High frequency conductivity in the quantum Hall effect
نویسندگان
چکیده
منابع مشابه
High frequency conductivity in the quantum Hall e!ect
We present high frequency measurements of the diagonal conductivity of a two-dimensional electron system in the integer quantum Hall regime. The width of the peaks between QHE minima is analyzed within the framework of scaling theory using both temperature (1"100}700 mK) and frequency ( f)6 GHz) in a two parameter scaling ansatz. For the plateau transition width we "nd scaling behaviour for bot...
متن کاملHigh frequency conductivity in the quantum hall regime.
We have measured the complex conductivity sigma(xx) of a two-dimensional electron system in the quantum Hall regime up to frequencies of 6 GHz at electron temperatures below 100 mK. Using both its imaginary and real part we show that sigma(xx) can be scaled to a single function for different frequencies and several transitions between plateaus in the quantum Hall effect. Additionally, the condu...
متن کاملFrequency dependent conductivity in the integer quantum Hall effect
Abstract. Frequency dependent electronic transport is investigated for a two-dimensional disordered system in the presence of a strong perpendicular static magnetic field. The acconductivity is calculated numerically from Kubo’s linear response theory using a recursive Green’s function technique. In the tail of the lowest Landau band, we find a linear frequency dependence for the imaginary part...
متن کاملActivated conductivity in the quantum Hall effect.
Activated dissipative conductivity ¢==o-*~exp(-A/T) and the activated deviation of the Hall conductivity from the precise quanfizafion &r~v=~i e2 /h f~exp ( -A /T ) are studied in a plateau range of the quantum Hall effect. The prefactors cr*~ and o*~ are calculated for the case of a long-range random potential in the fxa~ework of a classical theory. There is a range of temperatures Tx << T<< T...
متن کاملUniversal prefactor of activated conductivity in the quantum Hall effect.
The prefactor of the activated dissipative conductivity in a plateau range of the quantum Hall effect is studied in the case of a long-range random potential. It is shown that due to long time it takes for an electron to drift along the perimeter of a large percolation cluster, phonons are able to maintain quasiequilibrium inside the cluster. The saddle points separating such clusters may then ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 2001
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(01)00266-6