Quantum Interference Effects in InAs Semiconductor Nanowires
- Title
- Quantum Interference Effects in InAs Semiconductor Nanowires
- Authors
- DOH, YONG-JOO; ROEST, AARNOUD L.; BAKKERS, ERIK P. A. M.; DE FRANCESCHI, SILVARLO; KOUWENHOVEN, LEO; null
- Date Issued
- 2009-01
- Publisher
- KOREAN PHYSICAL SOCIETY
- Abstract
- We report quantum interference effects in InAs semiconductor nanowires strongly coupled to superconducting electrodes. In the normal state, universal conductance fluctuations are investigated as a function of the magnetic field, the temperature, the bias and the gate voltage. The results are found to be in good agreement with theoretical predictions for weakly disordered one-dimensional conductors. In the superconducting state, the fluctuation amplitude is enhanced by a factor up to similar to 1.6, which is attributed to a doubling of the charge transport via Andreev reflection. At a temperature of 4.2 K, well above the Thouless temperature, conductance fluctuations are almost entirely suppressed and the nanowire conductance exhibits anomalous quantization in steps of e(2)/h.
- Keywords
- InAs; Semiconductor nanowires; Universal conductance fluctuations; Superconductors; Conductance quantization; NORMAL-METAL/SUPERCONDUCTOR SAMPLES; DIMENSIONAL ELECTRON-GAS; CONDUCTANCE FLUCTUATIONS; CONDUCTIVITY; SUPERCURRENT; TRANSPORT; DOTS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29210
- ISSN
- 0374-4884
- Article Type
- Article
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- There are no files associated with this item.
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