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 12 of 12 for “"Chern Insulator"”.
-
Artificial gauge fields and quantum hall physics in optical lattices
… controlling and probing integer and fractional Chern insulator states and their excitations. The first example is about the implementation of local magnetic fluxes piercing single lattice plaquettes (analogous to those created by a thin solenoid), which plays an important role in Laughlin's …
-
Exploring linear and nonlinear electromagnetic responses in topological materials
… the Kramers Weyl semimetal, and the moiré Chern insulator. We begin this research topic by understanding how charge-density waves impact electric field-induced transport in the topological system: the Weyl semimetal.Research over the past several years has reinvigorated the examination of …
-
Exact diagonalization study of strongly correlated topological quantum states
… phases in experiments. We studied the fractional Chern insulator and its transition to uni-directional stripes of particles. In addition, we studied topological Mott insulators with spontaneous time-reversal symmetry breaking induced by interaction. We also studied emergent kinetics in …
-
Emergent Quantum Phenomena in Magic-Angle Twisted Graphene Superlattices
… topology in magic-angle graphene, a fractional Chern insulator phase was realized at low magnetic fields. These results provide a robust and versatile platform for investigating emergent phenomena in two dimensions.
-
Aspects of Moiré Quantum Matter
… formation of Hall crystals with tunable Chern numbers, and novel fractional Chern insulator collective mode physics in the context of modulated Landau levels. We also show that a class of models comprising itinerant electrons strongly coupled to skyrmion-like magnetic textures, closely …
-
Dynamics of Chiral Fermions
… two right-moving fermions on one edge of a thin Chern insulator. The partner mirror fermions are localised on the opposing edge. We turn on symmetry preserving six-fermion gapping interactions on one edge of the Chern insulator to gap the doublers whilst preserving an anomaly free $U(1)$ chiral …
-
The Electronic Compressibility of Rhombohedral Graphene Multilayers
… layer antiferromagnetism, correlation-driven Chern insulators, and thermodynamic signatures of potential Wigner crystallization. We also study the electronic compressibility of R5G aligned to a hexagonal boron nitride (hBN) substrate to form a moiré superlattice. Motivated by the recent …
-
Scanning tunneling microscopy studies of a tunable topological insulator and magnetic Weyl semimetal
… After construction, the tunable topological insulator system Ge(Bix,Sb1-x)2Te4 and the magnetic Weyl semimetal Co3Sn2S2 were studied. In Ge(Bix,Sb1-x)2Te4, increasing Sb substitution effectively electron dopes the sample and moves the Dirac point from 300 meV below the Fermi energy to …
-
Quasiparticles in Quantum Many-Body Systems
… and hence become unsuitable for the fractional Chern insulator implementations. The special features of topologically ordered phases make these difficult to probe and hence the detection of topological quantum phase transitions becomes challenging. The existing probes suffer from shortcomings …
-
Higher-order topological phases with crystalline symmetries
Topological insulators (TIs) that are insulating in the bulk but conducting at surfaces have been thoroughly studied for decades. Recently, a new class of TIs, dubbed the higher-order topological insulator (HOTI), has been discovered. Unlike conventional TIs, it is gapped at the boundaries but host …
-
Topological Insulating States in Photonics and Acoustics
<p>Recent surge of interest in topological insulators, insulating in their interior but conducting at the surfaces or interfaces of different domains, has led to the discovery of a variety of new topological states, and their topological invariants are characterized by numerous approaches in the …
-
Investigating Topological Quantum Matter: Machine Learning Topological Phases, Topological Quantum Codes, Interplay of Disorder and Topology via Transport Phenomena and Phase Transitions
… time reversal-breaking disorder nucleates Chern-insulator puddles whose Chern markers satisfy ⟨|C|⟩≈χ, converting fragile Euler topology into quantised domains. Collectively the thesis delivers four broadly applicable advances: (i) a symmetry-exact neural-network representation of Kitaev …