Journal of Superconductivity (J Supercond)

Publisher: Springer Verlag

Journal description

Journal of Superconductivity serves as the international forum for the most current information on the field. This highly acclaimed journal publishes peer-reviewed original papers and review articles that examine all aspects of the science and technology of superconductivity including new materials new mechanisms basic and technological properties new phenomena and small- and large-scale applications. Covering a wide scope of research the journal also features an annually updated bibliography on high T c superconductivity with entries cross-referenced by keywords developed by Dr. John Talvacchio of the Westinghouse R&D Center.

Current impact factor: 0.00

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2006 Impact Factor 0.461
2005 Impact Factor 0.553
2004 Impact Factor 0.793
2003 Impact Factor 0.794
2002 Impact Factor 0.764
2001 Impact Factor 0.718
2000 Impact Factor 0.823
1999 Impact Factor 1.032
1998 Impact Factor 0.798
1997 Impact Factor 0.851

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.00
Cited half-life 0.00
Immediacy index 0.00
Eigenfactor 0.00
Article influence 0.00
Website Journal of Superconductivity website
Other titles Journal of superconductivity and novel magnetism, Superconductivity and novel magnetism
ISSN 0896-1107
OCLC 61187376
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details

Springer Verlag

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Author's pre-print on pre-print servers such as arXiv.org
    • Author's post-print on author's personal website immediately
    • Author's post-print on any open access repository after 12 months after publication
    • Publisher's version/PDF cannot be used
    • Published source must be acknowledged
    • Must link to publisher version
    • Set phrase to accompany link to published version (see policy)
    • Articles in some journals can be made Open Access on payment of additional charge
  • Classification
    ​ green

