A Phase Diagram for Quantum Hall Bilayers with Strong Inter-layer Correlation

Details A Phase Diagram for Quantum Hall Bilayers with Strong Inter-layer Correlation A Phase Diagram for Quantum Hall Bilayers with Strong Inter-layer Correlation

2009-07-23

arxiv.org/abs/0907.4032v1

Physics

Condensed Matter

Other Condensed Matter

5 pages and 5 figures

Scientific paper

Inter-layer excitonic coherence in a quantum Hall bilayer with negligible tunneling is monitored by measurements of low-lying spin excitations. At $\nu_T =1$ new quasiparticle excitations are observed above a transition temperature revealing a competing metallic phase. For magnetic fields above an onset Zeeman energy this metallic phase has full spin polarization. A phase diagram in the parameter space of temperature and Zeeman energy reveals that the transition temperature increases at higher fields. This unexpected result suggests intriguing impacts of spin polarization in the highly correlated phases.

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