2D LATTICE OF COUPLED SINAI BILLIARDS : METAL OR INSULATOR AT G 1?

We investigate the transport in a two-dimensional (2D) lattice of coupled Sinai billiards fabricated on the basis of a high-mobility 2D electron gas in a GaAs/AlGaAs heterojunction in going from g >1t o g1 (where ga r/(e 2 /h )i s dimensionless conductivity). The data obtained suggest that the system studied behaves more like a metal than an insulator at g 1 and is not described by the generally accepted picture of metal‐insulator transition in 2D electron systems. ” 1998 Published by Elsevier Science B.V. All rights reserved.