Effect of the Orbital Level Difference in Doped Spin-1 Chains : Condensed Matter: Electronic Properties, etc.

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概要

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• The doping of a two-orbital chain with mobile S = 1/2 fermions and strong Hund's rule couplings stabilizing the S = 1 spins strongly depends on the presence of a level difference among these orbitals. Using density matrix renormalization group (DMRG) methos, we find a finite spin gap upon doping and dominant pairing correlations without level difference, whereas the presence of a level difference leads to dominant charge density wave (CDW) correlations with gapless spin-excitations. The string correlation function also shows qualitative differences between the two models.

• 社団法人日本物理学会の論文
• 2000-07-15

著者

• Ammon Beat

  Issp University Of Tokyo

• AMMON Beat

  ISSP, University of Tohyo

• IMADA Masatoshi

  ISSP, University of Tohyo

• Imada Masatoshi

  Issp University Of Tokyo

関連論文

• Doped Two Orbital Chains with Strong Hund's Rule Couplings-Ferromagnetism, Spin Gap, Singlet and Triplet Pairings : Condensed Matter: Electronic Properties, etc.
• Effect of the Orbital Level Difference in Doped Spin-1 Chains : Condensed Matter: Electronic Properties, etc.
• 24pWM-7 Critical Behavior of Disordered System in the Vicinity of Mott Transition

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