2008/01/31 by Wang Yao, Qian Niu · 4 citations
Physics and Astronomy · #Biexciton #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Exciton #Nernst effect #Nernst equation #Physics #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor #Spin (aerodynamics) #Strong Light-Matter Interactions #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.101.106401
published as Phys. Rev. Lett. 101, 106401 (2008) · to appear in Phys. Rev. Lett
arxiv created 2008/07/28 · openalex publication_date 2008/09/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
With the exciton lifetime much extended in semiconductor quantum-well structures, the exciton transport and Bose-Einstein condensation have become a focus of research in recent years. We reveal a momentum-space gauge field in the exciton center-of-mass dynamics due to Berry phase effects. We predict a spin-dependent transport of the excitons analogous to the anomalous Hall and Nernst effects for electrons. We also predict spin-dependent circulation of a trapped exciton gas and instability in an exciton condensate in favor of vortex formation.