Network model of localization in a random magnetic field | |
Article | |
关键词: DENOMINATOR FILLING FRACTIONS; ALTERNATING HEISENBERG CHAIN; QUANTUM HALL SYSTEM; SPIN CHAINS; PHASE; THETA=PI; STATE; | |
DOI : 10.1103/PhysRevB.52.16646 | |
来源: SCIE |
【 摘 要 】
We consider a multichannel network model to study the localization problem of noninteracting fermions in a random magnetic field with zero average. We argue that the number of channels M is even. After averaging over the randomness, the network is mapped onto M coupled SU(2N) spin chains in the N --> 0 limit. In the large conductance limit g =
【 授权许可】
Free