Continuous phase transition between bosonic integer quantum Hall liquid and trivial insulator: evidences for deconfined quantum criticality
| Autor: | Tian-Sheng Zeng, D. N. Sheng, Wei Zhu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Phase transition Strongly Correlated Electrons (cond-mat.str-el) FOS: Physical sciences 02 engineering and technology Quantum entanglement Renormalization group Quantum Hall effect 021001 nanoscience & nanotechnology 01 natural sciences symbols.namesake Condensed Matter - Strongly Correlated Electrons Dirac fermion Quantum critical point Quantum mechanics 0103 physical sciences symbols 010306 general physics 0210 nano-technology Quantum Critical field |
| Popis: | The deconfined quantum critical point, a prototype Landau-forbidden transition, could exist in principle in the phase transitions involving symmetry protected topological phase, however, examples of such kinds of transition in physical systems are rare beyond one-dimensional systems. Here, using density-matrix renormalization group calculation, we unveil a bosonic integer quantum Hall phase in two-dimensional correlated honeycomb lattice, by full identification of its internal structure from the topological $\mathbf{K}$ matrix. Moreover we demonstrate that imbalanced periodic chemical potentials can destroy the bosonic integer quantum Hall state and drive it into a featureless trivial (Mott) insulator, where all physical observables evolve smoothly across the critical point. At the critical point the entanglement entropy reveals a characteristic scaling behavior, which is consistent with the critical field theory as an emergent QED$_3$ with two flavors of Dirac fermions. 6 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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