arXiv subjects

Heinz-Olaf Müller

Publications and source records attributed to Heinz-Olaf Müller.

4 recordsLinked to original sources

arXiv2000

Modelling background charge rearrangements near single-electron transistors as a Poisson process

Background charge rearrangements in metallic single-electron transistors are modelled in two-level tunnelling systems as a Poisson process with a scale parameter as only variable. The model explains the recent observation of asymmetric Coulomb blockade peak spacing distributions in metallic single-electron transistors. From the scale parameter we estimate the average size of the tunnelling systems, their density of states, and the height of their energy barrier. We conclude that the observed background charge rearrangements predominantly take place in the substrate of the single-electron transistor.

cond-mat.mes-hall↗

arXiv1997

Thermal Crossover between Ultrasmall Double and Single Junction

The crossover from double-junction behavior to single-junction behavior of ultrasmall tunnel junctions is studied theoretically in a scanning-tunneling microscope setup. The independently variable tip temperature of the microscope is used to monitor the transition between both regimes.

cond-mat.mes-hall↗

arXiv1997

Distribution of Transmitted Charge through an Ultrasmall Double-Tunnel Junction

The transmission of charge through an ultrasmall double junction is considered with Coulomb effects but at zero temperature. We construct an equation which describes the time development of the transmission probability of charges and solve this equation in terms of a recursion relation. The results are compared with the double junction without charging effects.

cond-mat.mes-hall↗

arXiv1996

Ultrasmall double junction in terms of orthogonal polynomials

The ``orthodox theory'' of a single electron double junction is dealt with. It is shown that the stationary solution of the underlying master equation allows the construction of any time-dependent solution in terms of orthogonal polynomials. The approach pays off if the stationary solution becomes simple. Two special cases are considered. We use the time-dependent solution to calculate the current noise in these cases.

cond-mat.mes-hall↗