Titlebook: Advances in Solid State Physics; Bernhard Kramer Book 2003 Springer-Verlag Berlin Heidelberg 2003 condensed matter.condensed matter physic

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Polymer-Defined Semiconductor Nanostructures, "top-down" approach, either micelles formed by diblock-copolymers or other self-assembled patterns like "breath figures" or imprints of colloids in polymer films are used for the formation of metal masks of different sizes on semiconductors in a first preparation step. These metal masks are then us

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jealousy

Electron Coherence in Mesoscopic Kondo Wires, phase coherence time extracted from the weak antilocalisation shows a pronounced plateau in a temperature region of . mK - . mK, associated with the phase breaking due to the Kondo effect. Below the Kondo temperature, the phase coherence time increases, as expected in the framework of Kondo physics

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Scaling of the Quantum Hall Plateau Transition,ependence in the variable-range hopping regime allow to determine the localization length ξ, confirming the predicted scaling behavior ξ ∝ |B-B.|. with a universal critical exponent γ=2.3±0.2. For devices of reduced size we observe conductance fluctuations at the plateau transition. Their temperatur

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Tidious

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Real-Space Renormalization and Energy-Level Statistics at the Quantum Hall Transition,ied to the Chalker-Coddington network model, reproduces the critical distribution of the . transmission coefficients, i.e., two-terminal conductances, P.(G), with very high accuracy. The RG flow of . at energies away from the transition yields a value of the critical exponent, ν.=2.39±0.01, that agr

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季雨

LDA+DMFT Investigations of Transition Metal Oxides and f-Electron Materials, mean-field theory (DMFT) has been proven to be a powerful tool for the realistic modeling of strongly correlated electron systems. This paper provides a brief introduction to this novel computational technique and presents the results for two prime examples of strongly correlated electron systems,

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