Ann. Phys. Fr.
Volume 19, Number 4, 1994
|Page(s)||399 - 409|
|Published online||01 June 2004|
The problem of the half-filled Landau level in 2D electron systems
L.D. Landau Institute for Theoretical Physics, Kosygina 2, Moscow, Russia
According to recent theories, a system of electrons under a strong external magnetic field at filling factor v = 1/2 can be transformed to an equivalent system of fermions interacting with a Chern-Simons gauge field, such that the average effective magnetic field, acting on these fermions is zero. I discuss the results of this approach for various physical properties and corresponding experimental data.
PACS: 7320D – Electron states in low dimensional structures / 7320M – Collective excitations surface states / 7145 – Collective effects condensed matter electronic structure
Key words: fermion systems / interface states / Landau levels / magnetic field effects / half filled Landau level / 2D electron systems / strong external magnetic field / filling factor / fermions / Chern Simons gauge field / average effective magnetic field / physical properties
© EDP Sciences, 1994