Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-05-14
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.91.216804
The charge of fractionally charged quasiparticles, proposed by Laughlin to explain the fractional quantum Hall effect (FQHE), was recently verified by measurements. Charge q=e/3 and e/5 (e is the electron charge), at filling factors nu=1/3 and 2/5, respectively, were measured. Here we report the unexpected bunching of fractional charges, induced by an extremely weak backscattering potential at exceptionally low electron temperatures (T<10 mK) - deduced from shot noise measurements. Backscattered charges q=nu e, specifically, q=e/3, q=2e/5, and q<3e/7, in the respective filling factors, were measured. For the same settings but at an only slightly higher electron temperature, the measured backscattered charges were q=e/3, q=e/5, and q=e/7. In other words, bunching of backscattered quasiparticles is taking place at sufficiently low temperatures. Moreover, the backscattered current exhibited distinct temperature dependence that was correlated to the backscattered charge and the filling factor. This observation suggests the existence of 'low' and 'high' temperature backscattering states, each with its characteristic charge and characteristic energy.
Chung Yiu-Cho
Heiblum Moty
Umansky Vladimir
No associations
LandOfFree
Scattering of Bunched Fractionally Charged Quasiparticles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Scattering of Bunched Fractionally Charged Quasiparticles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scattering of Bunched Fractionally Charged Quasiparticles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-80780