We investigate a freezing transition of correlated electrons in coupled two-dimensional layers in the presence of small levels of disorder using mode-coupling theory. The transition is primarily driven by correlations within the layers, but coupling between the layers is essential for the transition to occur. When the layers are far apart the ground state is a coupled electron liquid, but as the layers are brought closer, the Coulomb interactions between the layers drives the system to a coupled solid phase. The presence of one solid layer acts like additional disorder for the other layer. If the density of one layer is increased, at some critical value there is a transition in that layer to a solid phase that is weakly localized.
Freezing of strongly correlated electrons in bilayer systems with weak disorder
NEILSON, DAVID
1997-01-01
Abstract
We investigate a freezing transition of correlated electrons in coupled two-dimensional layers in the presence of small levels of disorder using mode-coupling theory. The transition is primarily driven by correlations within the layers, but coupling between the layers is essential for the transition to occur. When the layers are far apart the ground state is a coupled electron liquid, but as the layers are brought closer, the Coulomb interactions between the layers drives the system to a coupled solid phase. The presence of one solid layer acts like additional disorder for the other layer. If the density of one layer is increased, at some critical value there is a transition in that layer to a solid phase that is weakly localized.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.