2011 Fiscal Year Final Research Report
Detection and Coherent Manipulation of Andreev Bound States in Semiconducting Nanowires
| Project/Area Number |
22760018
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
NISHIO Takahiro 独立行政法人理化学研究所, 石橋極微デバイス工学研究室, 基礎科学特別研究員 (30565271)
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| Project Period (FY) |
2010 – 2011
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| Keywords | インジウム砒素ナノワイヤ / 超伝導 / トランズモン / 量子細線 / アンドレーエフ束縛状態 / 量子ビット / マイクロ波 / ジョセフソン接合 |
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| Research Abstract |
One-dimensional superconducting transistors have been fabricated with individual InAs nanowires(NWs) using radio-frequency sputter cleaning followed by in situ metal deposition. Because of the highly transparent contacts formed in between the InAs NWs and the metals, supercurrent, multiple Andreev reflections and Shapiro steps under microwave radiation have been observed. Near pinch-off gate regions, Fabry. Perot interference and a normal conductance quantization with resonant features have been observed, which were found to be correlated with a supercurrent flow. By using the method, we fabricated transmon superconducting qubits with InAs NWs.
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