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Akademický článek

Direct band-gap crossover in epitaxial monolayer boron nitride

Autor: C. Elias, P. Valvin, T. Pelini, A. Summerfield, C. J. Mellor, T. S. Cheng, L. Eaves, C. T. Foxon, P. H. Beton, S. V. Novikov, B. Gil, G. Cassabois

Publikováno v: Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)

Insulating hexagonal boron nitride (hBN) is theoretically expected to undergo a crossover to a direct bandgap in the monolayer limit. Here, the authors perform optical spectroscopy measurements on atomically thin epitaxial hBN providing indications o

Externí odkaz: https://doaj.org/article/37ee1074b78f488f83916006346b401a

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Akademický článek

Exciton and Phonon Radiative Linewidths in Monolayer Boron Nitride

Autor: G. Cassabois, G. Fugallo, C. Elias, P. Valvin, A. Rousseau, B. Gil, A. Summerfield, C. J. Mellor, T. S. Cheng, L. Eaves, C. T. Foxon, P. H. Beton, M. Lazzeri, A. Segura, S. V. Novikov

Publikováno v: Physical Review X, Vol 12, Iss 1, p 011057 (2022)

The light-matter interaction in bulk semiconductors is in the strong-coupling regime with hybrid eigenstates, the so-called exciton polaritons and phonon polaritons. In two-dimensional (2D) systems, the translational invariance is broken in the direc

Externí odkaz: https://doaj.org/article/da4eed7dc9d1474b89bea97bb5ddbc91

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Akademický článek

An atomic carbon source for high temperature molecular beam epitaxy of graphene

Autor: J. D. Albar, A. Summerfield, T. S. Cheng, A. Davies, E. F. Smith, A. N. Khlobystov, C. J. Mellor, T. Taniguchi, K. Watanabe, C. T. Foxon, L. Eaves, P. H. Beton, S. V. Novikov

Publikováno v: Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)

Abstract We report the use of a novel atomic carbon source for the molecular beam epitaxy (MBE) of graphene layers on hBN flakes and on sapphire wafers at substrate growth temperatures of ~1400 °C. The source produces a flux of predominantly atomic

Externí odkaz: https://doaj.org/article/3129cbf984284527ac9876d7d8fbcca0

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Akademický článek

High-temperature Brown-Zak oscillations in graphene/hBN moiré field effect transistor fabricated using molecular beam epitaxy

Autor: Oleg Makarovsky, Richard J. A. Hill, Tin S. Cheng, Alex Summerfield, Takeshi Taniguchi, Kenji Watanabe, Christopher J. Mellor, Amalia Patanè, Laurence Eaves, Sergei V. Novikov, Peter H. Beton

Publikováno v: Communications Materials, Vol 5, Iss 1, Pp 1-6 (2024)

Abstract Graphene placed on hexagonal boron nitride (hBN) has received significant interest due to its excellent electrical performance and physics phenomena, such as superlattice Dirac points. Direct molecular beam epitaxy growth of graphene on hBN

Externí odkaz: https://doaj.org/article/313606db9c814b759d7f0958af45188d

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Akademický článek

Cathodoluminescence spectroscopy of monolayer hexagonal boron nitride

Autor: Kohei Shima, Tin S. Cheng, Christopher J. Mellor, Peter H. Beton, Christine Elias, Pierre Valvin, Bernard Gil, Guillaume Cassabois, Sergei V. Novikov, Shigefusa F. Chichibu

Publikováno v: Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)

Abstract Cathodoluminescence (CL) spectroscopy is a suitable technique for studying the luminescent properties of optoelectronic materials because CL has no limitation on the excitable bandgap energy and eliminates ambiguous signals due to simple lig

Externí odkaz: https://doaj.org/article/d9f906e2499b4a14b6b4e72c9ecf4f02

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Akademický článek

Fullerenes as adhesive layers for mechanical peeling of metallic, molecular and polymer thin films

Autor: Maria B. Wieland, Anna G. Slater, Barry Mangham, Neil R. Champness, Peter H. Beton

Publikováno v: Beilstein Journal of Nanotechnology, Vol 5, Iss 1, Pp 394-401 (2014)

We show that thin films of C60 with a thickness ranging from 10 to 100 nm can promote adhesion between a Au thin film deposited on mica and a solution-deposited layer of the elastomer polymethyldisolaxane (PDMS). This molecular adhesion facilitates t

Externí odkaz: https://doaj.org/article/b30ac55068d548c39a885bbdc679f493

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Square, hexagonal, and row phases of PTCDA and PTCDI on Ag-Si(111)square root(3) x square root(3)R30 degrees

Autor: J C, Swarbrick, J, Ma, J A, Theobald, N S, Oxtoby, J N, O'Shea, N R, Champness, P H, Beton

Publikováno v: The journal of physical chemistry. B. 109(24)

We have investigated the ordered phases of the perylene derivatives perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride (PTCDA) and the imide analogue PTCDI on the Ag-Si(111)square root(3) x square root(3)R30 degrees surface using scanning tunneli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::0347759a047b323eea7027c14c81a97e
https://pubmed.ncbi.nlm.nih.gov/16852501

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