Electronic spectrum of twisted bilayer graphene
نویسندگان
چکیده
منابع مشابه
Superlensing with twisted bilayer graphene
The charge susceptibility of twisted bilayer graphene is investigated in the Dirac cone, respectively, randomphase approximation. For small enough twist angles θ ≲ 2° , we find genuine interband plasmons, i.e., collective excitonic modes that exist in the undoped material with an almost constant energy dispersion. In this regime, the loss function can be described as a Fano resonance, and we ar...
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Alexandr I. Cocemasov,1 Denis L. Nika,1,2,* and Alexander A. Balandin2,3,† 1E. Pokatilov Laboratory of Physics and Engineering of Nanomaterials, Department of Theoretical Physics, Moldova State University, Chisinau, MD-2009, Republic of Moldova 2Nano-Device Laboratory, Department of Electrical Engineering, Bourns College of Engineering, University of California–Riverside, Riverside, California ...
متن کاملThermal conductivity of twisted bilayer graphene.
We have investigated experimentally the thermal conductivity of suspended twisted bilayer graphene. The measurements were performed using an optothermal Raman technique. It was found that the thermal conductivity of twisted bilayer graphene is lower than that of monolayer graphene and the reference, Bernal stacked bilayer graphene in the entire temperature range examined (∼300-700 K). This find...
متن کاملTerahertz conductivity of twisted bilayer graphene.
Using terahertz time-domain spectroscopy, the real part of optical conductivity [σ(1)(ω)] of twisted bilayer graphene was obtained at different temperatures (10-300 K) in the frequency range 0.3-3 THz. On top of a Drude-like response, we see a strong peak in σ(1)(ω) at ~2.7 THz. We analyze the overall Drude-like response using a disorder-dependent (unitary scattering) model, then attribute the ...
متن کاملQuantum Hall effect in twisted bilayer graphene.
We address the quantum Hall behavior in twisted bilayer graphene transferred from the C face of SiC. The measured Hall conductivity exhibits the same plateau values as for a commensurate Bernal bilayer. This implies that the eightfold degeneracy of the zero energy mode is topologically protected despite rotational disorder as recently predicted. In addition, an anomaly appears. The densities at...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2015
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.92.075402