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Spinon-Holon binding in $t-J$ model

Tai-Kai Ng
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Abstract

Using a phenomenological model, we discuss the consequences of spinon-holon binding in the U(1) slave-boson approach to $t-J$ model. Within a small $x$ ($x=$ hole concentration) expansion, we show that spinon-holon binding produces a pseudo-gap normal state with a segmented Fermi surface and the superconducting state is formed by opening an "additional" d-wave gap on the segmented Fermi surface. The d-wave gap merge with the pseudo-gap smoothly as temperature $T\to0$. The quasi-particles in the superconducting state are coupled to external electromagnetic field with a coupling constant of order $x^γ$ where $0\leqγ\leq1/2$, depending on the strength of the effective spinon-holon binding potential.

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Tai-Kai Ng. 2004-08-18. Spinon-Holon binding in $t-J$ model. https://doi.org/10.1103/physrevb.71.172509

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