Nanowire diodes have been realized by employing an axial heterojunction between InAs and InSb semiconductor materials. The broken-gap band alignment (type III) leads to a strong rectification effect when the current-voltage (I-V) characteristic is inspected at room temperature. The additional insertion of a narrow InP barrier reduces the thermionic contribution, which results in a net decrease of leakage current in the reverse bias with a corresponding enhanced rectification in terms of asymmetry in the I-V characteristics. The investigated diodes compare favorably with the ones realized with p-n heterostructured nanowires, making InAs/InP/InSb devices appealing candidates to be used as building blocks for nanowire-based ultrafast electronics and for the realization of photodetectors in the THz spectral range.
|Autori:||Pitanti, A.; Ercolani, D.; Sorba, L.; Roddaro, Stefano; Beltram, F.; Nasi, L.; Salviati, G.; Tredicucci, Alessandro|
|Titolo:||InAs/InP/InSb Nanowires as Low Capacitance n-n Heterojunction Diodes|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1103/PhysRevX.1.011006|
|Appare nelle tipologie:||1.1 Articolo in rivista|