Analysis of NMR data in the superconducting state of YBa2Cu3O7

N. Bulut; D. J. Scalapino

doi:10.1103/PhysRevLett.68.706

← Back to search

Analysis of NMR data in the superconducting state of YBa2Cu3O7

N. Bulut, D. J. Scalapino

DOI 10.1103/PhysRevLett.68.706 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We have extended a weak-coupling theory of antiferromagnetic fluctuations to the superconducting state and analyzed NMR data for YBa2Cu3O7. Within this framework we find that while an s-wave gap structure with 2Δ(0)/kTc=4 can fit the Knight-shift data for Cu(2) and O(2,3), it does not provide a satisfactory fit to the T1−1 data. Using a dx2-y2-wave gap with 2Δ(0)/kTc of order 6 to 8 provides a reasonable fit to both the Knight-shift and T1−1 data.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown