Pseudogap phase in the U(1) gauge theory with incoherent spinon pairs

Details Pseudogap phase in the U(1) gauge theory with incoherent spinon pairs Pseudogap phase in the U(1) gauge theory with incoherent spinon pairs

1999-04-09

arxiv.org/abs/cond-mat/9904120v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.61.8683

The pseudogap effect of underdoped high-$T_c$ superconductors is studied in the U(1) gauge theory of the t-J model including the spinon pairing fluctuation. The gauge fluctuation breaks the long range correlation between the spinon pairs. The pairing fluctuation, however, suppresses significantly the low-lying gauge fluctuations and leads to a stable but phase incoherent spin gap phase which is responsible for the pseudogap effects. This quantum disordered spin gap phase emerges below a characteristic temperature $T^{*}$ which is determined by the effective potential for the spinon pairing gap amplitude. The resistivity is suppressed by the phase fluctuation below $% T^{*}$, consistent with experiments.

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