EPR spectroscopy of low-dimension structures produced in natural diamonds and synthetic diamond films by ion implantation (review)

Ertchak, D. P.; Efimov, V. G.; Stelmakh, V. F.

doi:10.1007/bf02683886

Cited by 22 publications

(77 citation statements)

References 42 publications

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“…Analogous conclusion was recently done in [9] by electron spin resonance studies (ESR) of ultra-small NTs. The observed ESR spectra were qualitatively the similar to those ones observed in CZSNTs produced by HEIM of diamond single crystals [4][5][6] and they were entirely different in comparison with the earlier measured ESR spectra of SWNTs of larger diameter, that is 2D-dimensional SWNTs [10]. The work [9] builds in fact a bridge between the incorporated in diamond matrix NTs and free standing NTs, obtained by CVD-methods, indicating additionally to the works [4][5][6] on identical structure of CZSNTs.…”

mentioning

confidence: 41%

“…The observed ESR spectra were qualitatively the similar to those ones observed in CZSNTs produced by HEIM of diamond single crystals [4][5][6] and they were entirely different in comparison with the earlier measured ESR spectra of SWNTs of larger diameter, that is 2D-dimensional SWNTs [10]. The work [9] builds in fact a bridge between the incorporated in diamond matrix NTs and free standing NTs, obtained by CVD-methods, indicating additionally to the works [4][5][6] on identical structure of CZSNTs. Some (not of principle) differences in ESR data in [4][5][6] and in [9] can be attributed mainly to presence along with CZSNTs the tubes with else two different chiralities in experiment of [9].…”

mentioning

confidence: 41%

“…It means, that for 2D-SWNTs all degrees of freedom, which are relevant to the bonds in rolled graphene sheet will be essential by interaction with external EM-field and the simplification used in 1D-SSH model becomes to be incorrect for 2D-SWNTs in full accordance with existing 2D-SWNTs theory and Raman scattering experiments, see for instance [1,17,19,18]. Experimental confirmation for applicability of Slater principle to quasi-1D-CZSNTs and for the model of quasi-1D-CZSNTs above proposed follows from ESR-studies in rather perfect quasi-1D-CZSNTs, produced by high energy ion modification of diamond single crystals, by which the appearance of Peierls transition and neutral paramagnetic (with spin S = 1/2) SSH-p-soliton formation were established [5]. Therefore, perfect quasi-1D CZSNTs, characterized by (m, 0) indices, will have bandgap like to classical semiconductors at any m, including the case m ¼ 3q; q 2 N, for which the 2D-theory, existing at present, predicts the metallic properties.…”

mentioning

confidence: 73%

“…The work [9] builds in fact a bridge between the incorporated in diamond matrix NTs and free standing NTs, obtained by CVD-methods, indicating additionally to the works [4-6] on identical structure of CZSNTs. Some (not of principle) differences in ESR data in [4][5][6] and in [9] can be attributed mainly to presence along with CZSNTs the tubes with else two different chiralities in experiment of [9]. Therefore the above analyzed experimental results mean, that theoretical 2D-SWNT-model, see for instance [1], is unapplicable for quasi-1D NTs.…”

mentioning

confidence: 90%

“…The necessity in the given model is determined by analysis of experimental results, indicating, that with decrease of tube diameter the 2D-1D transition takes place and all physical properties of carbon NTs undergo qualitative leap. It is relevant to both the kinds of NTs, that is to rather perfect NTs produced by high energy ðP 1 Mev per nucleonÞ ion modification (HEIM) of diamond single crystals [4][5][6] and the so-called ultra-small NTs with 0.4 nm diameter, produced [7,8] inside the nanochannels of porous zeolite AlPO4-5 single crystals. It is interesting, that the authors of [7,8] are considering 0.4 nm diameter single wall nanotubes (SWNTs) to be ideal one-dimensional quantum hollow wires, that is in fact they come to the same conclusion concerning the 2D-1D transition presence.…”

mentioning

confidence: 99%

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QED model of resonance phenomena in quasionedimensional multichain qubit systems

Dovlatova

Yearchuck²

2011

Chemical Physics Letters

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a b s t r a c tThe analytical solution of the task of the interaction of quantized EM-field with axially symmetric quasi-1D multichain qubit system by taking into account both the intrachain and interchain qubit coupling has been obtained for the first time. The appearance in stationary optical spectra of complementary lines, which is consequence of quantum nature of EM-field, leading to Rabi wave packets' formation, is predicted for all quasi-1D systems with strong electron-photon interaction. The model proposed is considered on the example of perfect carbon quasi-1D zigzag shaped nanotubes, for which a new quasi-1D model, which is qualitatively different from well-known 2D-model, is proposed.Ó 2011 Elsevier B.V. All rights reserved.Quantum electrodynamics (QED) consideration of interaction of electromagnetic (EM) field with matter is used at present very rare in practical applications, for instance, quantum nature of EM-field is not taken into account by its interaction with nanoobjects like to carbon nanotubes (NTs), both in theoretical and experimental aspects [1,2]. There exists at present in QED-theory the analytical solutions of the task of the interaction of quantized EM-field with one qubit, that is the Jaynes-Cummings model (JCM), with multiqubit systems without interaction between qubits, that is the Tavis-Cummings model, and the model described in [3], which is the generalization of Tavis-Cummings model by taking into account the 1D-coupling between qubits. The model to be considered continues the given series, that is, it is the model of the interaction of quantized EM-field with quasi-1D multichain qubit system by taking into account both the intrachain and interchain qubit couplings without restriction on their values. Quasi-1D carbon zigzag-shaped nanotubes (CZSNTs) will represent multichain qubit system in the formulated task above.Quasi-1D CZSNTs can be considered (see further) to be the set of carbon backbones of trans-polyacetylene (t-PA) chains, which are connected between themselves, that is the qualitatively different model for quasi-1D CZSNTs will be proposed in comparison with the well-known 2D-model of NTs. The necessity in the given model is determined by analysis of experimental results, indicating, that with decrease of tube diameter the 2D-1D transition takes place and all physical properties of carbon NTs undergo qualitative leap. It is relevant to both the kinds of NTs, that is to rather perfect NTs produced by high energy ðP 1 Mev per nucleonÞ ion modification (HEIM) of diamond single crystals [4-6] and the so-called ultra-small NTs with 0.4 nm diameter, produced [7,8] inside the nanochannels of porous zeolite AlPO4-5 single crystals. It is interesting, that the authors of [7,8] are considering 0.4 nm diameter single wall nanotubes (SWNTs) to be ideal one-dimensional quantum hollow wires, that is in fact they come to the same conclusion concerning the 2D-1D transition presence. Analogous conclusion was recently done in [9] by electron spin resonance studies (ESR) of ultra-small NT...

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