Publications in this journal

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A recombination radiation line of real excitons in dense two-dimensional electron gas at the [100] silicon surface is observed in luminescence spectra of metal-oxide-semiconductor (MOS) structures. A new effect of anisotropic paramagnetic reduction of the luminescence line indicates a strong influence of the Kondo correlations on electron paramagnetism of the excitons.
    Journal of Superconductivity 02/2008; DOI:10.1023/A:1023688614168
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    ABSTRACT: The symmetry of the Bloch functions in the conduction band of tetragonal and orthorhombic La2CuO4 is examined for the existence of symmetry-adapted and optimally localizable (usual or spin-dependent) Wannier functions. It turns out that such Wannier functions do not exist in the tetragonal phase. In the orthorhombic phase, on the other hand, the Bloch functions can be unitarily transformed in three different ways into optimally localizable Wannier functions: they can be chosen to be adapted to each of the three phases observed in the pure or doped material, that is, to the antiferromagnetic phase, to the superconducting phase or to the phase evincing neither magnetism nor superconductivity. This group-theoretical result is proposed to be interpreted within a nonadiabatic extension of the Heisenberg model. Within this model, atomic-like states represented by these Wannier functions are responsible for the stability of each of the three phases. However, all the three atomic-like states cannot exist in the tetragonal phase, but are stabilized by the orthorhombic distortion of the crystal. A simple model is proposed which may explain the physical properties of La2-x Sr x CuO4 as a function of the Sr concentration x.
    Journal of Superconductivity 08/2006; 18(4):1-22. DOI:10.1007/s10948-005-0028-8
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    ABSTRACT: High-T c superconducting cuprates have two types of Fermi surfaces: simple-2D-tight-binding-band type (LSCO type) and the much deformed one (Bi2212 type). The difference is attributed to that of band parameter values, i.e., t′ ∼ −0.1 and t″ ∼ 0 versus t′ ∼ −0.3 and t″ ∼ 0.2 in terms of the second- and third-neighbor transfer energies t′ and t″, respectively (energy unit is the nearest-neighbor transfer energy t). Assuming a moderate value of on-site Coulomb energy U ∼ 6 and performing the variational Monte Carlo computation, we found that the two superconducting parameter domains exist in fact around these parameter sets, respectively, in which superconductivity predominates over spin density wave (SDW) due to the latter being at the brink of vanishing. Stripes were obtained in the first domain but tend to disappear in the second. In the latter domain there seems to exist parameter sets for which superconductivity appears without doping.
    Journal of Superconductivity 01/2006; 18:203-207. DOI:10.1007/s10948-005-0085-z
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    ABSTRACT: Similarly to the half-doped manganese oxides with perovskite structure like La0.5Ca0.5MnO3, the double perovskite compound NaMn7O12 contains an equal number of Mn3+ and Mn4+ ions in the corner-sharing network of MnO6 octahedra and exhibits a CE order of the charge and spins of these ions at low temperature. Though, in NaMn7O12 the order is complete, the charge and spin ordering transitions are sharp and the system is free of disorder, phase coexistence or structural inhomogeneities thanks to the absence of chemical substitutions. Here we discuss two unusual features of the CE structure of NaMn7O12: (1) the e g 3d x 2−y 2 orbital ordering expected from the direct crystallographic observation of compressed Mn3+O6 octahedra below the charge ordering transition; (2) the existence of a large amount of low-energy excitations evidenced by the low temperature behavior of the specific heat. We propose a picture of nearly degenerate spin and orbital configurations of the CE structure arising from the peculiar orbital ordering. KEY WORDS:half-doped manganese oxides–CE-structure–orbital ordering–low-energy excitations.
    Journal of Superconductivity 01/2006; 18:75-80. DOI:10.1007/s10948-005-0057-3
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    ABSTRACT: Here we present a reviewed phase diagram of the high-T c superconducting YBa2Cu3O6+ x compound, finely mapped in the strongly underdoped region (0 < x < 0.5), from the pure antiferromagnetic state to the superconducting regime. The Neèl and spin freezing temperatures have been measured by μSR experiments while the hole density per Cu atom in the CuO2 planes has been determined from the resistive T c and from Seebeck coefficients at 290K. The phase diagram is discussed in comparison to those of La2− x Sr x CuO4 and Y1− x Ca x Ba2Cu3O6 cuprate systems. KEY WORDS:YBa2Cu3O6+ x –high T c superconductors–antiferromagnetism–muon spin spectroscopy
    Journal of Superconductivity 11/2005; 18(5):769-772. DOI:10.1007/s10948-005-0078-y
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    ABSTRACT: In the present work, the results of recent neutron scattering, STM, and NMR experiments concerning the structure of the vortex core in resistive state of the cuprates are discussed. It is demonstrated that “field-induced” antiferromagnetic (SDW) ordering observed in the SC state is the same as “temperature-induced” one arising above T c in the pseudogap (SDW) state. It is pointed out that in resistivity measurements, due to short mobile charge carrier relaxation time, a magnetic structure is sampled on much shorter time scale as compared with other techniques such as neutron scattering, Mossbauer effect, etc. It is noted that existing theoretical models mainly consider the SDW order only as competing to the SC one rather than stimulating the SC to appear at higher temperature. KEY WORDS:spin fluctuations–spin density wave–psseudogap–stripe structure
