English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

A cascade of phase transitions in an orbitally mixed half-filled Landau level

MPS-Authors
/persons/resource/persons217476

Sodemann,  Inti
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

Fulltext (public)

1804.04565.pdf
(Preprint), 3MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Falson, J., Tabrea, D., Zhang, D., Sodemann, I., Kozuka, Y., Tsukazaki, A., et al. (2018). A cascade of phase transitions in an orbitally mixed half-filled Landau level. Science Advances, 4(9): eaat8742. doi:10.1126/sciadv.aat8742.


Cite as: http://hdl.handle.net/21.11116/0000-0002-96E3-4
Abstract
Half-filled Landau levels host an emergent Fermi liquid that displays instability toward pairing culminating in a gapped even-denominator fractional quantum Hall ground state. While this pairing may be probed by tuning the polarization of carriers in competing orbital and spin degrees of freedom sufficiently high quality platforms offering such tunability remain few. We explore the ground states at filling factor v = 5/2 in ZnO-based two-dimensional electron systems through a forced intersection of opposing spin branches of Landau levels taking quantum numbers N = 1 and 0. We reveal a cascade of phases with distinct magnetotransport features including a gapped phase polarized in the N = 1 level and a compressible phase in N = 0 along with an unexpected Fermi liquid a second gapped and a strongly anisotropic nematic-like phase at intermediate polarizations when the levels are near degeneracy. The phase diagram is produced by analyzing the proximity of the intersecting levels and highlights the excellent reproducibility and controllability that ZnO offers for exploring exotic fractionalized electronic phases.