| EPSRC Reference: |
GR/M16092/01 |
| Title: |
MICROWAVE STUDIES OF TWO-DIMENSIONAL SYSTEMS |
| Principal Investigator: |
Mellor, Dr CJ |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Sch of Physics & Astronomy |
| Organisation: |
University of Nottingham |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 February 1999 |
Ends: |
31 March 2002 |
Value (£): |
222,365
|
| EPSRC Research Topic Classifications: |
|
| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
|
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
The insulating and quantum liquid states of low dimensional systems are topics of great scientific importance. We propose to use two related experimental techniques, surface acoustic wave SAW propagation and microwave absorption at finite wavevector , to study the magnetically-induced Wigner solid (MIWS), coupled bilayer systems, the Hall insulator and composite fermions. Microwave absorption at frequencies up to 10GHz and wavelengths below 1 micron will be measured using meander lines fabricated on sapphire substrates. These measurements will allow us to obtain important information on the high frequency behaviour of the quantum liquid states of the fractional quantum Hall effect and insulating states such as the MIWS in both single and bilayer samples. The dynamical phase transition in the MIWS when a threshold electric field causes the solid to slide will also be studied. The development of new meander lines and microwave cabling for cryogenic use will be needed. SAW measurements will provide complementary information on these systems and will also be used to study the Hall insulator. Acoustoelectric effects, SAW attenuation and dispersion, at frequencies up to 12GHz, will be measured in a system with a spatially varying composite fermion density produced by patterning a 2-D carrier device with magnetic stripes.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.nottingham.ac.uk |