Manifestation of spin degrees of freedom in the double fractional quantum Hall system
Abstract
The double fractional quantum Hall system of spin 1/2 electrons is numerically studied to predict that there exists a novel spin-unpolarized quantum liquid specific to the multi-species system, which exemplifies a link between the spin state and the inter-layer electron correlation. Even when the ground state is spin-polarized, the lowest charge-excitation mode involves the spin when the interlayer tunneling is considered.
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