Results 11 to 20 of about 24,312 (276)

Disorder in twisted bilayer graphene

Physical Review Research, 2020
We develop a theory for a type of disorder in condensed matter systems arising from local twist-angle fluctuations in two strongly coupled van der Waals monolayers twisted with respect to each other to create a flat-band moiré superlattice.
Justin H. Wilson, Yixing Fu, S. Das Sarma, J. H. Pixley   +3 more
doaj   +3 more sources

Tuning superconductivity in twisted bilayer graphene [PDF]

Science, 2018
Upping the pressure in bilayer graphene The discovery of superconductivity and exotic insulating phases in twisted bilayer graphene has established this material as a model system of strongly correlated electrons.
M. Yankowitz, Shaowen Chen, H. Polshyn, Yuxuan Zhang, Kenji Watanabe, T. Taniguchi, D. Graf, A. Young, C. Dean   +8 more
semanticscholar   +5 more sources

An Atomistic Insight into Moiré Reconstruction in Twisted Bilayer Graphene beyond the Magic Angle. [PDF]

ACS Appl Eng Mater, 2023
Twisted bilayer graphene exhibits electronic properties strongly correlated with the size and arrangement of moiré patterns. While rigid rotation of the two graphene layers results in a moiré interference pattern, local rearrangements of atoms due to ...
Dey A, Chowdhury SA, Peña T, Singh S, Wu SM, Askari H.   +5 more
europepmc   +3 more sources

Phonons in Twisted Bilayer Graphene [PDF]

Physical Review B, 2013
We theoretically investigated phonon dispersion in AA-stacked, AB-stacked and twisted bilayer graphene with various rotation angles. The calculations were performed using the Born-von-Karman model for the intra-layer atomic interactions and the Lennard ...
Balandin, Alexander A., Cocemasov, Alexandr I., Nika, Denis L.   +2 more
core   +4 more sources

Infrared single-photon detection with superconducting magic-angle twisted bilayer graphene. [PDF]

Sci Adv
The moiré superconductor magic-angle twisted bilayer graphene (MATBG) shows exceptional properties, with an electron (hole) ensemble of only ~1011 carriers per square centimeter, which is five orders of magnitude lower than traditional superconductors ...
Di Battista G, Fong KC, Díez-Carlón A, Watanabe K, Taniguchi T, Efetov DK.   +5 more
europepmc   +2 more sources

Fractional Chern insulators in magic-angle twisted bilayer graphene. [PDF]

Nature, 2021
Fractional Chern insulators (FCIs) are lattice analogues of fractional quantum Hall states that may provide a new avenue towards manipulating non-Abelian excitations.
Xie Y, Pierce AT, Park JM, Parker DE, Khalaf E, Ledwith P, Cao Y, Lee SH, Chen S, Forrester PR, Watanabe K, Taniguchi T, Vishwanath A, Jarillo-Herrero P, Yacoby A.   +14 more
europepmc   +3 more sources

Bulk valley transport and Berry curvature spreading at the edge of flat bands

Nature Communications, 2020
Spontaneous symmetry breaking of flat bands in twisted graphene systems may lead to anomalous Hall effect with a precursor state which has not been observed. Here, the authors probe this precursor state by observing bulk valley current and large nonlocal
Subhajit Sinha, Pratap Chandra Adak, R. S. Surya Kanthi, Bheema Lingam Chittari, L. D. Varma Sangani, Kenji Watanabe, Takashi Taniguchi, Jeil Jung, Mandar M. Deshmukh   +8 more
doaj   +2 more sources

Realization of topological Mott insulator in a twisted bilayer graphene lattice model [PDF]

Nature Communications, 2021
Magic-angle twisted bilayer graphene exhibits a quantum anomalous Hall effect at 3/4 filling; however, its mechanism is debated. Here, the authors show that such a phase can be realized in a lattice model of twisted bilayer graphene in the strong ...
Bin-Bin Chen, Yuan Da Liao, Ziyu Chen, Oskar Vafek, Jian Kang, Wei Li, Zi Yang Meng   +6 more
doaj   +2 more sources

Evolution of the electronic band structure of twisted bilayer graphene upon doping

Scientific Reports, 2017
The electronic band structure of twisted bilayer graphene develops van Hove singularities whose energy depends on the twist angle between the two layers.
Shengqiang Huang, Matthew Yankowitz, Kanokporn Chattrakun, Arvinder Sandhu, Brian J. LeRoy   +4 more
doaj   +2 more sources

Molecular Pairing in Twisted Bilayer Graphene Superconductivity. [PDF]

Physical Review Letters
We propose a theory for how the weak phonon-mediated interaction (J_{A}=1-4  meV) wins over the prohibitive Coulomb repulsion (U=30-60  meV) and leads to a superconductor in magic-angle twisted bilayer graphene (MATBG). We find the pairing mechanism akin
Yi-Jie Wang, Geng-Dong Zhou, Shiyu Peng, Biao Lian, Zhida Song   +4 more
semanticscholar   +4 more sources