DFT + U + V Study of Magnetic Ordering in Single-Layer Pentahexoctite: Implications for Magnetic Device Platforms
Sejoong Kim
Abstract:In this work, we investigate the electronic and magnetic
properties
of single-layer pentahexoctite, a two-dimensional carbon allotrope
patterned by pentagons, hexagons, and octagons. Using density functional
theory (DFT) calculations incorporating on-site and intersite Coulomb
interactions, we find that type-II Dirac Fermions are formed by a
nearly flat band intersecting with a dispersive band at the Fermi
level. We further examine the physical origin of nearly flat bands
of pentahexoctite. Constructing ab ini… Show more
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