Raman spectra of out-of-plane phonons in bilayer graphene
نویسندگان
چکیده
Kentaro Sato,1 Jin Sung Park,2 Riichiro Saito,1 Chunxiao Cong,3 Ting Yu,3,4 Chun Hung Lui,5 Tony F. Heinz,5 Gene Dresselhaus,6 and Mildred S. Dresselhaus7,8 1Department of Physics, Tohoku University, Sendai 980-8578, Japan 2Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan 3Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore 4Department of Physics, Faculty of Science, National University of Singapore, 117542, Singapore 5Department of Physics and Electrical Engineering, Columbia University, 538 West 120th Street, New York, NY 10027, USA 6Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA 7Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4037, USA 8Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA (Received 30 March 2011; published 25 July 2011)
منابع مشابه
Engineering of the thermodynamic properties of bilayer graphene by atomic plane rotations: the role of the out-of-plane phonons.
We investigated theoretically the specific heat of graphene, bilayer graphene and twisted bilayer graphene taking into account the exact phonon dispersion and density of states for each polarization branch. It is shown that contrary to a conventional belief the dispersion of the out-of-plane acoustic phonons - referred to as ZA phonons - deviates strongly from a parabolic law starting from the ...
متن کاملGraphene V: Recent advances in studies of graphene and graphene analogues
We are delighted to presenta collection of 17 research/review articles on grapheme and grapheme analogs covering manydifferent aspects. This special issue ist he fifth in series on graphene, reflecting the continued excitement in grapheme science and more recently, in other 2D materials like MoS2 and BN. Ever since the discovery of graphene, Raman spectroscopy has played a crucial role in non-d...
متن کاملEffects of layer stacking on the combination Raman modes in graphene.
We have observed new combination modes in the range from 1650 to 2300 cm(-1) in single-(SLG), bi-, few-layer and incommensurate bilayer graphene (IBLG) on silicon dioxide substrates. A peak at ∼1860 cm(-1) (iTALO-) is observed due to a combination of the in-plane transverse acoustic (iTA) and the longitudinal optical (LO) phonons. The intensity of this peak decreases with increasing number of l...
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 کامل