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85037913397
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The SIESTA program is described in Ref. 16. It builds the DFT self-consistent Hamiltonian in order-(Formula presented) operations. The Hamiltonian problem can be solved either with diagonalization (order-(Formula presented) or with order-(Formula presented) algorithms according to convenience. In this study both options were used.
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The SIESTA program is described in Ref. 16. It builds the DFT self-consistent Hamiltonian in order-(Formula presented) operations. The Hamiltonian problem can be solved either with diagonalization (order-(Formula presented) or with order-(Formula presented) algorithms according to convenience. In this study both options were used.
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16
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0006838610
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Artacho, E.3
Soler, J.M.4
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22
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85037876823
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The range of the orbitals is defined in a balanced way by a common orbital-confinement energy of 0.14 eV (Ref. 24). The resulting radii are 4.52 and 5.52 for the s and p orbitals of C, respectively, 5.20 for the s orbital of H, and 3.56 and 4.35 for s and p orbitals of O, all of them in atomic units.
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The range of the orbitals is defined in a balanced way by a common orbital-confinement energy of 0.14 eV (Ref. 24). The resulting radii are 4.52 and 5.52 for the s and p orbitals of C, respectively, 5.20 for the s orbital of H, and 3.56 and 4.35 for s and p orbitals of O, all of them in atomic units.
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23
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85037902123
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The split-off function reproduces the tail of the original orbital beyond some radius, matching to a smooth (Formula presented) towards the nucleus. The matching radius is chosen so that the split orbital carries 15% of the norm of the original one (Ref. 24
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The split-off function reproduces the tail of the original orbital beyond some radius, matching to a smooth (Formula presented) towards the nucleus. The matching radius is chosen so that the split orbital carries 15% of the norm of the original one (Ref. 24).
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25
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0039842291
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H. S. Chen, A. R. Kortan, R. C. Haddon, M. L. Kaplan, C. H. Chen, M. Mujsce, H. Chou, and D. A. Fleming, Appl. Phys. Lett. 59, 2956 (1991).
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Chen, C.H.5
Mujsce, M.6
Chou, H.7
Fleming, D.A.8
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26
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85037909894
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Note that the numbers in Fig. 22(a) depend on the proposed oxidation process, and that other possibilities, like involving C and O interstitials are plausible, and would affect the results. The origin of the ambiguity is the presence of three references (bulk C, (Formula presented), and (Formula presented) for defining the chemical potential of just two species, C and O. The process proposed involves no extra C atoms. However, the energy differences shown in Fig. 22(b) are independent of these assumptions. There is no ambiguity in the case of the closing process, since, in the absence of (Formula presented), both chemical potentials are well defined.
-
Note that the numbers in Fig. 22(a) depend on the proposed oxidation process, and that other possibilities, like involving C and O interstitials are plausible, and would affect the results. The origin of the ambiguity is the presence of three references (bulk C, (Formula presented), and (Formula presented) for defining the chemical potential of just two species, C and O. The process proposed involves no extra C atoms. However, the energy differences shown in Fig. 22(b) are independent of these assumptions. There is no ambiguity in the case of the closing process, since, in the absence of (Formula presented), both chemical potentials are well defined.
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27
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85037884572
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At growth temperatures (Formula presented) K), molecular dynamics simulations have shown that narrow SWNT’s close spontaneously (Ref. 12
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At growth temperatures (Formula presented) K), molecular dynamics simulations have shown that narrow SWNT’s close spontaneously (Ref. 12).
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28
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11244335399
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S. Bandow, S. Asaka, Y. Saito, A. M. Rao, L. Gregorian, E. Richter, and P. C. Eklund, Phys. Rev. Lett. 80, 3779 (1998).
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Bandow, S.1
Asaka, S.2
Saito, Y.3
Rao, A.M.4
Gregorian, L.5
Richter, E.6
Eklund, P.C.7
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