Two-Dimensional Kagome Lattices Made of Hetero Triangulenes Are Dirac Semimetals or Single-Band Semiconductors

Jing Y, Heine T (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of the American Chemical Society American Chemical Society

Book Volume: 141

Pages Range: 743-747

Journal Issue: 2

DOI: 10.1021/jacs.8b09900

Abstract

Here we discuss, based on first-principles calculations, two-dimensional (2D) kagome lattices composed of polymerized heterotriangulene units, planar molecules with D 3h point group containing a B, C, or N center atom and CH 2 , O, or CO bridges. We explore the design principles for a functional lattice made of 2D polymers, which involves control of π-conjugation and electronic structure of the knots. The former is achieved by the chemical potential of the bridge groups, while the latter is controlled by the heteroatom. The resulting 2D kagome polymers have a characteristic electronic structure with a Dirac band sandwiched by two flat bands and are either Dirac semimetals (C center), or single-band semiconductors - materials with either exclusively electrons (B center) or holes (N center) as charge carriers of very high mobility, reaching values of up to ∼8 × 10 ³ cm ² V ^-1 s ^-1 , which is comparable to crystalline silicon. ©

Involved external institutions

Universität Leipzig

Germany (DE)

How to cite

APA:

Jing, Y., & Heine, T. (2019). Two-Dimensional Kagome Lattices Made of Hetero Triangulenes Are Dirac Semimetals or Single-Band Semiconductors. Journal of the American Chemical Society, 141(2), 743-747. https://dx.doi.org/10.1021/jacs.8b09900

MLA:

Jing, Yu, and Thomas Heine. "Two-Dimensional Kagome Lattices Made of Hetero Triangulenes Are Dirac Semimetals or Single-Band Semiconductors." Journal of the American Chemical Society 141.2 (2019): 743-747.

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