Wigner Glass, Spin-liquids, and the Metal-Insulator Transition

Details Wigner Glass, Spin-liquids, and the Metal-Insulator Transition Wigner Glass, Spin-liquids, and the Metal-Insulator Transition

1998-05-28

arxiv.org/abs/cond-mat/9805383v2

Phil. Mag. B 79, 859, 1999.

Physics

Condensed Matter

Strongly Correlated Electrons

Revised manuscript 6 pages, 1 figure redrawn for clarity; discussion of experiments expanded

Scientific paper

10.1080/014186399256952

Recent experiments on the two dimensional electron gas in various semiconductor devices have revealed an unexpected metal-insulator transition and have challenged the previously held assumption that there is no such transition in two dimensions. While the experiments are still at the stage of rapid development, it is becoming evident that they cannot be understood from the conventional perspective of weak interactions. In the present paper, we propose the following. (1) The low-density insulating state is the Wigner Glass, a phase with quasi-long-range translational order and competing ferromagnetic and antiferromagnetic spin-exchange interactions. (2) The transition is the melting of this Wigner Glass, disorder being the agent allowing the transition to be second order. (3) Within the Wigner Glass phase, there are at least two, distinct magnetic ground-states, a ferromagnetic state at very low electron density and a spin-liquid state with a spin pseudo-gap at higher densities. (4) The metallic side of the transition is a non-Fermi liquid. These conclusions are encapsulated in Figure 1 which presents the proposed phase diagram as a function of disorder strength and density; we also suggest experimental signatures of the various phases and transitions.

Affiliated with

Also associated with

No associations

Rating

Wigner Glass, Spin-liquids, and the Metal-Insulator Transition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Wigner Glass, Spin-liquids, and the Metal-Insulator Transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wigner Glass, Spin-liquids, and the Metal-Insulator Transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-545885