▎ 摘　　要

The role of edge states in the electronic specific heat and magnetic ordering of graphene strip is investigated by diagonalizing a lattice Hamiltonian for graphene strips. The magnetization of the edge sites is evaluated by employing the on-site Coulomb repulsion U within a mean-field approximation. We find that edge states give extra strong enhancement in the specific heat of zigzag strips at very low temperatures in addition to the Cel similar or equal to y T-alpha behavior of two-dimensional (2D) massless fermions in graphene with y approximate to 7.18 k(B) and alpha approximate to 2.27 at low temperatures. The onset value U-c for ferrimagnetic ordering in zigzag strips depends notably on the next nearest neighbour (NNN) hopping strength t(2) but not much on the Rashba spin-orbit coupling V-R for a given t(2). (c) 2007 Elsevier B.V. All rights reserved.