Role of density imbalance in an interacting bilayer hole system |
| |
Authors: | Tutuc E Melinte S De Poortere E P Pillarisetty R Shayegan M |
| |
Institution: | Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA. |
| |
Abstract: | We study interacting GaAs hole bilayers in the limit of zero interlayer tunneling. When the layers have equal density, we observe a phase-coherent bilayer quantum Hall state (QHS) at a total filling factor nu=1, flanked by a reentrant insulating phase at nearby fillings which suggests the formation of a pinned, bilayer Wigner crystal. As we transfer charge from one layer to another, the phase-coherent QHS becomes stronger, evincing its robustness against charge imbalance, but the insulating phase disappears, suggesting that its stability requires the commensurability of the two layers. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|