Flux quantization and pairing in one-dimensional copper-oxide models

A. Sudbø, C. M. Varma, T. Giamarchi, Ellen Stechel, R. T. Scalettar

Research output: Contribution to journalArticle

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Abstract

We obtain the ground-state energy E0() exactly as a function of flux in a one-dimensional copper-oxide model on rings of finite circumference L, including on-site interactions and a nearest-neighbor interaction V. For V of the order of the charge-transfer gap or larger, the model extrapolated to large L exhibits flux quantization with charge 2e, and a slow algebraic decay of the singlet superconducting correlation function on oxygen sites. The extrapolated superfluid stiffness appears, however, finite only for not too large V. These results suggest a superconductive state at V of order the charge-transfer gap of the model, but a paired and phase-separated state at larger V.

Original languageEnglish
Pages (from-to)978-981
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number7
DOIs
Publication statusPublished - 1993

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flux quantization
copper oxides
charge transfer
circumferences
stiffness
interactions
ground state
rings
decay
oxygen
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Flux quantization and pairing in one-dimensional copper-oxide models. / Sudbø, A.; Varma, C. M.; Giamarchi, T.; Stechel, Ellen; Scalettar, R. T.

In: Physical Review Letters, Vol. 70, No. 7, 1993, p. 978-981.

Research output: Contribution to journalArticle

Sudbø, A. ; Varma, C. M. ; Giamarchi, T. ; Stechel, Ellen ; Scalettar, R. T. / Flux quantization and pairing in one-dimensional copper-oxide models. In: Physical Review Letters. 1993 ; Vol. 70, No. 7. pp. 978-981.
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