| | |
| | |
Stat |
Members: 3667 Articles: 2'599'751 Articles rated: 2609
18 February 2025 |
|
| | | |
|
Article overview
| |
|
Upstream neutral modes in the fractional quantum Hall effect regime: heat waves or coherent dipoles | Y. Gross
; M. Dolev
; M. Heiblum
; V. Umansky
; D. Mahalu
; | Date: |
1 Sep 2011 | Abstract: | Chiral counter propagating (upstream) neutral edge modes, which were
predicted to be present in hole-conjugate states [1], were observed recently in
a variety of fractional quantum Hall states (
u=2/3,
u=3/5,
u=8/3,
u=5/2), via measurement of excess noise resulting from partitioning of the
modes [2, 3]. Particularly noticeable was the observation of such modes in the
$
u=5/2$ fractional state - as it sheds light on the non-abelian nature of the
state’s wavefunction. Yet, the nature of these unique, upstream, chargeless
modes and the microscopic process in which they generate shot noise, are not
understood. By studying the ubiquitous $
u=2/3$ state, we found that the
excess noise that is being created by ’colliding’ two upstream neutral modes on
a narrow constriction is consistent with a simple model of local heating. We
report also on a dual process: partitioning a downstream charge mode gives
birth to an upstream neutral mode. In this process, drawing energy from the
charge mode at the partitioning constriction can be viewed as an inelastic
scattering event, which is likely to dephase the partitioned quasiparticles. | Source: | arXiv, 1109.0102 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|