Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Pruschke, Thomas Prof. Dr."
Now showing items 1-8 of 8
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Dual Fermion Approach to Disordered Correlated Systems
(2015-11-05)Disorder is ubiquitous in real materials and influences the physical properties like the conductivity to varying degrees. If electron-electron interactions are strong, theoretical and numerical treatment of these systems ... -
Superconductivity and Antiferromagnetism in the Kondo-Lattice Model
(2013-10-11)In this thesis, antiferromagnetic and superconducting order in the Kondo-lattice model is investigated by means of the dynamical mean-field theory (DMFT) in combination with the numerical renormalization group (NRG) method. ... -
Scanning tunneling spectroscopy of magnetic bulk impurities: From a single Kondo atom towards a coupled system
(2013-03-06)This thesis focuses on single impurity Kondo physics and the transition towards coupled Kondo systems in real space. Single magnetic iron and cobalt and non magnetic silver atoms embedded below a copper surface are ... -
Spectral functions of low-dimensional quantum systems
(2013-01-24)The focus of this thesis is set on the calculation of spectral functions for low-dimensional quantum systems. At first the quantum many-body problem is introduced and the related spectral functions of interest are defined. ... -
Imaginary-Time Approach to the Kondo Effect out of Equilibrium
(2012-07-10)An artificial quantum dot which is attached to two leads exhibits a non-equilibrium Kondo effect due to the presence of a finite source-drain voltage. The construction of a theory which provides numerically computable ... -
Thermodynamic and spectral properties of quantum many-particle systems
(2011-02-15)The investigation of quantum many-particle systems is a central goal of modern condensed-matter physics. Complex physical phenomena such as high-temperature superconductivity, heavy fermion ... -
Measuring the Free Energy of Self-assembling Systems in Computer Simulation
(2010-01-27)Membrane fusion is involved in a multitude of biological processes like endo- and exocytosis, viral infection or synaptic release. The detailed mechanism, however, is not well understood ... -
Magneto-microphotoluminescence spectroscopy as a tool for the study of disorder in semiconductor quantum wells
(2007-06-13)This work contributes to the understanding of the relation between structural and optical properties of dimensionally reduced semiconductor heterostructures at the model system of thin ...