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In this paper a systematic examination of graphene/hexagonal boron nitride (g/hBN) bilayers is presented, through a recently developed two-dimensional phase field crystal model that incorporates out-of-plane deformations. The system…

Materials Science · Physics 2023-02-09 K. R. Elder , Zhi-Feng Huang , T. Ala-Nissila

Two-dimensional (2d) nano-electronics, plasmonics, and emergent phases require clean and local charge control, calling for layered, crystalline acceptors or donors. Our Raman, photovoltage, and electrical conductance measurements combined…

Processing methods are described for the development of magnesium diboride wire using the chemical vapor deposition (CVD) to produce long lengths of suitably doped starting boron fiber. It is found that titanium can be co-deposited with the…

We report on a strongly coupled bilayer graphene (BLG) - \bise\ device with a junction resistance of less than 1.5 k$\Omega\mu$m$^2$. This device exhibits unique behavior at the interface, which cannot be attributed to either material in…

Mesoscale and Nanoscale Physics · Physics 2018-03-23 Ayelet Zalic , Tom Dvir , Hadar Steinberg

Graphene grown by chemical vapor deposition (CVD) is the most promising material for industrial-scale applications based on graphene monolayers. It also holds promise for spintronics; despite being polycrystalline, spin transport in CVD…

Mesoscale and Nanoscale Physics · Physics 2019-10-10 Aron W. Cummings , Simon M. -M. Dubois , Jean-Christophe Charlier , Stephan Roche

Hexagonal boron nitride (BN), one of the very few layered insulators, plays a crucial role in 2D materials research. In particular, BN grown with a high pressure technique has proven to be an excellent substrate material for graphene and…

Mesoscale and Nanoscale Physics · Physics 2020-06-19 J. Sonntag , J. Li , A. Plaud , A. Loiseau , J. Barjon , J. H. Edgar , C. Stampfer

We report on low-temperature transport study of a single layer graphene (SLG)-twisted bilayer graphene (tBLG) junction device. The SLG-tBLG junction in the device is grown by chemical vapor deposition and the device is fabricated in a…

Mesoscale and Nanoscale Physics · Physics 2020-04-17 Dingran Rui , Luzhao Sun , N. Kang , Jiayu Li , Li Lin , Hailin Peng , Zhongfan Liu , H. Q. Xu

Bilayer graphene (BLG) has recently attracted a great deal of attention because of its electrically tunable energy gaps and its unusual electronic structure. In this Letter we present analytical and semi-analytical expressions, based on the…

Strongly Correlated Electrons · Physics 2009-12-03 Giovanni Borghi , Marco Polini , Reza Asgari , A. H. MacDonald

Bilayer graphene field-effect transistors (BLG-FETs), unlike conventional semiconductors, are greatly sensitive to potential fluctuations due to the charged impurities in high-k gate stacks since the potential difference between two layers…

Applied Physics · Physics 2018-09-18 Teerayut Uwanno , Takashi Taniguchi , Kenji Watanabe , Kosuke Nagashio

We use density functional theory and the van der Waals density functional (vdW-DF) method to determine the binding separation in bilayer and bulk graphane and study the changes in electronic band structure that arise with the multilayer…

Materials Science · Physics 2015-05-20 Jochen Rohrer , Per Hyldgaard

Vertical integration of two-dimensional materials has recently emerged as an exciting method for the design of novel electronic and optoelectronic devices. Using density functional theory, we investigatethe structural and electronic…

Materials Science · Physics 2015-06-25 Yongqing Cai , Gang Zhang , Yong-Wei Zhang

Stacking order has strong influence on the coupling between the two layers of twisted bilayer graphene (BLG), which in turn determines its physical properties. Here, we report the investigation of the interlayer coupling of the epitaxially…

Mesoscale and Nanoscale Physics · Physics 2020-01-28 Bing Deng , Binbin Wang , Ning Li , Rongtan Li , Yani Wang , Jilin Tang , Qiang Fu , Zhen Tian , Peng Gao , Jiamin Xue , Hailin Peng

We report on realization and quantum transport study of a twisted bilayer graphene (tBLG) Josephson junction device. High-quality tBLG employed in the device fabrication is obtained via chemical vapour deposition and the device is…

Mesoscale and Nanoscale Physics · Physics 2020-03-06 Dingran Rui , Luzhao Sun , N. Kang , Hailin Peng , Zhongfan Liu , H. Q. Xu

We show the emergence of fractional quantum Hall states in dry-transferred chemical vapor deposition (CVD) derived graphene assembled into heterostructures for magnetic fields from below 3 T to 35 T. Effective composite-fermion filling…

Mesoscale and Nanoscale Physics · Physics 2020-09-14 M. Schmitz , T. Ouaj , Z. Winter , K. Rubi , K. Watanabe , T. Taniguchi , U. Zeitler , B. Beschoten , C. Stampfer

We investigate key electrical properties of monolayer graphene assembled by chemical-vapor-deposition (CVD) as impacted by supporting substrate material. Graphene field-effect transistors (GFETs) were fabricated with carbon channel placing…

Materials Science · Physics 2015-05-28 Edwin Kim , Tianhua Yu , Eui Sang Song , Bin Yu

The emergence of controlled, two-dimensional moir\'e materials has uncovered a new platform for investigating topological physics. Twisted double bilayer graphene (TDBG) has been predicted to host a topologically non-trivial gapped phase…

One popular approach to prepare graphene is to grow them on transition metal substrates via chemical vapor deposition. By using the density functional theory with dispersion correction, we systematically investigate for the first time the…

Materials Science · Physics 2015-06-03 Jiaxin Zheng , Yangyang Wang , Lu Wang , Ruge Quhe , Zeyuan Ni , Wai-Ning Mei , Zhengxiang Gao , Dapeng Yu , Junjie Shi , Jing Lu

Quantum coherent effects can be probed in multilayer graphene through electronic transport measurements at low temperatures. In particular, bilayer graphene is known to be susceptible to quantum interference corrections of the conductivity,…

The AB-stacked bilayer graphene (BLG) is a pure semiconductor whose band gap and properties can be tuned by various methods such as doping or applying gate voltage. Here we show an alternative method to control the electronic properties of…

Materials Science · Physics 2017-02-06 Srimanta Pakhira , Kevin P. Lucht , Jose L. Mendoza-Cortes

In this work we present a simple pathway to obtain large single-crystal graphene on copper (Cu) foils with high growth rates using a commercially available cold-wall chemical vapour deposition (CVD) reactor. We show that graphene nucleation…

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