Výsledky vyhledávání - "John Wallbank"

High-order minibands and interband Landau level reconstruction in graphene moire superlattice

Autor: Dongxia Shi, Shuopei Wang, Dmitri K. Efetov, Jing Zhang, Cheng Shen, Jian Tang, Vladimir I. Fal'ko, Guangyu Zhang, Takashi Taniguchi, Peng Chen, Xiaobo Lu, Kenji Watanabe, Rong Yang, Wei Yang, John Wallbank, Shuang Wu

Publikováno v: Lu, X, Tang, J, Wallbank, J R, Wang, S, Shen, C, Wu, S, Chen, P, Yang, W, Zhang, J, Watanabe, K, Taniguchi, T, Yang, R, Shi, D, Efetov, D K, Fal'ko, V I & Zhang, G 2020, ' High-order minibands and interband Landau level reconstruction in graphene moiré superlattices ', Physical Review B, vol. 102, no. 4 . https://doi.org/10.1103/PhysRevB.102.045409

The propagation of Dirac fermions in graphene through a long-period periodic potential would result in a band folding together with the emergence of a series of cloned Dirac points (DPs) [C.-H. Park et al., Nat. Phys. 4, 213 (2008); C.-H. Park et al.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60801febc70e708809e8301786cdd2a6

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Excess resistivity in graphene superlattices caused by umklapp electron-electron scattering

Autor: R. Krishna Kumar, Kostya S. Novoselov, Gregory Auton, Kenji Watanabe, John Wallbank, Artem Mishchenko, Leonid Ponomarenko, Andre K. Geim, Matthew Holwill, Vladimir I. Fal'ko, John Birkbeck, Takashi Taniguchi, Zihao Wang, Igor L. Aleiner

Publikováno v: Wallbank, J, Krishna Kumar, R, Holwill, M, Wang, Z, Auton, G, Birkbeck, J, Mishchenko, A, Ponomarenko, L A, Watanabe, K, Taniguchi, T, Novoselov, K, Aleiner, I L, Geim, A & Fal'ko, V 2018, ' Excess resistivity in graphene superlattices caused by umklapp electron-electron scattering ', Nature Physics, vol. 15, no. 1, pp. 32-36 . https://doi.org/10.1038/s41567-018-0278-6
Nature Physics

In electronic transport, umklapp processes play a fundamental role as the only intrinsic mechanism that allows electrons to transfer momentum to the crystal lattice and, therefore, provide a finite electrical resistance in pure metals1,2. However, um

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66df2ab4af62059004afc98a3d5a2035
https://www.research.manchester.ac.uk/portal/en/publications/excess-resistivity-in-graphene-superlattices-caused-by-umklapp-electronelectron-scattering(a60300b8-2263-4de8-9782-ea12a1f273e8).html

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Density-Functional and Tight-Binding Theory of Silicene and Silicane

Autor: Viktor Zólyomi, Neil Drummond, John Wallbank, Vladimir I. Fal'ko

Publikováno v: Silicene ISBN: 9783319999623

A combination of density functional theory and a tight-binding model offers a robust means to describe the structure, vibrations, and electronic states of silicene. In this chapter we give an overview of the electronic structure and phonon dispersion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04466fd508e1acf144370c69329176e0
https://doi.org/10.1007/978-3-319-99964-7_2

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Ballistic electron channels including weakly protected topological states in delaminated bilayer graphene

Autor: Lucian Covaci, John Wallbank, Vladimir I. Fal'ko, François M. Peeters, Misa Andelkovic, Thomas Lane

Publikováno v: Lane, T, Andelkovic, M, Wallbank, J, Covaci, L, Peeters, F M & Fal'ko, V 2018, ' Ballistic electron channels including weakly protected topological states in delaminated bilayer graphene. ', Physical Review B, vol. 97, 045301 . https://doi.org/10.1103/PhysRevB.97.045301
Physical review B

We show that delaminations in bilayer graphene (BLG) with electrostatically induced interlayer asymmetry can provide one with ballistic channels for electrons with energies inside the electrostatically induced BLG gap. These channels are formed by a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fe6fff35fa5b8719404a234068ea6ee
https://doi.org/10.1103/PhysRevB.97.045301

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Moiré superlattice effects in graphene/boron-nitride van der Waals heterostructures

Autor: Marcin Mucha-Kruczynski, John Wallbank, Vladimir I. Fal'ko, Xi Chen

Publikováno v: Annalen der Physik. 527:359-376

Van der Waals heterostructures of graphene and hexagonal boron nitride feature a moire superlattice for graphene's Dirac electrons. Here, we review the effects generated by this superlattice, including a specific miniband structure featuring gaps and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::afff7f9e0fae8625652f202844a42f65
https://doi.org/10.1002/andp.201400204

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Gate induced monolayer behavior in twisted bilayer black phosphorus

Autor: Oguz Gulseren, Cem Sevik, John Wallbank, François M. Peeters, Deniz Çakır

Publikováno v: Sevik, C, Wallbank, J, Gülseren, O, Peeters, F M & Çakır, D 2017, ' Gate induced monolayer behavior in twisted bilayer black phosphorus ', 2 D Materials, vol. 4, no. 3 . https://doi.org/10.1088/2053-1583/aa80c4
2D materials
2D Materials

WOS: 000406926600001
Optical and electronic properties of black phosphorus strongly depend on the number of layers and type of stacking. Using first-principles calculations within the framework of density functional theory, we investigate the el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c10fe1c216b07ed6c9d2027fb24f55d8
https://doi.org/10.1088/2053-1583/aa80c4

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Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN

Autor: Xi Chen, John Wallbank, Edward McCann, Vladimir I. Fal'ko, Marcin Mucha-Kruczynski

Publikováno v: Chen, X, Wallbank, J, Mucha-Kruczynski, M, McCann, E & Falko, V 2016, ' Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN ', Physical Review B: covering condensed matter and materials physics, vol. 94, no. 4, 045442 . https://doi.org/10.1103/PhysRevB.94.045442
Chen, X, Wallbank, J R, Mucha-Kruczynski, M, Mccann, E & Fal'ko, V I 2016, ' Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN ', Physical Review B, vol. 94, no. 4 . https://doi.org/10.1103/PhysRevB.94.045442

We investigate the magnetic minibands of a heterostructure consisting of bilayer graphene (BLG) and hexagonal boron nitride (hBN) by numerically diagonalizing a two-band Hamiltonian that describes electrons in BLG in the presence of a moire potential

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c219ecf0146edeed352d9b88d975501b
https://doi.org/10.1103/PhysRevB.94.045442

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