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We grew 20-100 nm thick films of B20 FeGe by molecular beam epitaxy and investigated the surface structures via scanning tunneling microscopy. We observed the atomic resolution of each of the four possible chemical layers in FeGe(-1-1-1).…

介观与纳米尺度物理 · 物理学 2018-07-03 J. P. Corbett , T. Zhu , A. S. Ahmed , S. J. Tjung , J. J. Repicky , T. Takeuchi , R. K. Kawakami , J. A. Gupta

We investigate the growth of the graphene buffer layer and the involved step bunching behavior of the silicon carbide substrate surface using atomic force microscopy. The formation of local buffer layer domains are identified to be the…

The moir\'e superstructure of graphene grown on metals can drive the assembly of molecular architectures, as iron-phthalocyanine (FePc) molecules, allowing for the production of artificial molecular configurations. A detailed analysis of…

We present a comprehensive study of graphene grown by chemical vapor deposition on copper single crystals with exposed (100), (110) and (111) faces. Direct examination of the as-grown graphene by Raman spectroscopy using a range of visible…

介观与纳米尺度物理 · 物理学 2014-02-03 Otakar Frank , Jana Vejpravova , Vaclav Holy , Ladislav Kavan , Martin Kalbac

This work reports the peculiar properties of a graphene film prepared by the chemical vapor deposition (CVD) of ethylene in high vacuum on a well oriented and carefully cleaned Pt(111) crystal surface maintained at high temperature. In-situ…

介观与纳米尺度物理 · 物理学 2015-06-15 E. Cazzanelli , T. Caruso , M. Castriota , A. R. Marino , A. Politano , G. Chiarello , M. Giarola , G. Mariotto

The study of the nanomechanics of graphene $-$ and other 2D materials $-$ has led to the discovery of exciting new properties in 2D crystals, such as their remarkable in-plane stiffness and out of plane flexibility, as well as their unique…

材料科学 · 物理学 2019-02-14 Filippo Cellini , Francesco Lavini , Claire Berger , Walt de Heer , Elisa Riedo

With the aim of investigating the possible integration of opto-electronic devices, epitaxial GaN layers have been grown on Si(111) SOI and on Si/CoSi2/Si(111) using metalorganic chemical vapor deposition. The samples are found to possess a…

材料科学 · 物理学 2009-11-11 Shengqiang Zhou , A. Vantomme , B. S. Zhang , H. Yang , M. F. Wu

We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and Near Edge X-ray…

Graphene monolayer grown by Si evaporation from the 0001 surface of SiC displays a moir\'e pattern of corrugation whose structure is ambiguous: different measurements and theoretical studies show either protruding bumps surrounded by…

介观与纳米尺度物理 · 物理学 2018-04-27 Tommaso Cavallucci , Valentina Tozzini

In order to exploit the intriguing optical properties of graphene it is essential to gain a better understanding of the light-matter interaction in the material on ultrashort timescales. Exciting the Dirac fermions with intense ultrafast…

Angle-resolved photoemission and X-ray diffraction experiments show that multilayer epitaxial graphene grown on the SiC(000-1) surface is a new form of carbon that is composed of effectively isolated graphene sheets. The unique rotational…

Terrace-sized, single-orientation graphene can be grown on top of a carbon buffer layer on silicon carbide by thermal decomposition. Despite its homogeneous appearance, a surprisingly large variation in electron transport properties is…

介观与纳米尺度物理 · 物理学 2023-03-21 Tobias A. de Jong , Luuk Visser , Johannes Jobst , Ruud M. Tromp , Sense Jan van der Molen

Using low-energy electron microscopy, we study Co intercalation under graphene grown on Ir(111). Depending on the rotational domain of graphene on which it is deposited, Co is found intercalated at different locations. While intercalated Co…

材料科学 · 物理学 2014-03-14 S. Vlaic , A. Kimouche , J. Coraux , B. Santos , A. Locatelli , N. Rougemaille

The atomic and electronic structures of a graphene layer on top of the $(2\times2)$ reconstruction of the SiC (000$\bar{1}$) surface are studied from ab initio calculations. At variance with the (0001) face, no C bufferlayer is found here.…

材料科学 · 物理学 2015-05-13 L. Magaud , F. Hiebel , F. Varchon , P. Mallet , J. -Y. Veuillen

The epitaxial growth of complex oxide thin films provide three avenues to generate unique properties: the ability to influence the 3-dimensional structure of the film, the presence of a surface, and the generation of an interface. In all…

材料科学 · 物理学 2010-05-31 N. J. C. Ingle , A. Yuskauskas , R. Wicks , M. Paul , S. Leung

Using in situ low-energy electron microscopy and density functional theory, we studied the growth structure and work function of bilayer graphene on Pd(111). Low-energy electron diffraction analysis established that the two graphene layers…

材料科学 · 物理学 2013-03-29 Y. Murata , S. Nie , A. Ebnonnasir , E. Starodub , B. B. Kappes , K. F. McCarty , C. V. Ciobanu , S. Kodambaka

A clean, flat and orientation-identified graphene on a substrate is in high demand for graphene electronics. In this study, the hetero-epitaxial graphene growth on Cu(111)/mica(001) by chemical vapor deposition is investigated to check the…

材料科学 · 物理学 2015-10-08 J. L. Qi , K. Nagashio , T. Nishimura , A. Toriumi

We investigate the possibility of non-destructive electron diffraction imaging of a single molecule to determine its structure. The molecular specimen will be held on a free-standing sheet of graphene. Due to the high conductivity of…

化学物理 · 物理学 2009-11-13 E. E. Fill , F. Krausz , M. Raizen

We have used low-energy electron diffraction and microscopy to compare the growth of graphene on hydrogen-free Ge(111) and Ge(110) from an atomic carbon flux. Growth on Ge(110) leads to significantly better rotational alignment of graphene…

材料科学 · 物理学 2015-10-21 P. C. Rogge , M. E. Foster , J. M. Wofford , K. F. McCarty , N. C. Bartelt , O. D. Dubon

Monolayer epitaxial graphene is an appropriate candidate for a wide variety of electronic and optical applications. One advantage of growing graphene on the Si face of SiC is that it develops as a single crystal, as does the layer…