Zero bias conductance peak in InAs nanowire coupled to superconducting electrodes
- Zero bias conductance peak in InAs nanowire coupled to superconducting electrodes
- 송진동; Nam-Hee Kim; Yun-Sok Shin; Hong-Seok Kim; Yong-Joo Doh
- Issue Date
- Current applied physics
- VOL 18, NO 4-387
- We report the occurrence of the zero-bias conductance peak (ZBCP) in an InAs nanowire coupled to PbIn superconductors with varying temperature, bias voltage, and magnetic field. The ZBCP is suppressed with increasing temperature and bias voltage above the Thouless energy of the nanowire. Applying a magnetic field also diminishes the ZBCP when the resultant magnetic flux reaches the magnetic flux quantum h/2e. Our observations are consistent with theoretical expectations of reflectionless tunneling, in which the phase coherence between an electron and its Andreev-reflected hole induces the ZBCP as long as time-reversal symmetry is preserved.
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