منابع مشابه
Electronic compressibility of gapped bilayer graphene
A. F. Young, C. R. Dean, 3 I. Meric, S. Sorgenfrei, H. Ren, K. Watanabe, T. Taniguchi, J. Hone, K. L. Shepard, and P. Kim Department of Physics, Columbia University, New York, New York 10027, USA Department of Electrical Engineering, Columbia University, New York, New York 10027, USA Department of Mechanical Engineering, Columbia University, New York, New York 10027, USA Advanced Materials Labo...
متن کاملElectronic compressibility of a graphene bilayer.
We calculate the electronic compressibility arising from electron-electron interactions for a graphene bilayer within the Hartree-Fock approximation. We show that, due to the chiral nature of the particles in this system, the compressibility is rather different from those of either the two-dimensional electron gas or ordinary semiconductors. We find that an inherent competition between the cont...
متن کاملElectronic compressibility of layer-polarized bilayer graphene
A. F. Young,1 C. R. Dean,2,3 I. Meric,2 S. Sorgenfrei,2 H. Ren,1 K. Watanabe,4 T. Taniguchi,4 J. Hone,3 K. L. Shepard,2 and P. Kim1 1Department of Physics, Columbia University, New York, New York 10027, USA 2Department of Electrical Engineering, Columbia University, New York, New York 10027, USA 3Department of Mechanical Engineering, Columbia University, New York, New York 10027, USA 4Advanced ...
متن کاملLocal compressibility measurements of correlated states in suspended bilayer graphene.
Bilayer graphene has attracted considerable interest due to the important role played by many-body effects, particularly at low energies. Here we report local compressibility measurements of a suspended graphene bilayer. We find that the energy gaps at filling factors ν= ± 4 do not vanish at low fields, but instead merge into an incompressible region near the charge neutrality point at zero ele...
متن کاملDensity Dependent Exchange Contribution to @ =@n and Compressibility in Graphene
We calculate @ =@n (where chemical potential and n electron density), which is associated with the compressibility, in graphene as a function of n, within the Hartree-Fock approximation. The exchange-driven Dirac-point logarithmic singularity in the quasiparticle velocity of intrinsic graphene disappears in the extrinsic case. The calculated renormalized @ =@n in extrinsic graphene on SiO2 has ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2011
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.83.085429