Indications of unconventional superconductivity in doped and undoped triangular antiferromagnets

Matthias Vojta; Elbio Dagotto

doi:10.1103/PhysRevB.59.R713

← Back to search

Indications of unconventional superconductivity in doped and undoped triangular antiferromagnets

Matthias Vojta, Elbio Dagotto

DOI 10.1103/PhysRevB.59.R713 · Physical Review B

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

The possibility of superconductivity in doped and undoped triangular antiferromagnets is discussed. Using the Bethe-Salpeter (BS) equation, it is shown that the exchange of random-phase approximation paramagnons on a triangular lattice Hubbard model leads to strong pairing correlations at and near half filling. The dominant states for this system correspond to d-wave singlet (even-frequency) and s-wave triplet (odd-frequency) pairing. Analytical techniques applied to the hole-doped t−J model yield similar results. A t1−t2 Hubbard model interpolating between square (t1=0) and triangular (t1=t2) lattices has a tendency to only d-wave singlet pairing for t1/t2<~0.8. Experimental consequences for organic compounds κ−(BEDT−TTF)2X are discussed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NaTiO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
RCuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(BEDT-TTF)2X Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown