M. P. Lilly, K. B. Cooper, J. P. Eisenstein, L. N. Pfeiffer, K. W. West
Published 1998-08-20, updated 1998-11-23Version 2
Magneto-transport experiments on high mobility two-dimensional electron gases in GaAs/AlGaAs heterostructures have revealed striking anomalies near half-filling of several spin-resolved, yet highly excited, Landau levels. These anomalies include strong anisotropies and non-linearities of the longitudinal resistivity rho_xx which commence only below about 150mK. These phenomena are not seen in the ground or first excited Landau level but begin abruptly in the third level. Although their origin remains unclear, we speculate that they reflect the spontaneous development of a generic anisotropic many-electron state.
Comments: 4 pages with 5 figures, to be published in Phys. Rev. Letters, new figure added (Fig. 4)
Comment on ``Evidence for Anisotropic State of Two-Dimensional Electrons in High Landau Levels''
Reply to Simon's Comment on "Evidence for an Anisotropic State of Two-Dimensional Electrons in High Landau Levels"
High Landau levels of 2D electrons near the topological transition caused by interplay of spin-orbit and Zeeman energy shifts
