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 “"Hofstadter butterfly"”.
-
Properties of the α-T3 Model
… Also in a magnetic field, we calculate the Hofstadter butterfly spectra of the α-T3 lattice, and detail the evolution of the Hofstadter butterfly as it changes periodicity by a factor of three as we vary α between the two limiting cases.
-
Crystalline Topological Invariants in Invertible Fermionic States and Fractional Chern Insulators
… numerical methods are demonstrated using the Hofstadter model, which exhibits non-zero Chern number and magnetic field. These invariants, together with several established invariants in the literature, gives a complete classification of ground states and reveal novel colorings of the …
-
Spectral gaps for many-particle systems, semiclassical analysis of graphene, and quantum dynamics
… methods, we analyze the self-similarity in the Hofstadter butterfly and the metal/-insulator transition in both models. In the second chapter of part two, we analyze, using again semiclassical techniques, the squeezing of bands in a model of twisted bilayer graphene and related properties such …
-
Vortex Configurations Of Bosons In Rotating Optical Lattices
… between these vortex structures and the Hofstadter-butterfly spectrum of free particles on a rotating lattice. We then investigate vortex configurations within a harmonically trapped Bose-Einstein condensate in a rotating optical lattice. We find that proximity to the Mott insulating …
-
Electronic properties and device applications of rotationally controlled van der Waals heterostructures
… fields, we also observe the emergence of a Hofstadter butterfly in the energy spectrum, with four-fold degenerate Landau levels (LLs), and broken symmetry quantum Hall states at filling factors, ν = ±1, ±2, ±3. We demonstrate dual-gated tungsten diselenide (WSe₂) interlayer tunneling …
-
High temperature quantum transport in graphene/hexagonal-boron nitride heterostructures
… experimental observation of the long sought Hofstadter butterfly, which addresses the electronic dispersion of electrons in a periodic potential and magnetic field. Here, we again go to elevated temperatures, where all the spectral gaps related to Hofstadter butterflies are completely …
-
Hollow condensates, topological ladders and quasiperiodic chains
… on-site modulation and is equivalent to the Hofstadter problem at its critical point. Generalizations of the AAH modelhave been studied numerically and a generalized self-dual AAH model has been proposed and analytically analyzed by S. Ganeshan, J. Pixley and S. Das Sarma (GPD). For extended …
-
Transport And Optical Properties Of Low-Dimensional Complex Systems
<p>Over the last five years of my research work, I, my research was mainly concerned with certain crucial tunneling, transport and optical properties of novel low-dimensional graphitic and carbon-based materials as well as topological insulators. Both single-electron and many-body problems were …