Physics

Electron

Isotropy

Magnetic field

Conductivity

Quantum Hall effect

Condensed matter physics

Phase (matter)

Quantum mechanics

Electrical resistivity and conductivity

Anisotropy

Landau quantization

Quantum

Fermi gas

Physical review. B./Physical review. B

Quantum Hall stripe (QHS) phases, predicted by the Hartree-Fock theory, are manifested in GaAs-based two-dimensional electron gases as giant resistance anisotropies. Here, we predict a ``hidden'' QHS phase which exhibits isotropic resistivity whose value, determined by the density of states of QHS, is independent of the Landau index $N$ and is inversely proportional to the Drude conductivity at zero magnetic field. At high enough $N$, this phase yields to an Ando-Unemura/Coleridge-Zawadski-Sachrajda phase in which the resistivity is proportional to $1/N$ and to the ratio of quantum and transport lifetimes. Experimental observation of this border can provide an alternative way to obtain quantum relaxation time.

Isotropically conducting (hidden) quantum Hall stripe phases in a two-dimensional electron gas