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Chanfray, G.; Delorme, J.; Ericson, M.; Guichon, P.
Weak and electromagnetic interactions in nuclei1989
Weak and electromagnetic interactions in nuclei1989
AbstractAbstract
[en] Published in summary form only
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Depommier, P. (ed.); 849 p; ISBN 2-86332-072-6;
; 1989; p. 727-728; Editions Frontieres; Gif-sur-Yvette (France); International Symposium on Weak and Electromagnetic Interactions in Nuclei (WEIN-89); Montreal, PQ (Canada); 15-19 May 1989

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Book
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AbstractAbstract
[en] We analyze a model of a one-dimensional electron-gas interacting with an antiferromagnetic Heisenberg spin-1/2 chain via the spin-exchange interactions. Using a solution at a special limit, we characterize the gapless modes of the spin-gap fixed point at weak coupling JK<< JH,EF. We show that the only gapless pairing mode with divergent susceptibility is a composite odd-parity/odd-frequency singlet-pairing order parameter, while the ordinary BCS even-parity singlet-pairing mode is incoherent. For two-leg ladder systems, we note that it is possible to have a range of doping where the chemical potential cuts only the antibonding band while the bonding band remains half filled. We propose that in such a state the two-leg ladder is effectively realizing the one-dimensional Kondo-Heisenberg model
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Source
AC02-98CH10886; Othernumber: PRBMDO000064000003033103000001; 066127PRB
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Journal Article
Journal
Physical Review. B, Condensed Matter and Materials Physics; ISSN 1098-0121;
; v. 64(3); p. 033103-033103.4

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Farnea, E.
Surrey Univ., Guildford (United Kingdom)2001
Surrey Univ., Guildford (United Kingdom)2001
AbstractAbstract
No abstract available
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Source
Jan 2001; [vp.]; Available from British Library Document Supply Centre- DSC:DXN041640; Thesis (Ph.D.)
Record Type
Miscellaneous
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Thesis/Dissertation
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Schlottmann, P., E-mail: schlottm@phy.fsu.edu2004
AbstractAbstract
[en] Possible exchange mechanisms between sites with two electrons in three orbitals subject to strong Hund's rule correlations are studied. While three itinerant orbitals lead to antiferromagnetism, one localized and two itinerant orbitals give rise to ferromagnetism. The results are discussed in the context of the half-metallic ferromagnet CrO2
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Source
ICM 2003: International conference on magnetism; Rome (Italy); 27 Jul - 1 Aug 2003; S0304885303022790; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
Journal
Journal of Magnetism and Magnetic Materials; ISSN 0304-8853;
; CODEN JMMMDC; v. 272-276(1-2); p. 553-554

