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  1. No Access

    Chapter and Conference Paper

    Fulde-Ferrell-Larkin-Ovchinnikov-Like State in Ferromagnet-Superconductor Proximity System

    We discuss some properties of the ferromagnet — superconductor proximity system. In particular, the emphasis is put on the physics of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state. In addition to Andreev...

    B. L. Györffy, M. Krawiec, J. F. Annett in Physics of Spin in Solids: Materials, Meth… (2005)

  2. No Access

    Article

    Gap nodes and time reversal symmetry breaking in strontium ruthenate

    We study the superconducting state of Sr2RuO4 on the bases of a phenomenological but orbital specific description of the electron-electron attraction and a realistic quantitative account of the electronic structu...

    J. F. Annett, B. L. Györffy, G. Litak… in The European Physical Journal B - Condense… (2003)

  3. No Access

    Article

    Spin polarized current in the ground state of superconductor-ferromagnet-insulator trilayers

    We study the ground state properties of a superconductor-ferromagnet-insulator trilayer on the basis of a Hubbard Model featuring exchange splitting in the ferromagnet and electron-electron attraction in the s...

    M. Krawiec, B.L. Györffy, J.F. Annett in The European Physical Journal B - Condense… (2003)

  4. No Access

    Chapter

    The Behaviour of a Triplet Superconductor in a Spin Only Magnetic Field

    We investigate the order parameter of Sr2RuO4 in an exchange-only magnetic field. A Ginzburg-Landau symmetry analysis implies three possibilities: a pure 3He A phase, a 3He A1 or a 3He A2 phase. We explore the ex...

    B. J. Powell, J. F. Annett, B. L. Györffy in Ruthenate and Rutheno-Cuprate Materials (2002)

  5. No Access

    Chapter

    P-Wave Pairing in Superconducting Sr2RuO4

    Although there is strong evidence that Sr2RuO4 is a triplet superconductor [2, 3], the full symmetry of the equilibrium state below Tc remains open to debate [2-14]. There exist strong indications for broken time...

    G. Litak, J. F. Annett, B. L. Györffy, K. I. Wysokiński in New Trends in Superconductivity (2002)

  6. No Access

    Chapter

    Superconductivity in Disordered Sr2RuO4

    We discus the influence of disorder on the critical temperature T c of a p-wave superconductor. To describe disordered Sr2RuO4 we use extended Hubbard m...

    G. Litak, J. F. Annett, B. L. Györffy in Open Problems in Strongly Correlated Elect… (2001)

  7. No Access

    Chapter

    The Fermi Surfaces of Metallic Alloys and the Oscillatory Magnetic Coupling Between Magnetic Layers Separated by Such Alloy Spacers

    We review the theory of oscillatory magnetic coupling in metallic multilayers across alloy spacers. We illustrate the relationship between the frequencies of the oscillations and the extremal caliper vectors o...

    B. L. Györffy, N. N. Lathiotakis in Properties of Complex Inorganic Solids 2 (2000)

  8. No Access

    Chapter

    The Onsager Cavity Field in FCC Alloys

    We discuss phase diagrams and concentration variations near surfaces of fcc alloys on the basis of replacing the Weiss field, in the Bragg-Williams approximation, by the Onsager Cavity field. We argue that thi...

    S. Shallcross, B. L. Györffy in Properties of Complex Inorganic Solids 2 (2000)

  9. No Access

    Article

    Interaction of Magnetic Impurities with Surfaces

    The interaction of a magnetic (Fe) impurity with the surface of a non-magnetic (Au) semi-infinite host is investigated in terms of fully relativistic spin-polarized first principles calculations. It is shown t...

    L. Szunyogh, B. L. Györffy in MRS Online Proceedings Library (1997)

  10. No Access

    Chapter

    Anderson Theorem and Spatial Fluctuations in the Gap of Disordered Superconductors

    We review the derivation of the Andersons theorem for a simple, negative-U Hubbard model of disordered superconductors and investigate the circumstances under which it governs the nature of superconducting state....

