• J W Halley

      Articles written in Bulletin of Materials Science

    • Calculations of the effects of point defects on hubbard models of high temperature superconductivity

      J W Halley S Davis P Samsel Robert Joynt

      More Details Abstract Fulltext PDF

      We describe studies of the effects of defects on Hubbard models of highTc superconductors. We first present numerical mean field calculations on thet-J model in which disorder due to point defects in treated explicitly. Secondly, we describe variational Monte Carlo calculations at zero temperature in which the full effects of the Gutzwiller projection are included in a calculation of the variational BCS ground state including randomly distributed point defects. Finally we discuss possible microscopic mechanisms by which point defects could enhance pairing in the BCS state.

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