Structure and electronic properties of stable facets in the 2D material hexagonal boron nitride (hBN) on curved platinum
Artikel i vetenskaplig tidskrift, 2022

A hexagonal boron nitride (hBN) monolayer was grown on a curved crystal c-Pt(331) substrate including all vicinal surfaces between Pt(111) and Pt(110) faces. The surface structure has been studied by a combination of low-energy electron diffraction (LEED) and scanning tunnelling microscopy (STM). We observed that the hBN monolayer covers the entire curved crystal, but induces a faceting subsequent to the growth. We encountered (111), (221), (441), (991), and (110) as stable facets. We assign this faceting to two factors i) a better lattice coincidence and ii) the existence of local covalent bonds and non-local Van der Waals interactions. The electronic structure was characterized by near-edge x-ray absorption fine structure (NEXAFS), X-ray photoemission spectroscopy and angle-resolved photoemission spectroscopy (ARPES). The hBN/Pt(111) has the weakest interacting overlayer system, while the hBN on vicinal surfaces is more strongly bound to the Pt substrate. Additionally, we determined using angle-resolved photoemission measurements (ARPES) that the π band shifts downward when going away from the hBN/Pt(111) surface towards hBN/Pt(110). In the latter case, the π band shift is the largest.

Curved crystal

Epitaxy

Hexagonal boron nitride (h-BN) monolayer

Stable facets

2D materials

Författare

Alaa Mohammed Idris Bakhit

Universidad del Pais Vasco / Euskal Herriko Unibertsitatea

Consejo Superior de Investigaciones Científicas (CSIC)

Khadiza Ali

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Donostia International Physics Center

Anna A. Makarova

Freie Universität Berlin

Igor Píš

Consiglio Nazionale delle Ricerche (CNR)

Federica Bondino

Consiglio Nazionale delle Ricerche (CNR)

F. Schiller

Donostia International Physics Center

Consejo Superior de Investigaciones Científicas (CSIC)

Science Talks

27725693 (eISSN)

Vol. 4 100071

Ämneskategorier (SSIF 2011)

Den kondenserade materiens fysik

DOI

10.1016/j.sctalk.2022.100071

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Senast uppdaterat

2025-03-19