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In this paper we show that local spin-singlet amplitude with d-wave symmetry,$<|\Delta_{d}(0)|^{2}>$, can be induced by short-range spin correlations evenin the absence of pairing interactions. Fluctuation theory is formulated tomake connection between pseudogap temperature $T^{*}$, pseudogap size$\Delta_{pg}$ and $<|\Delta_{d}(0)|^{2}>$. In the present scenario for thepseudogap, the normal state pseudogap is caused by the induced localspin-singlet amplitude due to short-range spin correlations, which compete inthe low energy sector with superconducting correlations to make $T_{c}$ go tozero near half-filling. Calculated $T^{*}$ falls from a high value onto the$T_{c}$ line and closely follows mean-field N\'{e}el temperature $T_{N}^{MF}$.The calculated $\Delta_{pg}$ is in good agreement with experimental results. Wepropose an experiment in which the present scenario can be critically tested.Comment: 5 pages, 3 figure

physical review. b, condensed matter

Induced local spin-singlet amplitude and pseudogap in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>cuprates

Induced local spin-singlet amplitude and pseudogap in high-Tccuprates