Deformation effect on electronic and optical properties of nanographite ribbons

The electronic structures of deformed nanographite ribbons are calculated from the Huckel tight-binding model. They strongly depend on the uniaxial strain and the ribbon geometry (edge structure and width). The uniaxial strain significantly affects the subband spacings and the energy dispersions. A monotonous relation between the uniaxial strain and the state energies is absent. For armchair ribbons, the uniaxial strain drastically changes the energy gap and thus leads to the semiconductor-metal transition. The dependence of energy gap on strain is determined by the ribbon width. The large strain could also induce the subband crossing. On the other hand, zigzag ribbons remain metallic during the variation of the strain. Armchair and zigzag ribbons, respectively, behave as zigzag and armchair nanotubes. The calculated absorption spectrum exhibits rich peak structures, mainly owing to the divergent density of states of the one-dimensional subbands. The uniaxial-strain effects on optical excitations are stro...

[1]  Motohiko Ezawa,et al.  Peculiar width dependence of the electronic properties of carbon nanoribbons , 2006, cond-mat/0602480.

[2]  K. Nakada,et al.  Lattice Distortion in Nanographite Ribbons , 1997 .

[3]  Yang,et al.  Electronic structure of deformed carbon nanotubes , 2000, Physical review letters.

[4]  K. Harigaya.  Mechanism of magnetism in stacked nanographite: Theoretical study , 2000, cond-mat/0010043.

[5]  S. Iijima,et al.  Morphology and structure of a one‐dimensional graphite polymer, poly‐peri‐naphthalene , 1986 .

[6]  Manfred Sigrist,et al.  Spin Wave Mode of Edge-Localized Magnetic States in Nanographite Zigzag Ribbons , 1998 .

[7]  Ming-Fa Lin,et al.  Electronic and optical properties of a nanographite ribbon in an electric field , 2006 .

[8]  Feng-Lin Shyu,et al.  Optical Properties of Nanographite Ribbons , 2000 .

[9]  A. M. Rao,et al.  Heat-treatment effect on the nanosized graphite π-electron system during diamond to graphite conversion , 2000 .

[10]  Lin,et al.  Plasmons and optical properties of carbon nanotubes. , 1994, Physical review. B, Condensed matter.

[11]  Riichiro Saito,et al.  Inhomogeneous optical absorption around the K point in graphite and carbon nanotubes , 2003 .

[12]  A. Charlier,et al.  Uniaxial-stress effects on the electronic properties of carbon nanotubes , 1997 .

[13]  G. Furdin,et al.  Band structure model and dynamical dielectric function in lowest stages of graphite acceptor compounds , 1980 .

[14]  Walter A. Harrison,et al.  Electronic structure and the properties of solids , 1980 .

[15]  K. Yoshino,et al.  Electronic energy state of a periodic porous nanoscale graphite , 2000 .

[16]  Yoshinori Koga,et al.  Graphitic ribbons without hydrogen-termination: Electronic structures and stabilities , 2000 .

[17]  P. Eklund,et al.  Thermal conversion of bundled carbon nanotubes into graphitic ribbons. , 2005, Nano letters.

[18]  M. Sigrist,et al.  Electronic and magnetic properties of nanographite ribbons , 1998, cond-mat/9809260.

[19]  Yoshiyuki Miyamoto,et al.  First-principles study of edge states of H-terminated graphitic ribbons , 1999 .

[20]  Zero-conductance resonances due to flux states in nanographite ribbon junctions , 1999, Physical review letters.

[21]  K. Kusakabe,et al.  Peculiar Localized State at Zigzag Graphite Edge , 1996 .

[22]  G. Dresselhaus,et al.  Optical Properies of Graphite , 1973 .

[23]  Ming-Fa Lin,et al.  Tight-Binding Band Structures of Nanographite Multiribbons , 2001 .

[24]  Ming-Fa Lin,et al.  Optical spectra of single-wall carbon nanotube bundles , 2000 .

[25]  Fujita,et al.  Edge state in graphene ribbons: Nanometer size effect and edge shape dependence. , 1996, Physical review. B, Condensed matter.

[26]  M. P. Anantram,et al.  Band-gap change of carbon nanotubes: Effect of small uniaxial and torsional strain , 1999 .

[27]  G. Mahan.  Many-particle physics , 1981 .

[28]  M. Yudasaka,et al.  Polyperinaphthalene film formation by pulsed laser deposition with a target of perylenetetracarboxylic dianhydride , 1994 .

[29]  P. Wallace.  The Band Theory of Graphite , 1947 .

[30]  T. Yamabe,et al.  Electronic structures and transport properties of carbon nanotube , 2001 .

[31]  K. Yoshizawa,et al.  Bandgap Oscillation in Polyphenanthrenes , 1998 .

[32]  B. T. Kelly,et al.  Physics of Graphite , 1981 .

[33]  F. Shyu,et al.  Electronic collective excitations in AB-stacked nanographite ribbons , 2001 .