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Mehrabova, M.A; Nuriyev, I.R; Ismayilov, T.G; Kerimova, T.I; Mamishova, R.M
Instutute of Radiation Problems, Baku (Azerbaijan)
Perspectives of peaceful uses of nuclear energy. IV International conference2011
Instutute of Radiation Problems, Baku (Azerbaijan)
Perspectives of peaceful uses of nuclear energy. IV International conference2011
AbstractAbstract
[en] Full text: Narrow-band semimagnetic semiconductors (SMS) Pb1-xMnxTe are unique materials for infrared (IR) optoelectronics.The investigation of Faraday effect in Pb1-xMnxTe thin films of SMS is of a special interest. So it can be used at the construction of optic isolators, amplifiers, IR detectors and other equipments.In the given work Pb1-xMnxTe thin films (SMS) have been produced, the interband Faraday effect in these semiconductors has been theoretically and experimentally studied. Opportunities of making IR detectors have been studied. Pb1-xMnxTe (x=0.005 0.06) thin films have been grown at BaF2 substrates by the method of molecular beam condensation. The optimal conditions of producing thin films with high crystallic perfection, electrophysical and optical parameters have been determined [1]. The energy spectrum and wave functions have been theoretically calculated for quantum-sized films of Pb1-xMnxTe SMS in the case when the surface of the film is perpendicular to the axis X and the spin-spin exchange interaction occurs between the electrons in the conductivity band (valence band) and the electrons of half-filled d-shells of manganese ions as well as taking into account electron spins and the band nonparabolicity. For the calculation of the spectra and wave functions double-band Kane model has been used. On the basis of the found formulae an analytical equation has been found out for interband Faraday rotation (IFR) depending on the energy of the incident photon, band gap and the film thickness. It has been shown that by the decrease in the band gap the value of the IFR angle increases too [2]. The formula of parabolic approximation has been also obtained. The dependence of IFR angle on photon energy, band gap and the film thickness has been built. It has been specified that the decrease of the film thickness leads to a strong increase of IFR angle. The contribution of nonparabolicity into IFR angle has been established, so taking into consideration the band nonparabolicity results in the increase of IFR angle. In a nongap state a substantial increase occurs in IFR angle. The obtained results are in a good conformity with the experimental data. In this work the dependence of IFR angle on photon energy, band gap and the film thickness are given. It has been specified that the decrease of the film thickness leads to a strong increase of IFR angle.
Original Title
Nuve enerjisinin dinc megsedlerle istifadesi perspektivleri
Primary Subject
Source
Mahmud, K. (Ch; President, ANAS, Baku (AZ)); Adil, G. (Director, ANAS, Institute of Radiation Problems, Baku (AZ)); Dinara, A. (ANAS, Science advisor, Institute of Radiation Problems, Baku (AZ)) (and others); Institute of Radiation Problems, Baku (Azerbaijan). Funding organisation: Ministry of Communication and Information technologies, Baku (Azerbaijan); 147 p; Nov 2011; p. 69-70; 4. International conference on perspectives of peaceful uses of nuclear energy; Perspectives of peaceful use of nuclear energy; Baku (Azerbaijan); 23-25 Nov 2011; Available in abstract form only, full text entered in this record
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AbstractAbstract
No abstract available
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(c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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[en] Various approaches are discussed for producing polarized nuclear targets for high energy physics experiments. As a unifying theme, examples are drawn from experiments to measure spin dependent structure functions of nucleons in deep inelastic scattering. This single physics goal has, over roughly two decades, been a driving force in advances in target technology. Actual or planned approaches have included solid targets polarized by dynamic nuclear polarization (DNP), several types of internal targets for use in storage rings, and gaseous 3He targets polarized by spin-exchange optical pumping. This last approach is the type of target adopted for SLAC E-142, an experiment to measure the spin structure function of the neutron, and is described in detail
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DePorcel, L.; Dunwoodie, C. (eds.); Stanford Linear Accelerator Center, Menlo Park, CA (United States); 593 p; Dec 1994; p. 185-207; 21. annual SLAC Summer Institute on particle physics: spin structure in high-energy processes; Stanford, CA (United States); 26 Jul - 6 Aug 1993; Also available from OSTI as DE95008628; NTIS; US Govt. Printing Office Dep
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Report
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Silenko, A.Ya.
Summaries of reports of the XXXIV International conference on physics of charged particle-crystal interactions2004
Summaries of reports of the XXXIV International conference on physics of charged particle-crystal interactions2004
AbstractAbstract
No abstract available
Original Title
Dinamika spina ortopozitroniya v sredakh s polyarizovannymi ehlektronami
Source
Tulinov, A.F. (ed.); Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation); Nauchno-Issledovatel'skij Inst. Yadernoj Fiziki im. D.V. Skobel'tsyna, Moscow (Russian Federation); 168 p; 2004; p. 25; 34. International conference on physics of charged particle-crystal interactions; XXXIV mezhdunarodnaya konferentsiya po fizike vzaimodejstviya zaryazhennykh chastits s kristallami; Moscow (Russian Federation); 31 May - 2 Jun 2004; 4 refs.
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AbstractAbstract
[en] This contribution addresses the question of whether or not the ground state of a frustrated spin-1/2 Heisenberg model can be smoothly related to the ground state of a simple tight-binding model at half-filling in an appropriately chosen magnetic field. This continuity is considered explicitly for an eight-site square-lattice Hubbard model with nearest- and next-nearest-neighbor hopping, which approaches a frustrated Heisenberg model with nearest- and next-nearest-neighbor antiferromagnetic exchange coupling in the limit of large Hubbard U. In addition, a counterexample to the widely held belief that the half-filled band of the ordinary Hubbard model is nonmagnetic has been found in the regime where the hopping parameters and Hubbard interaction are all the same order of magnitude
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[en] Cooper pairing of electrons in a crystal with regularly distributed localized spins is considered. The case is studied in which exchange interaction between the electrons and localized spins leads to helical magnetic ordering of the localized spins in the superconducting state, whereas in the absence of superconductivity ferromagnetic order would occur. It is shown that scattering of conducting electrons by nonmagnetic impurities narrows the region of existence of the superconducting phase with spin ordering (HS phase). The narrowing, however, is not very pronounced even in dirty crystals. Thus the requirement of the purity of the crystals in which the HS phase may be observed is not very rigid
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Cover-to-cover translation of Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki (USSR).
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Journal Article
Journal
Soviet Physics - JETP; ISSN 0038-5646;
; v. 55(1); p. 115-120

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