DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 1998 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Tiefe Temperaturen

TT 21: Postersitzung III: Spin-Peierls-Systeme, Metall-Isolator-Übergang, Lokalisierung; SL: Theorie; Quantenflüssigkeiten und -kristalle; Amorphe Materialien, Tunnelsysteme; Borcarbide, Fullerene, konventionelle SL; SL dünner Filme; Experimentiertechniken

TT 21.43: Poster

Thursday, March 26, 1998, 15:00–18:30, D

Numerical study of SO(5) symmetry in strong correlation models — •R. Eder1, A. Dorneich1, C. Gröber1, S. Meixner1, M. Zacher1, W. Hanke1, and S. C. Zhang21Institut für Theoretische Physik, Am Hubland, D-97074 Würzburg — 2Department of Physics, Stanford University, Stanford, CA 94305

In this work, we present numerical results which support SO(5) symmetry as a concept unifying superconductivity and antiferromagnetism in the high-temperature superconductors. Using exact cluster diagonalization, we verify that the low-energy states of the planar tJ model as well as tJ ladders, form SO(5) symmetry multiplets. Our results show that the d−wave superconducting ground states away from half-filling are obtained from the higher spin states at half-filling through SO(5) rotations.
We discuss implications of SO(5) symmetry for photoelectron spectroscopy, using a recently proposed exact SO(5) symmetric model, and propose a direct mapping between the exact model and ‘physical’ tJ ladders.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1998 > Regensburg