nanowires (NWs), the conditions for the synthesis of single-crystalline InSb nanocrosses (NCs) by molecular beam epitaxy are mapped. Low-temperature electrical measurements of InSb NC devices with local gate control on individual terminals exhibit quantized conductance and are used to probe the spatial distribution of the conducting channels. Tuning to a situation where the NC junction is connected by few-channel quantum point contacts in the connecting NW terminals, it is shown that transport through the junction is ballistic except close to pinch-off. Combined with a new concept for shadow-epitaxy of patterned superconductors on NCs, the structures reported here show promise for the realization of non-trivial topological states in multi-terminal Josephson junctions.
KW - multi‐
KW - terminal quantum devices
KW - nanocrosses
KW - nanowires
KW - quantized conductance
KW - semiconductor
KW - superconductor epitaxy
KW - INAS
KW - TRANSPORT
KW - NANOWIRES
KW - JUNCTIONS
KW - EPITAXY
U2 - 10.1002/adma.202100078
DO - 10.1002/adma.202100078
M3 - Journal article
C2 - 34075631
VL - 33
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 29
M1 - 2100078
ER -
ID: 271685397