Local Thermometry of Neutral Modes on the Quantum Hall Edge

DSpace/Manakin Repository

Local Thermometry of Neutral Modes on the Quantum Hall Edge

Citable link to this page

 

 
Title: Local Thermometry of Neutral Modes on the Quantum Hall Edge
Author: Venkatachalam, Vivek; Hart, Sean; Pfeiffer, Loren; West, Ken; Yacoby, Amir

Note: Order does not necessarily reflect citation order of authors.

Citation: Venkatachalam, Vivek, Sean Hart, Loren Pfeiffer, Ken West, and Amir Yacoby. 2012. Local Thermometry of Neutral Modes on the Quantum Hall Edge. Nature Physics 8, no. 9: 676–681.
Full Text & Related Files:
Abstract: Electrons in two dimensions and strong magnetic fields can form an insulating two-dimensional system with conducting one-dimensional channels along the edge. Electron interactions in these edges can lead to independent transport of charge and heat, even in opposite directions. Here, we heat the outer edge of such a quantum Hall system using a quantum point contact. By placing quantum dots upstream and downstream from the heater, we measure both the chemical potential and temperature of that edge to study charge and heat transport, respectively. We find that charge is transported exclusively downstream, but heat can be transported upstream when the edge has additional structure related to fractional quantum Hall (FQH) physics. Surprisingly, this can occur even when the bulk is in an integer quantum Hall state and the edge contains no signatures of FQH charge transport. We also find an unexpected bulk contribution to heat transport at ν = 1.
Published Version: doi:10.1038/nphys2384
Other Sources: http://arxiv.org/pdf/1202.6681v1.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12111443
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters