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Self-Organized Structures on Flat Crystals: Nanowire Networks Formed by Metal Evaporation
Nanotechnology often requires fabricating large, well-ordered assemblies of nanoscopic components on the surface of a substrate. It has been...
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Scale Invariance and Dynamic Phase Transitions in Diffusion-Limited Reactions
Many systems that can be described in terms of diffusion-limited `chemical' reactions display non-equilibrium continuous transitions separating...
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Pulsed Laser Deposition (PLD) -- A Versatile Thin Film Technique
Pulsed laser deposition (PLD) is for many reasons a versatile technique. Since with this method the energy source is located outside the chamber, the...
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High Critical Fields and Currents in Mechanically Alloyed MgB$_2$
The combination of high critical fields Hc2 and irreversibility fields H^irr and a critical current density jc for example in thin films render MgB2...
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Decoherence Due to Discrete Noise in Josephson Qubits
We study decoherence produced by a discrete environment on a charge Josephson qubit by introducing a model of an environment of bistable fluctuators....
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Terahertz Quantum Cascade Lasers
Unipolar semiconductor injection lasers emitting at THz frequencies (4.3 THz, λ∼69 μm and 3.5 THz, λ∼85 μm) are discussed. The devices are based on...
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Magnetic Liquid Patterns in Space and Time
Macroscopic surface patterns of magnetic fluids are experimentally investigated for four different configurations of the liquid layer, and the...
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Superconductivity from the Repulsive Electron Interaction – from 1D to 3D
There is a growing realisation that the high-Tc superconductivity found in the cuprates in the 1980's has an electronic mechanism – namely,...
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Conductance Statistics near the Anderson Transition
Since the pioneering work of Anderson [2] we know that disorder localizes electrons. At zero temperature any small amount of disorder localizes all...
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Spin Blockades in the Transport through Quantum Dots
The low-temperature electronic transport properties of sub-micrometer sized quantum dots, coupled to leads via tunnel barriers [1], are among the...
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On the Critical Exponent of the Anderson Transition
In the elementary course of quantum mechanics, we learn that there are two kinds of eigenstates, i.e., bound states and scattering states. In 1958...
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Coherent Random Lasing and `Almost Localized' Photon Modes
There exists a formal analogy between the Schrödinger equation describing electron motion in a random potential, and the scalar wave equation for...
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Probing the Parity and Spin State
Classification into classes of superconductors with singlet and triplet pairing, respectively, needs information on the parity and spin state of the...
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Semiconductor Few-Electron Quantum Dots as Spin Qubits
The spin of an electron placed in a magnetic field provides a natural two-level system suitable as a qubit in a quantum computer[1]. In this work, we...
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Ion Microscopy on Diamond
Because of its physical properties (strong radiation hardness, wide energy gap with a consequent extremely low dark current, very large electron and...
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Laser Ablation-Deposited CN x Thin Films
Amorphous CN x thin films were deposited at room temperature by pulsed laser ablation of graphite targets in a...
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Defects in CVD Diamond Films from Their Response as Nuclear Detectors
CVD diamond films can be used to realize nuclear detectors with outstanding working capability in harsh environments. Since efficient particle...
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Sol-Gel Approaches to Photonic Crystal Systems
A prerequisite for an efficient ”molding the flow of light” by photonic crystals is the molding of materials in desired nanostructures. Very often,...
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Probing the Vortices: Lattice Symmetry and Internal Structure
A spatial variation of the superconducting properties occurs when a magnetic field is present perpendicular to the surface of a type-II...
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Raman Spectroscopy and Optical Properties of Amorphous Diamond-Like Carbon Films
The Raman spectroscopy and optical characterization of amorphous hydrogen-free diamond-like carbon films is described. The samples were prepared by...