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Continuous Strain Modulation of Moiré Superlattice Symmetry From Triangle to Rectangle.
Small
January 2025
Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan.
Moiré superlattices formed in van der Waals (vdW) bilayers of 2D materials provide an ideal platform for studying previously undescribed physics, including correlated electronic states and moiré excitons, owing to the wide-range tunability of their lattice constants. However, their crystal symmetry is fixed by the monolayer structure, and the lack of a straightforward technique for modulating the symmetry of moiré superlattices has impeded progress in this field. Herein, a simple, room-temperature, ambient method for controlling superlattice symmetry is reported.
View Article and Find Full Text PDFCorrelated Dirac Fermions in Twisted Bilayers of MoS.
Nano Lett
January 2025
Beijing Computational Science Research Center, Beijing 100193, China.
Artificial honeycomb lattices are essential for understanding exotic quantum phenomena arising from the interplay between Dirac physics and electron correlation. This work shows that the top two moiré valence bands in rhombohedral-stacked twisted MoS bilayers (tb-MoS) form a honeycomb lattice with massless Dirac fermions. The hopping and Coulomb interaction parameters are explicitly determined based on large-scale ab initio calculations.
View Article and Find Full Text PDFElectronic band evolution between Lieb and kagome nanoribbons.
Nanotechnology
January 2025
Departamento de Física, Universidade Federal do Ceará, Campus do Pici, 60455-900 Fortaleza, Ceará, Brazil.
We investigate the electronic properties of nanoribbons made out of monolayer Lieb, transition, and kagome lattices using the tight-binding model with a generic Hamiltonian. It allows us to map the evolutionary stages of the interconvertibility process between Lieb and kagome nanoribbons by means of only one control parameter. Results for the energy spectra, the density of states, and spatial probability density distributions are discussed for nanoribbons with three types of edges: straight, bearded, and asymmetric.
View Article and Find Full Text PDFQuantum Thermodynamics of Nonequilibrium Processes in Lattice Gauge Theories.
Phys Rev Lett
December 2024
Joint Center for Quantum Information and Computer Science, NIST and University of Maryland, College Park, Maryland 20742, USA.
A key objective in nuclear and high-energy physics is to describe nonequilibrium dynamics of matter, e.g., in the early Universe and in particle colliders, starting from the standard model of particle physics.
View Article and Find Full Text PDFMany-Body Systems with Spurious Modular Commutators.
Phys Rev Lett
December 2024
Kadanoff Center for Theoretical Physics, University of Chicago, Chicago, Illinois 60637, USA.
Article Synopsis
- A proposed relationship exists between the chiral central charge of gapped, two-dimensional quantum systems and a bulk entanglement measure called the modular commutator.
- Evidence supports this relation, but it is shown in this study that it is not universal across all systems.
- The authors present examples of lattice systems with a zero chiral central charge that still produce nonzero "spurious" modular commutator values, demonstrating this discrepancy in both one- and two-dimensional setups.
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