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Doping of a two-orbital chain with mobile S=1/2 Fermions and strong Hund'srule couplings stabilizing the S=1 spins strongly depends on the presence of alevel difference among these orbitals. By DMRG methods we find a finite spingap upon doping and dominant pairing correlations without level-difference,whereas the presence of a level difference leads to dominant charge densitywave (CDW) correlations with gapless spin-excitations. The string correlationfunction also shows qualitative differences between the two models.Comment: 4 pages, 4 figure

Effect of the Orbital Level Difference in Doped Spin-1 Chains