Magnetoresistance of vertical transport in InAs/GaSb superlattices

✍ Scribed by V.J. Broadley; R.J. Nicholas; N.J. Mason

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 272 KB
• Volume: 13
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(02)00271-0

✦ Synopsis

We report a study of the vertical transport of short-period InAs=GaSb superlattices in high parallel magnetic ÿelds. At low magnetic ÿeld, the current-voltage characteristic exhibits a double negative di erential conductance feature. We attribute the ÿrst peak to Esaki-Tsu miniband conduction and the repeat feature to LO-phonon-assisted miniband tunnelling. At high magnetic ÿelds, in the quantum limit we observe a series of conductance peaks that satisfy the Stark-cyclotron-resonance condition. At the magnetophonon condition there is a signiÿcant enhancement of these peaks. We explain these observations in terms of the strong k dependence of the miniband width.