Shirakawa, T.; Nishimoto, S.; Ohta, Y.; Fukuyama, H.: Disorder and superconductivity in doped semiconductor nanotubes. In: Journal of Physics: Conference Series 150 (2009), Nr. 5, 52238. DOI:
https://doi.org/10.1088/1742-6596/150/5/052238
Zusammenfassung: |
Finite-size systems of the one-dimensional attractive Hubbard model with random potential are studied as an effective model for doped semiconductor nanotubes. We calculate the binding energy of Cooper pairs and pair correlation function by the density-matrix renormalization group method. We show that, when the scattering potential is strong, there appears the ground state where Cooper pairs are formed but are localized spatially, with a decay length of pair correlation smaller than the system size. Experimental relevance is discussed. © 2009 IOP Publishing Ltd.
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Lizenzbestimmungen: |
CC BY 3.0 Unported - https://creativecommons.org/licenses/by/3.0/
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2009 |
Schlagwörter (englisch): |
Cooper pair, Decay length, Density matrix renormalization group, Finite-size systems, Pair correlation functions, Pair correlations, Random potentials, Scattering potentials, System size, Binding energy, Hubbard model, Semiconductor doping, Statistical mechanics, Nanotubes
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Fachliche Zuordnung (DDC): |
530 | Physik
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Kontrollierte Schlagwörter: |
Konferenzschrift
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