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Evidence for Correlation between Spin and Charge Dynamics in $La_2Cu_{1-x}Li_xO_4$

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31

P3

Evidence for Correlation between Spin and Charge Dynamics in

La

2

Cu

1-x

Li

x

O

4

Eunsung Park

a

, Tuson Park

a,b

, J. L. Sarrao

b

, and J. D. Thompson

b

a Sungkyunkwan University, Suwon 440-746, Korea b Los Alamos National Laboratory, Los Alamos, NM 87545, USA

Study on the hole-doped La2Cu1-xLixO4 has attracted a lot of interest partially because of such interesting phenomena as quantum critical point, spin glass and charge glass, which may have significant bearing on the superconducting mechanism of the high-Tc cuprates. Measurement of the ac magnetic susceptibility of La2Cu1-xLixO4 at x=0.023 revealed a spin-glass behavior, where the spin freezing temperature TSG varies as a function of the applied frequency. Direct comparison between TSG and TCG, the charge freezing temperature, suggests that spin and charge degrees of freedom are correlated in this strongly correlated hole-doped cuprate. Keywords: High-Tc cuprates, Spin glass, Charge glass

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