Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
home > search

Now showing items 33 - 48 of 27475

  • F. Scott Fitzgerald\"s TENDER IS THE NIGHT: Nicole Diver\"s Secret History

    Shapiro   Brendan L.  

    Download Collect
  • Hawley\"s Condensed Chemical Dictionary, Sixteenth Edition || F

    Larra?aga, Michael D.   Lewis, Richard J.   Lewis, Robert A.  

    Download Collect
  • Introduction of the 41st Lauriston S. Taylor Lecturer: F. Ward Whicker

    Whicker, Jeffrey J.  

    Download Collect
  • Detection of small exchange fields in S/F structures

    A.S. Vasenko   S. Kawabata   A. Ozaeta   A.A. Golubov   V.S. Stolyarov   F.S. Bergeret   F.W.J. Hekking  

    Abstract Ferromagnetic materials with exchange fields E ex smaller or of the order of the superconducting gap Δ are important for applications of corresponding (s-wave) superconductor/ferromagnet/superconductor (SFS) junctions. Presently such materials are not known but there are several proposals how to create them. Small exchange fields are in principle difficult to detect. Based on our results we propose reliable detection methods of such small E ex . For exchange fields smaller than the superconducting gap the subgap differential conductance of the normal metal–ferromagnet–insulator–superconductor (NFIS) junction shows a peak at the voltage bias equal to the exchange field of the ferromagnetic layer, eV = E ex . Thus measuring the subgap conductance one can reliably determine small E ex < Δ . In the opposite case E ex > Δ one can determine the exchange field in scanning tunneling microscopy (STM) experiment. The density of states of the FS bilayer measured at the outer border of the ferromagnet shows a peak at the energy equal to the exchange field, E = E ex . This peak can be only visible for small enough exchange fields of the order of few Δ . Highlights • We summarize different proposals to create ferromagnets with small exchange fields. • We propose methods to measure small exchange fields in F/S structures. • Exchange fields smaller than the gap can be detected by measuring the dI/dV. • Exchange fields larger than the gap can be detected in STM experiments.
    Download Collect
  • Reliability of a toroidal connected-(r,s)-out-of-(m,n):F lattice system

    Nakamura, Taishin   Yamamoto, Hisashi   Akiba, Tomoaki  

    Download Collect
  • O ensino de f=C3=ADsica contextualizado ao s=C3=A9culo XXI

    Belan=C3=A7on, Marcos Paulo  

    In this letter I present my point of view about the importance of contextualization of physics and its outspread over society in the teaching of physics. I point my questioning about the real origin of disciplinas like =E2=80=9Cscience, technologie and society=E2=80=9D (CTS) and =E2=80=9Cscientific and technological alphabetization=E2=80=9D (ACT), arguing that maybe one should discuss the structure of teaching physics instead of =E2=80=9Cadd=E2=80=9D one step that aims to correct the lack we have created between physics and society. Many theoretical have remembered that CTS and ACT were born from a Freirean point of view about teaching, however what we have seen in practical is the insistence in the method and bibliographies older than this pedagogical movement.=09
    Download Collect
  • F. Albert Cotton Award in Synthetic Inorganic Chemistry: A. S. Borovik

    Download Collect
  • F. Albert Cotton Award in Synthetic Inorganic Chemistry: A. S. Borovik

    Download Collect
  • Synthesis of N, F and S co-doped graphene quantum dots

    Kundu, Sumana   Yadav, Ram Manohar   Narayanan, T. N.   Shelke, Manjusha V.   Vajtai, Robert   Ajayan, P. M.   Pillai, Vijayamohanan K.  

    Graphene quantum dots (GQDs) are a promising category of materials with remarkable size dependent properties like tunable bandgap and photoluminescence along with the possibility of effective chemical functionalization. Doping of GQDs with heteroatoms is an interesting way of regulating their properties. Herein, we report a facile and scalable one-step synthesis of luminescent GQDs, substitutionally co-doped with N, F and S, of similar to 2 nm average size by a microwave treatment of multi-walled carbon nanotubes in a customized ionic liquid medium. The use of an ionic liquid coupled with the use of a microwave technique enables not only an ultrafast process for the synthesis of co-doped GQDs, but also provides excellent photoluminescence quantum yield (70%), perhaps due to the interaction of defect clusters and dopants.
    Download Collect
  • Association of secondary traits with yield in maize F 1 's

    Nardino, Maicon   Souza, Velci Queiróz de   Baretta, Diego   Konflanz, Valmor Antonio   Carvalho, Ivan Ricardo   Follmann, Diego Nicolau   Caron, Braulio Otomar  

    Download Collect
  • f(J) (2220) and hadronic (B)over-bar(s)(0) decays

    Hsiao, Y. K.   Geng, C. Q.  

    We study the hadronic (B) over bar (0)(s) decays based on the existence of the resonant state f(J) (2220). In particular, we are able to explain the unexpected large experimental result of (B) over bar (0)(s) -> J/psi p (p) over bar) =3D (3.0(-1.1)(+1.2) +/- 0.52 +/- 0.03) x 10(-6) measured recently by the LHCb collaboration due to the resonant contribution in (B) over bar (0)(s) -> J/psi f(J) (2220) with f(J) (2220) -> p (p) over bar, while it is estimated to be at most of order 10(-9) in terms of the OZI rule without the resonance. In addition, we find that B((B) over bar (0)(s) -> D*(0)(f(J) ->) p (p) over bar) =3D (4.70 +/- 2.89) x 10(-7), B((B) over bar (0)(s) -> J/psi(f(J) ->) pi pi) =3D (15.6 +/- 15.2) x 10(-6), and B((B) over bar (0)(s) -> D*(0)(f(J) ->) pi pi) =3D (24.5 +/- 24.4) x 10(-7), while B((B) over bar (0)(s) -> J/psi(f(J) ->) K (K) over bar) < 1.6 x 10(-5) and B(<(B)over bar>(0)(s) -> D*(0)(f(J) ->) K (K) over bar) < 2.5x10(-6). Moreover, wepredict that the decay branching ratios of <(B)over bar>(0)(s) -> (J/psi, D*(0)) Lambda(Lambda) over bar are (2.68 +/- 1.23) x 10(-7) and (2.25 +/- 0.80) x 10(-6). Some of the predicted (B) over bar (0)(s) decays are accessible to the experiments at the LHCb.
    Download Collect
  • Nanotechnologie. Von S. Sepeur, N. Laryea, S. Goedicke, F. Groß.

    W. Fürbeth  

    Download Collect
  • Effective indirect multi-site spin–spin interactions in the s–d(f) model

    Komarov, K.K.   Dzebisashvili, D.M.  

    Download Collect
  • Obituary: John F. Mullan, MD, 1925–2015: neurosurgery\"s modern statesman

    Awad, Issam A.   Hekmatpanah, Javad   Frim, David  

    Download Collect
  • Sittig\"s Handbook of Pesticides and Agricultural Chemicals || F

    Pohanish   Richard P.  

    Download Collect
  • Expansion, random walks and sieving in\(S{L_2}({\mathbb{F}_p}[t])\)

    Henry Bradford  

    We construct new examples of expander Cayley graphs of finite groups, arising as congruence quotients of non-elementary subgroups of modulo certain square-free ideals. We describe some applications of our results to simple random walks on such subgroups, specifically giving bounds on the rate of escape of such walks from algebraic subvarieties, the set of squares and the set of elements with reducible characteristic polynomial in .
    Download Collect
1 2 3 4 5 6 7 8 9 10

Contact

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

Submit Feedback