Fedorov, A., Praveen, C. S., Verbitskiy, N. I., Haberer, D., Usachov, D., Vyalikh, D. V., Nefedov, A., Woll, C., Petaccia, L., Piccinin, S., Sachdev, H., Knupfer, M., Buchner, B., Fabris, S. and Gruneis, A. (2015). Efficient gating of epitaxial boron nitride monolayers by substrate functionalization. Physical review B, 92 (12). APS Physics. ISSN 2469-9969

[img]
Preview
PDF
Efficient_gating_of_epitaxial_boron_nitride_monolayers_by_substrate_functionalization.pdf - Published Version

Download (1MB)

Abstract

Insulating hexagonal boron nitride monolayers (hBN) are best known for being resistant to chemical functionalization. This property makes hBN an excellent substrate for graphene heterostructures, but limits its application as an active element in nanoelectronics where tunable electronic properties are needed. Moreover, the two-dimensional–materials’ community wishes to learn more about the adsorption and intercalation characteristics of alkali metals on hBN, which have direct relevance to several electrochemistry experiments that are envisioned with layered materials. Here we provide results on ionic functionalization of hBN/metal interfaces with K and Li dopants. By combining angle-resolved photoemission spectroscopy (ARPES), x-ray photoelectron spectroscopy, and density functional theory calculations, we show that the metallic substrate readily ionizes the alkali dopants and exposes hBN to large electric fields and band-energy shifts. In particular, if hBN is in between the negatively charged substrate and the positive alkali ion, this allows us to directly study, using ARPES, the effects of large electric fields on the electron energy bands of hBN.

Item Type: Journal Article
Creators:
CreatorsEmailORCID
Fedorov, A.UNSPECIFIEDUNSPECIFIED
Praveen, C. S.UNSPECIFIEDUNSPECIFIED
Verbitskiy, N. I.UNSPECIFIEDUNSPECIFIED
Haberer, D.UNSPECIFIEDUNSPECIFIED
Usachov, D.UNSPECIFIEDUNSPECIFIED
Vyalikh, D. V.UNSPECIFIEDUNSPECIFIED
Nefedov, A.UNSPECIFIEDUNSPECIFIED
Woll, C.UNSPECIFIEDUNSPECIFIED
Petaccia, L.UNSPECIFIEDUNSPECIFIED
Piccinin, S.UNSPECIFIEDUNSPECIFIED
Sachdev, H.UNSPECIFIEDUNSPECIFIED
Knupfer, M.UNSPECIFIEDUNSPECIFIED
Buchner, B.UNSPECIFIEDUNSPECIFIED
Fabris, S.UNSPECIFIEDUNSPECIFIED
Gruneis, A.UNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-81470
DOI: 10.1103/PhysRevB.92.125440
Journal or Publication Title: Physical review B
Publisher: APS Physics
ISSN: 2469-9969
Volume: 92
Number: 12
Subjects: Natural sciences and mathematics
Physics
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Institute of Physics II
Language: English
Date: 15 September 2015
Funders: European Community FP7 CALIPSO (Grant No. 312284) Transnational Access Program, NanoCF, ERC Grant No. 648589 - SUPER-2D, Russian Science Foundation (Grant No. 14-13-00747), Ministry of Education and Science of the Russian Federation (Grant No. 14.585.21.0004), Austrian Science Fund (FWF), Project No. I 377-N16, Theory and spectroscopy on functionalized graphene, Science and Technology of Nanosystems programme (Project No. 431103- Molecular Building Blocks/Supramolecular Networks), MIUR PRIN, Grant No. 20105ZZTSE, Saint-Petersburg State University Grant No. 11.37.634.2013, BMBF (Grant No. 05K12OD3), RFBR (Grant No. 14-02-31150)
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/8147

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item