    Journal of Superconductivity 11/2005; 18(5):713-717. DOI:10.1007/s10948-005-0068-0
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    ABSTRACT: We have studied the variation of superconducting critical temperature T c as a function of electron doping in the Mg10B2 system using Sc for Mg substitution. The critical temperature in the10B isotope substituted system Mg1− x Sc x 10B2 increases by increasing the scandium content x in the range 0xT c of the natural boron system Mg1− x Sc x B2 is nearly constant. The overall difference of T c in Mg1− x Sc x B2 as function of x between the natural B and 10B isotope system seems to indicate that the isotope effect shows large variations with electron doping as expected for the T c enhancement driven by a shape resonance.
    Journal of Superconductivity 11/2005; 18(5):67-70. DOI:10.1007/s10948-005-0053-7
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    ABSTRACT: In this paper we present a theory of the high critical temperature superconductors (HTSC). As has been shown directly by Scanning Tunneling Microscopy (STM) and indirectly by neutron diffraction, these materials are not homogeneous. We suppose that, at temperatures detected by some experiments, these compounds go through a phase separation which essentially creates regions with low and large doping around the average doping level. Using a Bogoliubov–deGennes local theory, we calculate the superconducting local gap as function of the density, for islands with 10–14 lattice parameters on average. We argue that this procedure is suitable to explain many HTSC properties and their universal phase diagram. PACS:74.72.-h–74.80-g–74.20.De–02.70.Bf
    Journal of Superconductivity 11/2005; 18(5):653-657. DOI:10.1007/s10948-005-0065-3
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    ABSTRACT: Recent infrared absorption measurements performed at different pressures and temperatures on the La0.75Ca0.25MnO3 manganite provided an estimate of the insulator-to-metal transition temperature T IM(P), i.e., the P-T phase diagram of a pseudocubic manganite. Here we consider in detail the P- and T-dependence of the absorption spectral weights n *. The n *(T,P) behavior gives evidence of phase-separation between conducting and insulating domains in the P-T phase diagram, and allows to establish the occurrence of a characteristic temperature T * ≅ 0.6 T IM. For T > T *, when insulating domains decrease on decreasing temperature or on increasing pressure, it is possible to distinguish a metallic region (connected metallic domains) for T * < T < T IM, and an insulating region (disconnected metallic domains) for T > T IM. Below T *, no reduction of the insulating domains, that may still exist, occurs.
    Journal of Superconductivity 11/2005; 18(5-6). DOI:10.1007/s10948-005-0054-6
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    ABSTRACT: Recent evidence suggests that in electron-doped cuprates, superconductivity arises near a quantum critical point associated with Mott gap collapse. A similar calculation for hole-doped cuprates is complicated by the presence of competing instabilities. KEY WORDS:electron-doped cuprates–quantum critical point–Mott gap–antiferromagnetism
    Journal of Superconductivity 11/2005; 18(5):709-712. DOI:10.1007/s10948-005-0064-4
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    ABSTRACT: Soft X-ray resonant diffraction is a new technique and there exist several examples of large resonant enhancements of charge and magnetic scattering that can be obtained at the L-edges of 3d transition metal oxides. Here we have employed resonant soft X-ray scattering at the manganese L edges which provide a direct measurement of the orbital ordering. We have studied the layered manganite La0.5Sr1.5MnO4 that displays charge, spin, and orbital ordering. Energy scans at constant wavevector show that there are two separate contributions to the observed scattering, direct Goodenough orbital ordering and strong cooperative Jahn–Teller distortions of the Mn3+ ions. Finally we will show how that the charge, spin and orbital degrees of freedom are strongly correlated in these materials. KEY WORDS:orbital ordering–manganites–X-ray scattering–synchrotron radiation
    Journal of Superconductivity 11/2005; 18(5):687-691. DOI:10.1007/s10948-005-0059-1
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    ABSTRACT: We calculate the superconducting density for a model cuprate with gapped itinerant and defect subsystems brought into spectral overlap by progressive doping. The interband nature of the pairing prevents the manifestation of the normal state gaps in the superconducting density. These “extrinsic” gaps drive the pseudogap behavior until the overlap concentrations are reached. Further doping changes the nature of the quasiparticle minimal excitation energy and a pseudogap is transformed into the corresponding superconducting gap. The Uemura-type plot contains a sublinear segment at underdoping. KEY WORDS:Cuprate–Interband model–Superconducting density–Pseudogap
    Journal of Superconductivity 11/2005; 18(5):705-708. DOI:10.1007/s10948-005-0063-5
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    ABSTRACT: The phonon modes with strong electron–phonon interactions were investigated by two-phonon Raman scattering in p- and n-type high T c superconductors. In p-type superconductors, the strong electron–phonon interaction mode changes from the breathing mode at (π, π) to the half breathing mode at (π, 0) as carrier density increases across the optimum doping in LSCO or the 60K phase in YBCO. It is in good accordance with the change of the superconducting coherent peak position in k-space. In n-type superconductors, the strong electron–phonon interaction modes change from (0.4π, 0.4π) to (0.4π, 0) at the insulator–superconductor transition. Electron–phonon interactions play an important role in superconductivity. KEY WORDS:electron–phonon interaction–quasi-particle band
    Journal of Superconductivity 11/2005; 18(5):779-783. DOI:10.1007/s10948-005-0080-4