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The Single Quantum Dot Photodiode -- A Two-Level System with Electric Contacts
Semiconductor quantum dots can be described as quantum mechanical two-level systems. Under the influence of strong electromagnetic driving fields and...
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A Sharp Eye on Thin Films -- Advances through Synchrotron Radiation
The availability of high-brilliance synchrotron radiation has opened new avenues in thin-film research. In recent years new experimental techniques...
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Another Semiconductor Revolution: This Time It's Lighting!
A 40 year old semiconductor technology, Light Emitting Diodes (LEDs) has steadily improved performance and cost to a point where it will move from...
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Field-Induced Superconductivity in Films with Magnetic Dots
Magnetic-field-induced superconductivity (FIS) is a rare phenomenon that has been observed up to now in only very few materials. We show that this...
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New Challenges in Optical Coating Design
Modern mathematical algorithms allow to theoretically generate thin film designs that fit nearly any reasonable specification. Nevertheless, as...
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Physics of Carbon Nanotubes
A brief review is given on electronic and transport properties of carbon nanotubes mainly from a theoretical point of view. The topics include a...
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Non-equilibrium Transport and Relaxation in Diffusive Nanowires with Kondo Impurities
Combining non-equilibrium transport with spectroscopic measurements provides a unique tool for the investigation of the microscopic processes in...
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III-V and II-VI Mn-Based Ferromagnetic Semiconductors
A review is given of advances in the field of carrier-controlled ferromagnetism in Mn-based diluted magnetic semiconductors and their nanostructures....
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The Chemical Route in Plasma Enhanced Low Pressure Synthesis of c-BN
In the last three years it was shown that plasma enhanced chemical vapor deposition (PECVD) is an interesting alternative to the physical route. This...
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Decoherence of Flux Qubits Coupled to Electronic Circuits
On the way to solid-state quantum computing, overcoming decoherence is the central issue. In this contribution, we discuss the modeling of...
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Atomic Structure of Alkali Halide Surfaces
The atomic structure of surfaces of alkali halide crystals has been revealed by means of high-resolution dynamic force microscopy. True atomic...
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Optical Spectroscopy of Low-Dimensional Quantum Spin Systems
Low-dimensional quantum spin systems display fascinating excitation spectra. In recent years, optical spectroscopy was shown to be a powerful tool...
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Electron Coherence in Mesoscopic Kondo Wires
We present measurements of the magnetoresistance of long and narrow quasi one-dimensional gold wires containing magnetic iron impurities. The...
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Turbulence
Recent progress in the physics of developed turbulence is presented. After summarizing the relevant notions as the Reynolds number Re and the...
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LDA+DMFT Investigations of Transition Metal Oxides and f-Electron Materials
In the last few years LDA+DMFT, the merger of conventional band structure theory in the local density approximation (LDA) with the many-body...
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New Developments with Magnetic Tunnel Junctions
Besides sensors, magnetic random access memory (MRAM) and hard disk read heads, much more possible applications are still ahead for the new...
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Stress, Strain and Magnetic Anisotropy: All Is Different in Nanometer Thin Films
The application of the crystal curvature technique for stress measurements at surfaces and in films is presented. Important aspects regarding sample...
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Spin-Galvanic Effect and Spin Orientation Induced Circular Photogalvanic Effect in Quantum Well Structures
The spin-galvanic effect and the spin polarization induced circular photogalvanic effect generated by homogeneous optical excitation with circularly...
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Magnetisation Reversal of Stripe Arrays -- Comparison of MOKE with Polarized Neutron Reflectivity
Laterally structured magnetic films will be important components of future magnetic storage elements. From the aspect of application, remagnetization...
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Nanoscopic Quantum Rings: A New Perspective
With rapid advances in fabrication of nano-scale devices, quantum rings of nanometer dimensions that are disorder free and contain only a few...