1999/10/25 by Victor Gurarie, V Gurarie, Yong Baek Kim +1
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1209/epl/i2000-00490-0
published as Europhys. Lett. 52, 667 (2000) · 4 pages
arxiv created 1999/10/25 · openalex publication_date 2000/12/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The double-layer electron system with total filling factor ν = 1/2 can be regarded as two separate Fermi-liquid–like states with ν = 1/4 when the layer separation is sufficiently large and there is no tunneling. The weak tunneling in this state suffers an orthogonality catastrophe and becomes irrelevant. When the symmetric and antisymmetric combinations of layer indices are taken as the pseudospin degrees of freedom, our results indicate that the first-order transition occurs from the above pseudospin-unpolarized state to the pseudospin-polarized Fermi-liquid–like state with ν = 1/2 as the tunneling strength becomes sufficiently large.