Pairfield fluctuations of a 2D Hubbard model

Thomas A. Maier; Douglas J. Scalapino

doi:10.1038/s41535-019-0169-9

Pairfield fluctuations of a 2D Hubbard model

Thomas A. Maier, Douglas J. Scalapino

Computational Sciences & Engineering Div

University of California at Santa Barbara

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

14 Scopus citations

Abstract

At temperatures above the superconducting transition temperature, the pairfield susceptibility provides information on the nature of the pairfield fluctuations. Here, we study the d-wave pairfield susceptibility of a 2D Hubbard model for a doping which has a pseudogap (PG) and for a doping which does not. In both cases, there will be a region of Kosterlitz–Thouless fluctuations as the transition at T_KT is approached. Above this region, we find evidence for pairfield-order parameter-phase fluctuations for dopings with a PG and BCS Cooper pair fluctuations for dopings without a PG.

Original language	English
Article number	30
Journal	npj Quantum Materials
Volume	4
Issue number	1
DOIs	https://doi.org/10.1038/s41535-019-0169-9
State	Published - Dec 1 2019

Bibliographical note

Publisher Copyright:
© 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.

Funding

The authors would like to thank E. Abrahams, I. Bozovic, I. Esterlis, M. Fisher, S. Kivelson, P.A. Lee, and A.-M. Tremblay for useful comments. We also thank I. Esterlis for the xy Monte-Carlo results shown in Fig. 4 and S. Kivelson for his comment regarding the relationship of this work to granular superconducting films. This work was supported by the Scientific Discovery through Advanced Computing (SciDAC) program funded by the U.S. Department of Energy, Office of Science, Advanced Scientific Computing Research and Basic Energy Sciences, and Division of Materials Sciences and Engineering. An award of computer time was provided by the INCITE program. This research used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725.

Funders	Funder number
Advanced Scientific Computing Research and Basic Energy Sciences
DOE Office of Science	DE-AC05-00OR22725
U.S. Department of Energy
Office of Science
Division of Materials Sciences and Engineering

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Pairfield fluctuations of a 2D Hubbard model

Abstract

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