Workshop book - Physikzentrum der RWTH Aachen - RWTH Aachen ...

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Posters Monday February 4 Poster 19: Quantized conductance in InSb nanowires and electrical characterization of branched InSb nanowires Ilse van Weperen Indium antimonide (InSb) nanowires have shown potential for creation of topological superconducting and helical liquid states. We report on transport measurements of single high-mobility indium antimonide nanowires and branched InSb nanowires. A novel growth mechanism allows two InSb nanowires to merge into a nano- T or nanocross. Transport measurements of branched nanowires show characteristics similar to that of single nanowires. Magnetoresistance measurements of nanocrosses allow extraction of nanowire electron density. A mean free path of ∼ 300 nm in InSb nanowires enables observation of one-dimensional conductance channels at high (B > 2 T) magnetic fields. Conductance quantization is studied as a function of magnetic field and bias voltage, enabling extraction of an effective g-factor of ∼ 65 and a subband spacing of ∼ 15 meV. Poster 20: Phase-Coherent Transport and Spin-Orbit Coupling in InAs Nanowires Sebastian Heedt We report on phase-coherent transport measurements on differently doped InAs nanowires grown by selective area metalorganic vapor phase epitaxy. The nanowires are contacted individually and the low-temperature electronic transport properties are investigated for temperatures down to 30 mK and magnetic fields up to 10 T. To this end, top-gates with high-k dielectrics are prepared. At small current-bias the transport is phase-coherent and gives us the opportunity to determine the phase-coherence length and the spin relaxation length. The band profile and the carrier concentration of the nanowires can be manipulated by the application of a gate voltage. An analytical model for the low-field quantum conductivity correction is utilized to quantify Rashba and Dresselhaus spin-orbit coupling effects. Nanowires with different doping concentrations are investigated to gain information on how the doping of the highly spin-orbit coupled InAs nanowires impacts the spin-lifetime. 70
Posters Tuesday February 5 Posters Tuesday February 5 Time: 15:30 - 17:00 Poster numbers: 21-43 Topics: Spin-orbit hybrid systems Carbon nanotubes and graphene 71
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PROGRAM BOOK International workshop
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What comes with this booklet With t
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Getting to the institute (1) If you
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Workshop lecture hall • The works
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Lunch information Lunch will be tak
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Talks Monday February 4 Talk progra
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Talks Monday February 4 Notes 13
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Page 19 and 20: Talks Monday February 4 Notes 19
Page 29 and 30: Talks Tuesday February 5 Talks Tues
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Page 47 and 48: Talks Wednesday February 6 Talks We
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Page 86 and 87: 18. Domenico Giuliano, Universita
Page 88 and 89: 55. Jens Paaske, Copenhagen Univers
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Workshop book - Physikzentrum der RWTH Aachen - RWTH Aachen ...

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