Quantum-Hall
Insulator
Transition
| Angus MacKinnon | |
| Blackett Laboratory, Imperial College | |
| London SW7 2BW, UK | |
| Oct. 01 – Sep. 02: Cavendish Laboratory | |
| Madingley Rd, Cambridge, UK | |
| Low Disorder – Quantum Hall Effect | |
| High Disorder – Insulator | |
| How does the transition happen? | |
| Levitation? | |
| Some other mechanism? | |
| Acknowledgement: James Dynes |
Density of
States
&
Localisation Length
| Calculate | |
| Green’s Function Recursion | |
| Landauer Geometry |
| Hall Conductivity falls in steps, but is not quantised. | |
| Higher plateaux fall first. | |
| No sign of movement of the transition region. | |
| Levitation – 1 | |
| Something else – 2 & 3 |