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cond-mat.mes-hall2009★ 30 cited
Dirac Fermions in Graphene Nanodisk and Graphene Corner: Texture of Vortices with Unusual Winding Number
Motohiko Ezawa
We analyze the zero-energy sector of the trigonal zigzag nanodisk and corner based on the Dirac theory of graphene. The zero-energy states are shown to be indexed by the edge momen…
cond-mat.mes-hall2009★ 21 cited
Quasi-Ferromagnet Spintronics in Graphene Nanodisk-Lead System
Motohiko Ezawa
A zigzag graphene nanodisk can be interpreted as a quantum dot with an internal degree of freedom. It is well described by the infinite-range Heisenberg model. We have investigated…
cond-mat.mes-hall2009★ 18 cited
Quasi-Phase Transition and Many-Spin Kondo Effects in Graphene Nanodisk
Motohiko Ezawa
The trigonal zigzag nanodisk with size has localized spins. We investigate its thermodynamical properties with and without external leads. Leads are made of zigzag graphene…