caa a22 4500 445303476 CHVBK 20180317142605.0 cr unu---uuuuu 170323e20100301xx s 000 0 eng 10.1007/s12274-010-1022-4 doi (NATIONALLICENCE)springer-10.1007/s12274-010-1022-4 Band gap of strained graphene nanoribbons [Elektronische Daten] [Yang Lu, Jing Guo] The band structures of strained graphene nanoribbons (GNRs) are examined using a tight-binding Hamiltonian that is directly related to the type and magnitude of strain. Compared to a two-dimensional graphene whose band gap remains close to zero even if a large strain is applied, the band gap of a graphene nanoribbon (GNR) is sensitive to both uniaxial and shear strains. The effect of strain on the electronic structure of a GNR depends strongly on its edge shape and structural indices. For an armchair GNR, a weak uniaxial strain changes the band gap in a linear fashion, whereas a large strain results in periodic oscillation of the band gap. On the other hand, shear strain always tends to reduce the band gap. For a zigzag GNR, the effect of strain is to change the spin polarization at the edges of GNR, and thereby modulate the band gap. A simple analytical model, which agrees with the numerical results, is proposed to interpret the response of the band gap to strain in armchair GNRs. Tsinghua University Press and Springer-Verlag Berlin Heidelberg, 2010 Graphene nanoribbons (GNRs) nationallicence band gap nationallicence strain nationallicence Lu Yang Department of Electrical and Computer Engineering, University of Florida, 32611, Gainesville, FL, USA aut Guo Jing Department of Electrical and Computer Engineering, University of Florida, 32611, Gainesville, FL, USA aut Nano Research Tsinghua Press 3/3(2010-03-01), 189-199 1998-0124 3:3<189 2010 3 12274 https://doi.org/10.1007/s12274-010-1022-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12274-010-1022-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lu Yang Department of Electrical and Computer Engineering, University of Florida, 32611, Gainesville, FL, USA aut NATIONALLICENCE 700 1- Guo Jing Department of Electrical and Computer Engineering, University of Florida, 32611, Gainesville, FL, USA aut NATIONALLICENCE 773 0- Nano Research Tsinghua Press 3/3(2010-03-01), 189-199 1998-0124 3:3<189 2010 3 12274 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer