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

J. W. Halley; S. Davis; P. Samsel; Robert Joynt

doi:10.1007/BF02747481

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

J. W. Halley, S. Davis, P. Samsel, Robert Joynt

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We describe studies of the effects of defects on Hubbard models of high T_c superconductors. We first present numerical mean field calculations on the t-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.

Original language	English (US)
Pages (from-to)	1069-1074
Number of pages	6
Journal	Bulletin of Materials Science
Volume	14
Issue number	4
DOIs	https://doi.org/10.1007/BF02747481
State	Published - Aug 1991

Keywords

Hubbard models
Point defects
oxides

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abstract = "We describe studies of the effects of defects on Hubbard models of high T c superconductors. We first present numerical mean field calculations on the t-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.",

keywords = "Hubbard models, Point defects, oxides",

author = "Halley, {J. W.} and S. Davis and P. Samsel and Robert Joynt",

year = "1991",

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AU - Halley, J. W.

AU - Davis, S.

AU - Samsel, P.

AU - Joynt, Robert

PY - 1991/8

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N2 - We describe studies of the effects of defects on Hubbard models of high T c superconductors. We first present numerical mean field calculations on the t-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.

AB - We describe studies of the effects of defects on Hubbard models of high T c superconductors. We first present numerical mean field calculations on the t-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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KW - Point defects

KW - oxides

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JO - Bulletin of Materials Science

JF - Bulletin of Materials Science

SN - 0250-4707

IS - 4

ER -

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

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