Title: Thermally Activated Resonant Tunnelling in GaAs/AlGaAs Triple Barrier Heterostructures

Citation
Allford CP, Buckle PD (2015). Thermally Activated Resonant Tunnelling in GaAs/AlGaAs Triple Barrier Heterostructures. Cardiff University. http://doi.org/10.17035/d.2015.100109


Access Rights: Data can be made freely available subject to attribution
Access Method: Click to email a request for this data to opendata@cardiff.ac.uk

Cardiff University Dataset Creators

Dataset Details
Publisher: Cardiff University
Date (year) of data becoming publicly available: 2015
Data type: comma-separated values
Data format: .txt
Estimated total storage size of dataset: Less than 100 megabytes
DOI: 10.17035/d.2015.100109

Description
Electrical measurements (I(V)), with applied voltage (V) and measured current (I) have been performed at various temperatures on GaAs/AlGaAs triple barrier resonant tunnelling structures. Data is available in .txt files, with a two column format, one for voltage, measured in volts and the other for current, measured in Ampere’s. Each file has a header which indicates which column corresponds to voltage or current. Each file is named to represent the sample wafer under test, the pins used on a 20-way ceramic package into which the sample wafers were mounted and bonded, and the temperature at which the data was taken. Seven devices have been measured electrically, with the epitaxial layer structure differing between each sample as described in the publication. The I(V) measurements were taken using a four-wire technique on an Agilent Technologies E5270B 8 Slot Precision Mainframe and two E5281B Precision Medium Power SMU Modules. One SMU module was held at 0.0V, on which the current was measured, with the other SMU module varied between 0.0 and 0.6V, on which the applied voltage was measured. Samples were mounted in a Cryomech PT403 closed-cycle pulse-tube cryostat which utilises an Oxford Instruments Mercury iTC temperature controller to regulate the temperature. Measurements were automated using bespoke written python code.

Results are published in the article at http://iopscience.iop.org/0268-1242/30/10/105035

Keywords

Resonant Tunnelling Structures

Related Projects

Last updated on 2019-21-10 at 11:46