Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 3: Spin-Systeme und itinerante Magnete

TT 3.8: Vortrag

Montag, 8. März 2004, 11:15–11:30, H18

Spin dynamics of 1D supersymmetric t-J model with 1/r2 interaction — •Mitsuhiro Arikawa — Institut fuer Theoretische Physik III, Universitaet Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart

We report on analytic results on dynamical spin structure factor S(q,ω) for 1D supersymmetric t-J model with 1/r2 interaction. In this model, the elementary excitations, spinons and holons appear as free particle obeying fractional statistics. we presented that interpretation of S(q,ω) requires both fractionalized and non-fractionalized electrons. Our results constitutes the first analytical knowledge for S(q,ω) of lattice electrons with no restriction on the density and the momentum-frequency range. We discuss how these excitations appear in the dynamics in wide range energy region.