量子霍尔双层中激子凝聚的前驱体。
Precursors to Exciton Condensation in Quantum Hall Bilayers.
机构信息
Institute for Quantum Information and Matter, Department of Physics, California Institute of Technology, Pasadena, California 91125, USA.
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
出版信息
Phys Rev Lett. 2019 Aug 9;123(6):066802. doi: 10.1103/PhysRevLett.123.066802.
Tunneling spectroscopy reveals evidence for interlayer electron-hole correlations in quantum Hall bilayer two-dimensional electron systems at layer separations near, but above, the transition to the incompressible exciton condensate at total Landau level filling ν_{T}=1. These correlations are manifested by a nonlinear suppression of the Coulomb pseudogap which inhibits low energy interlayer tunneling in weakly coupled bilayers. The pseudogap suppression is strongest at ν_{T}=1 and grows rapidly as the critical layer separation for exciton condensation is approached from above.
隧道谱学揭示了在总 Landau 能级填充 ν_{T}=1 附近但高于向不可压缩激子凝聚体转变的量子 Hall 双层二维电子系统中，层间电子-空穴相关的证据。这些相关性表现为库仑赝能隙的非线性抑制，该抑制抑制了弱耦合双层中低能层间隧道。赝能隙抑制在 ν_{T}=1 时最强，并随着从上方接近激子凝聚的临界层分离而迅速增长。
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