2014/10/21 by S. Hasdemir, Sukret Hasdemir, Yang Liu +7 · 21 citations
Mathematics · Physics and Astronomy · #Algorithm #Charge (physics) #Condensed matter physics #Geometry #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #State (computer science) #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.91.045113
published in Physical Review B 91(4) (American Physical Society)
arxiv created 2014/10/21 · openalex publication_date 2015/01/14 · arxiv updated 2015/06/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Magnetotransport measurements on two-dimensional electrons confined to wide GaAs quantum wells reveal a remarkable evolution of the ground state at filling factor \ensuremathν=1/2 as we tilt the sample in the magnetic field. Starting with a compressible state at zero tilt angle, a strong \ensuremathν=1/2 fractional quantum Hall state appears at intermediate angles. At higher angles an insulating phase surrounds this state and eventually engulfs it at the highest angles. This evolution occurs because the parallel component of the field renders the charge distribution increasingly bilayer-like. The evolution is qualitatively similar to the one seen, in the absence of parallel field, as a function of increasing the electron density in the quantum well, but there are some notable differences.