Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Thermoelectric transport in the Quantum Hall regime

Tools
- Tools
+ Tools

Asman, Poppy (2017) Thermoelectric transport in the Quantum Hall regime. PhD thesis, University of Warwick.

[img]
Preview
PDF
WRAP_Theses_Asman_2017.pdf - Submitted Version - Requires a PDF viewer.

Download (4Mb) | Preview
Official URL: http://webcat.warwick.ac.uk/record=b3163897~S15

Request Changes to record.

Abstract

This research develops a theoretical model to explain the behaviour of the thermo-power in the quantum Hall regime. It uses the concept that at low temperatures the transport through the system will be caused by thermal activation as well as that caused by the conductance. The model is built up in stages, starting with proving the assumption that Dykhne's theorem will work for an asymmetric distribution of particle transport through the system and deriving the behaviour of the particles in the edge states of the system. It then combines this information with a previously developed simple model for the bulk of the modulation-doped GaAs/AlGaAs heterostructure and compares this with experimental data. This reveals that this simple system is not a viable model to represent the data, and as such the model is made more complex with the inclusion of tunnelling. The different parameters which describe the model are found, the saddle energy gap , the transition value for the edge states c, the current splitting parameter and the tunnelling parameter . This is done either by extracting them from the experimental data, or in the case of considering it as a free parameter. How these values vary with the temperature is investigated before a comparison of the theoretical model including tunnelling is conducted with the experimental data. The result from the comparison show a promising alignment between the model and experiment, and further work is proposed where is no longer considered a constant.

Item Type: Thesis (PhD)
Subjects: Q Science > QC Physics
Library of Congress Subject Headings (LCSH): Quantum Hall effect, Transport theory, Heterostructures
Official Date: October 2017
Dates:
DateEvent
October 2017UNSPECIFIED
Institution: University of Warwick
Theses Department: Department of Physics
Thesis Type: PhD
Publication Status: Unpublished
Supervisor(s)/Advisor: D'Ambrumenil, Nicholas
Extent: xiv, 90 leaves : charts
Language: eng

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us