Subband Engineering Even-Denominator Quantum Hall States

Details Subband Engineering Even-Denominator Quantum Hall States Subband Engineering Even-Denominator Quantum Hall States

2010-04-09

arxiv.org/abs/1004.1636v2

Phys. Rev. B 82, 121304(R) (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.82.121304

Proposed even-denominator fractional quantum Hall effect (FQHE) states suggest the possibility of excitations with non-Abelian braid statistics. Recent experiments on wide square quantum wells observe even-denominator FQHE even under electrostatic tilt. We theoretically analyze these structures and develop a procedure to accurately test proposed quantum Hall wavefunctions. We find that tilted wells favor partial subband polarization to yield Abelian even-denominator states. Our results show that tilting quantum wells effectively engineers different interaction potentials allowing exploration of a wide variety of even-denominator states.

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