Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"impurity model"”.
-
Calculation of the optical conductivity for the Anderson impurity model using the slave boson technique
The optical conductivity of the Anderson impurity mode l has been calculated by emp l oying the slave boson technique and an expansion in powers of l i N, where N is the d egeneracy o f the f electron level . This method has been used to find the effective mass of the conduction electrons for …
-
Cluster Dynamical Mean-Field Theory: Applications to High-Tc Cuprates and to Quantum Chemistry
… high-Tc cuprate superconductors. The approximate models that enter the theoretical framework will be discussed afterwards. Some quantum chemical methods for many-body quantum systems are included for review. Next we present the numerical methods employed in our study. The formalism of the …
-
Measurement of electron-electron interactions in one dimension with tunnelling spectroscopy
… of fermions is described by the Fermi liquid model, whose most prominent result is that, instead of studying the behaviour of individual particles, it is better to describe the emergent phenomena of the whole system, known as quasiparticles. These are collective modes of excitations born out …
-
Método atômico para o modelo de Anderson em presença de um campo magnético externo.
… develop the atomic method (AM) for the Anderson impurity model under an external magnetic field. The Green s functions (GF) representing the exact solution of the impurity problem is written in terms of an effective cumulant, that in the atomic method is replaced by the atomic cumulant obtained …
-
The study of many-electron systems
… interacting systems. Two important many-particle models, the Anderson model and the Hubbard model, and their electromagnetic properties have been investigated in many parameter regimes, and applied to physical systems. An Anderson single-impurity model Hamiltonian based calculation of the magnetic …
-
Renormalization for insulating states of matter
… Specifically, we explore the periodic Anderson impurity model with spin-orbit interactions, using the slave-particle method. As the thermopower is related to the entropy per carrier, particle-hole asymmetry and a large density of states at the chemical potential make Kondo insulator an ideal …
-
Theoretical study of Kondo effect and related transport properties in topological insulator systems
… Coulomb blockade and Kondo regime. An Anderson impurity model is applied to a TIQD system coupled to two external leads, and we show that the model realizes the spin-orbital Kondo effect at the Dirac point where the edge states are not split by a finite-size effect, leading to an additional …
-
TENSOR NETWORKS FOR OPEN QUANTUM SYSTEMS
… the time evolution of a kicked Ising model, as a way to benchmark the performance of the hybrid approach.