Rights statement: © 1996 The American Physical Society
Final published version, 101 KB, PDF document
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Magneto-optical evidence of the percolation nature of the metal-insulator transition in the two-dimensional electron system
AU - Kukushkin, I. V.
AU - Falko, Vladimir
AU - Haug, R. J.
AU - von Klitzing, K.
AU - Eberl, K.
N1 - © 1996 The American Physical Society
PY - 1996/5/15
Y1 - 1996/5/15
N2 - We compare the results of the transport and time-resolved magnetoluminescence measurements in disordered two-dimensional (2D) electron systems in GaAs-AlxGa1-xAs heterostructures in the extreme quantum limit, particularly in the vicinity of the metal-insulator transition (MIT). At filling factors nu<1, the optical signal has two components: the single-rate exponentially decaying part attributed to a uniform liquid and a power-law long-living tail specific to a microscopically inhomogeneous state of electrons. We interpret this result as a separation of the 2D electron system into liquid and localized phases, especially because the MIT occurs strikingly close to those filling factors where the liquid occupies 1/2 of the sample area (the percolation threshold condition in two-component media).
AB - We compare the results of the transport and time-resolved magnetoluminescence measurements in disordered two-dimensional (2D) electron systems in GaAs-AlxGa1-xAs heterostructures in the extreme quantum limit, particularly in the vicinity of the metal-insulator transition (MIT). At filling factors nu<1, the optical signal has two components: the single-rate exponentially decaying part attributed to a uniform liquid and a power-law long-living tail specific to a microscopically inhomogeneous state of electrons. We interpret this result as a separation of the 2D electron system into liquid and localized phases, especially because the MIT occurs strikingly close to those filling factors where the liquid occupies 1/2 of the sample area (the percolation threshold condition in two-component media).
U2 - 10.1103/PhysRevB.53.R13260
DO - 10.1103/PhysRevB.53.R13260
M3 - Journal article
VL - 53
SP - 13260
EP - 13263
JO - Physical review B
JF - Physical review B
SN - 0163-1829
IS - 20
ER -