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Spectral functions for doped carbon nanotubes using the Gross-Neveu model

Title
Spectral functions for doped carbon nanotubes using the Gross-Neveu model
Authors
Ahn, CPaik, E
Ewha Authors
안창림
SCOPUS Author ID
안창림scopus
Issue Date
2001
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
0374-4884JCR Link
Citation
vol. 39, no. 6, pp. L965 - L970
Publisher
KOREAN PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
We use integrable and conformal quantum field theories to compute the single-particle spectral function of armchair-type carbon nanotubes away from half-filling. The gapless charge sector is described by the Luttinger model and is solved by using conformal field theory. The other sectors are known to possess SO(6) symmetry at low temperature and are described by the SO(6) Gross-Neveu model, The correlation function of this massive sector is computed using exact form factors, Due to intermediate particle states, the spectral function is exactly determined by the given form factors between certain threshold energies. We derive. an exact expression explicitly for certain values of the Luttinger parameters at low frequency to illustrate the power of this approach.
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자연과학대학 > 물리학전공 > Journal papers
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