Repository logo
 

Quantum ballistic transport in strained epitaxial germanium

Published version
Peer-reviewed

Type

Article

Change log

Authors

Gul, Y 
Holmes, SN 
Newton, PJ 
Ellis, DJP 
Morrison, C 

Abstract

jats:pLarge scale fabrication using Complementary Metal Oxide Semiconductor compatible technology of semiconductor nanostructures that operate on the principles of quantum transport is an exciting possibility now due to the recent development of ultra-high mobility hole gases in epitaxial germanium grown on standard silicon substrates. We present here a ballistic transport study of patterned surface gates on strained Ge quantum wells with SiGe barriers, which confirms the quantum characteristics of the Ge heavy hole valence band structure in 1-dimension. Quantised conductance at multiples of 2e2/h is a universal feature of hole transport in Ge up to 10 × (2e2/h). The behaviour of ballistic plateaus with finite source-drain bias and applied magnetic field is elucidated. In addition, a reordering of the ground state is observed.</jats:p>

Description

Keywords

5108 Quantum Physics, 40 Engineering, 51 Physical Sciences, 4018 Nanotechnology, 5104 Condensed Matter Physics

Journal Title

Applied Physics Letters

Conference Name

Journal ISSN

0003-6951
1077-3118

Volume Title

111

Publisher

AIP Publishing

Rights

Publisher's own licence
Sponsorship
Engineering and Physical Sciences Research Council (EP/J003638/1)