Screening two-dimensional materials with topological flat bands

Topological flat bands from dipolar spin systems.

We propose and analyze a physical system that naturally admits two-dimensional topological nearly flat bands. Our approach utilizes an array of three-level dipoles (effective S=1 spins) driven by inhomogeneous electromagnetic fields. The dipolar interactions produce arbitrary uniform background gauge fields for an effective collection of conserved hard-core bosons, namely, the dressed spin flip...

Computational design of two- dimensional topological materials

The progress in science and technology is largely boosted by the continuous discovery of new materials. In recent years, the state-of-art first-principles computational approach has emerged as a vital tool to enable materials discovery by designing a priori unknown materials as well as unknown properties of existing materials that are subsequently confirmed by experiments. One notable example i...

Two{dimensional Topological Dynamics

Materials Screening Through GPU Accelerated Topological Mapping

depiction of complex void space topology of nano-porous materials. Journal of Chemical Information and Model-ing 2010, 50 (4), 461–469. 20. Oganov, A.R., Ed. Modern Methods of Crystal StructurePrediction. Wiley-VCH: Weinheim, Germany, 2010.21. Ciobanu, C.V.; Wang, C.-Z.; Ho, K.-M. Atomic StructurePrediction of Nanostructures, Clusters, and Surfaces. Wiley-VCH: Weinheim, Germ...

The Partition Function in the Four-Dimensional Schwarz-Type Topological Half-Flat Two-Form Gravity

Abstract We examine the partition functions and the renormalization of the Schwarz-type four-dimensional topological half-flat 2-form gravity model on K3-surface or T 4 up to on-shell one-loop corrections. In this model the bosonic moduli spaces describe an equivalent class of a trio of the Einstein-Kähler forms ( the hyperkähler forms ).We examine the partition functions and the renormalizatio...