Influence of the additional second-neighbor hopping on the spin response in the t-J model

Article

关键词: COPPER-OXIDE MATERIALS;    VALENCE-BOND STATE;    NEUTRON-SCATTERING;    MAGNETIC FLUCTUATIONS;    DOPING DEPENDENCE;    CHARGE DYNAMICS;    CU OXIDES;    ANTIFERROMAGNETISM;    SUSCEPTIBILITY;    YBA2CU3O6+X;   

DOI  :  10.1103/PhysRevB.62.134

来源: SCIE

【 摘 要 】

The influence of the additional second-neighbor hopping t' on the spin response of the t-J model in the underdoped and optimally doped regimes is studied within the fermion-spin theory. Although the additional second-neighbor hopping t' is systematically accompanied by the reduction of the dynamical spin structure factor and susceptibility, the qualitative behavior of the dynamical spin structure factor and susceptibility of the t-t'-J model is the same as in the case of t-J model. The integrated dynamical spin structure factor spectrum is almost t' independent, and the integrated dynamical spin susceptibility still shows the particularly universal behavior as I(omega,T) proportional to arctan[a(1) omega/T+a(3)(omega/T)(3)].

【 授权许可】

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