Simultaneous Excitation of Spins and Pseudospins in the Bilayer $ν=1$ Quantum Hall State

Details Simultaneous Excitation of Spins and Pseudospins in the Bilayer $ν=1$ Quantum Hall State Simultaneous Excitation of Spins and Pseudospins in the Bilayer $ν=1$ Quantum Hall State

2004-03-19

arxiv.org/abs/cond-mat/0403512v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1016/j.physe.2003.11.214

The tilting angular dependence of the energy gap was measured in the bilayer quantum Hall state at the Landau level filling $\nu=1$ by changing the density imbalance between the two layers. The observed gap behavior shows a continuous transformation from the bilayer balanced density state to the monolayer state. Even a sample with 33 K tunneling gap shows the same activation energy anomaly reported by Murphy {\it et al.}. We discuss a possible relation between our experimental results and the quantum Hall ferromagnet of spins and pseudospins.

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