Correlations in Hexagonal Lattice Systems - Application to Carbon Nanotubes

• Authors: K. Czajka , M. Maśka
• Languages of publication: EN

Abstracts

EN

We present exact diagonalization studies of two-dimensional electron gas on hexagonal lattice. Using Lanczös method we analyze the influence of the Coulomb correlations on the density of states and spectral functions. Choosing appropriate boundary conditions we simulate the geometry of a single wall carbon nanotube. In particular, integration over the boundary condition in one direction and summation in the other one allows us to perform cluster calculations for a tube-like system with a finite diameter and infinite length.

Keywords

EN

73.22.-f; 71.15.Dx

Discipline

• 73.22.-f: Electronic structure of nanoscale materials and related systems
• 71.15.Dx: Computational methodology (Brillouin zone sampling, iterative diagonalization, pseudopotential construction)

• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 5
• Pages: 703-707

Dates

published

2004-11

received

2004-06-06

Contributors

author

K. Czajka

• Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

M. Maśka

• Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

References

• 1. see e.g., J.K. Cullum, R.A. Willonghby, Lanczos Algorithms for Large Symmetric Eigenvalue Computation, Birkhauser, Boston 1985
• 2. D. Poiblanc, Phys. Rev. B, 44, 9562, 1991; C. Gross, Z. Phys. B, 86, 359, 1992; Phys. Rev. B, 53, 6865, 1996

Identifiers

DOI

10.12693/APhysPolA.106.703