Spontaneous Interlayer Charge Transfer near the Magnetic Quantum Limit

Details Spontaneous Interlayer Charge Transfer near the Magnetic Quantum Limit Spontaneous Interlayer Charge Transfer near the Magnetic Quantum Limit

1997-09-25

arxiv.org/abs/cond-mat/9709288v1

Phys. Rev. Lett., vol. 79, p. 2722 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures (1 color) included in text. Related papers at http://www.ee.princeton.edu/~hari/papers.html

Scientific paper

10.1103/PhysRevLett.79.2722

Experiments reveal that a confined electron system with two equally-populated layers at zero magnetic field can spontaneously break this symmetry through an interlayer charge transfer near the magnetic quantum limit. New fractional quantum Hall states at unusual total filling factors such as \nu = 11/15 (= 1/3 + 2/5) stabilize as signatures that the system deforms itself, at substantial electrostatic energy cost, in order to gain crucial correlation energy by "locking in" separate incompressible liquid phases at unequal fillings in the two layers (e.g., layered 1/3 and 2/5 states in the case of \nu = 11/15).

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