Open AccessThe investigation of roughing effect sensitive to size in graphene quantum dot device
Author(s) -
Guiqin Li,
Jun Cai
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6453
Subject(s) - graphene , zigzag , quantum dot , materials science , enhanced data rates for gsm evolution , graphene quantum dot , electrode , condensed matter physics , quantum , nanotechnology , physics , geometry , quantum mechanics , computer science , telecommunications , mathematics
The transport property of graphene quantum dot devices of different length is investigated by first-principles calculation. The changes of transport property caused by roughing effect are sensitive to size of graphene. The results demonstrate that whether the electrode is connected with zigzag edge or armchair edge of grapheneboth the transmission coefficient and current always change. But the changes have reversed effect for the two different connections when the length is increased.