    B. L. Györffy, G. Litak, K. I. Wysokiński in Fluctuation Phenomena in High Temperature … (1997)

  11. No Access

    Chapter

    Statics and Dynamics of Alloy Phase Transformations Opening Remarks

    Although a cliche it is nevertheless true that materials science is one of the pillars of Western Civilization and phase diagrams are one of its central preoccupations1. Most materials properties change smoothly,...

    B. L. Györffy in Statics and Dynamics of Alloy Phase Transformations (1994)

  12. No Access

    Chapter

    First Principles Theory of Disordered Alloys and Alloy Phase Stability

    Almost immediately after the discovery of quantum mechanics, physicists and metallurgist began the task of trying to understand the origins of alloy phase stability in terms of the underlying electronic struct...

    G. M. Stocks, D. M. C. Nicholson… in Statics and Dynamics of Alloy Phase Transf… (1994)

  13. No Access

    Chapter

    First Principles Theory of Alloy Phase Stability: Ordering and Pre-Martensitic Phenomena in β-Phase NiAl

    We review, briefly, the first principles KKR-CPA theory of the electronic structure and energetics of alloys in which compositional disorder plays a role. We also review the first principles theories of orderi...

    G. M. Stocks, W. A. Shelton, D. M. Nicholson… in Ordered Intermetallics — Physical Metallur… (1992)

  14. No Access

    Chapter

    On the Causes of Compositional Order in NiPt Alloys

    We review, briefly, the arguments which gave rise to the current controversy concerning the origin of compositional order in NicPt(1-c) alloys. We note that strain fluctuations play an important role in determini...

    B. L. Györffy, F. J. Pinski, B. Ginatempo… in Structural and Phase Stability of Alloys (1992)

  15. No Access

    Article

    The Electronic Structure and Phase Stabilities of Metallic Alloys

    Condensed matter consists of positively charged atomic nuclei and the electron ‘glue’ which holds them together. Although it is attractive to attempt to model it by neutral atoms interacting via relatively wea...

    B. L. Györffy, A. Barbieri, D. D. Johnson… in MRS Online Proceedings Library (1990)

  16. No Access

    Article

    Local Environmental Effects in Magnetic Alloys and Multilayers: Calculations of the Static Response Functions

    We have developed an ab-initio method for calculating the static response functions in substitutional alloys. For magnetic alloys, in addition to the nuclear diffuse scattering, a contribution to the alloy dif...

    D. D. Johnson, J. B. Staunton, B. L. Györffy… in MRS Online Proceedings Library (1989)

  17. No Access

    Book

    Electrons in Disordered Metals and at Metallic Surfaces

    P. Phariseau, B. L. Györffy… in NATO Advanced Study Institutes Series (1979)

  18. No Access

    Chapter

    On the Lectures Whose Full Text Does Not Appear in this Book

    An excellent introductory reference to the entire subject of surface states can be found in the article “Electron States at Clean Surfaces” by F. Forstmann, which appears in the book “Photoemission and the Ele...

    P. Phariseau, B. L. Györffy, L. Scheire in Electrons in Disordered Metals and at Meta… (1979)

  19. No Access

    Chapter

    First Principles Band Theory for Random Metallic Alloys

    Two years ago at an Advanced Study Institute in Gent, we had given five lectures on the same topics as treated here. Since then the subject developed considerably and we have written an entirely new set of lec...

    B. L. Györffy, G. M. Stocks in Electrons in Disordered Metals and at Metallic Surfaces (1979)

  20. No Access

    Chapter

    Aspects of the Numerical Solution of the KKR-CPA Equations

    In this lecture, we review some of the difficulties encountered in the solution of the KKR-CPA equations and the numerical techniques developed to overcome them.

    G. M. Stocks, W. M. Temmerman, B. L. Györffy in Electrons in Disordered Metals and at Meta… (1979)