Download presentation
Presentation is loading. Please wait.
Published byCharles Stanley Modified over 10 years ago
1
Coulomb Drag in a Strongly Correlated Double Layer 2D Electron System
Melinda Kellogg James Eisenstein Loren Pfeiffer Ken West
2
Coulomb Drag V I e- e- e- e- Al0.9Ga0.1As nlayer = 5.3 x1010 cm-2
~ 106 cm2/V•s GaAs GaAs 180Å 99Å 180Å
3
Bilayer QHE Phase Diagram
__ d l Tunneling Murphy et al., 1994
4
Temperature Dependence in Zero Field
Deviation from quadratic behavior -- no phonon peak
5
Above Tc, Pairing Fluctuations
Kim, Nayak, Demler & Das Sarma 2000 Bonesteel, McDonald, Above Tc, Pairing Fluctuations Ussishkin & Stern, 1998
6
Summary the drag resistivity at ntotal = 1.
We have discovered an enhancement in the drag resistivity at ntotal = 1. This enhancement appears well above the bilayer QHE phase boundary. This enhancement persists when the layer densities are unbalanced.
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.