Hierarchies of Hofstadter butterflies in 2D covalent organic frameworks

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

The Hofstadter butterfly is one of the first and most fascinating examples of the fractal and self-similar quantum nature of free electrons in a lattice pierced by a perpendicular magnetic field. However, the direct experimental verification of this effect on single-layer materials is still missing as very strong and inaccessible magnetic fields are necessary. For this reason, its indirect experimental verification has only been realized in artificial periodic 2D systems, like moiré lattices. The only recently synthesized 2D covalent organic frameworks might circumvent this limitation: Due to their large pore structures, magnetic fields needed to detect most features of the Hofstadter butterfly are indeed accessible with today technology. This work opens the door to make this exotic and theoretical issue from the 70s measurable and might solve the quest for the experimental verification of the Hofstadter butterfly in single-layer materials. Moreover, the intrinsic hierarchy of different pore sizes in 2D covalent organic framework adds additional complexity and beauty to the original butterflies and leads to a direct accessible playground for new physical observations.

Details

OriginalspracheEnglisch
Aufsatznummer16
Seitenumfang6
Fachzeitschriftnpj 2D materials and applications
Jahrgang7
Ausgabenummer1
PublikationsstatusVeröffentlicht - 25 März 2023
Peer-Review-StatusJa

Externe IDs

WOS 000957379100002
ORCID /0000-0001-5873-8751/work/134176701
ORCID /0000-0002-2580-0560/work/142241718

Schlagworte

Schlagwörter

  • Bloch electrons, Dirac fermions, Graphene, Crystalline, Monolayers, Spectrum, Lattice, States, Phase