VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013

 QNplage

 Nanophysics: from fundamentals to applications

(the return)

 

Monday 5
Graphene

› 12:00 - 12:30 (30min)
Novel electronic and structural properties of graphene
Francisco Guinea  1@  
1 : Instituto de Ciencia de Materiales de Madrid  (CSIC)  -  Website
Sor Juana Inés de la Cruz 3. 28049 Madrid -  Spain

i) Graphene is a semimetal which shows a finite conductivity even in the absence of carriers. Transport in very clean, ballistic graphene, is due to evanescent waves, the so called "pseudiffusive regime". We discuss how electron-electron interactions modify this regime, and lead to a variety of temperature and magnetic field dependences.

ii) The graphene lattice is extremely stiff, having one of the largest Young modulus of all materials. Suspended samples behave as membranes, and anharmonic effects lead to the renormalization of the elastic properties. We show experimental and theoretical results which suggest that the stiffness of suspended graphene depends on geometry and sample dimensions, and its value can exceed the present accepted value, or tend to zero.


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