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arXiv 0808.0281cond-mat.str-el
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LiCu2O2自旋1/2量子物质的多铁性

Multiferroicity in the spin-1/2 quantum matter of LiCu2O2

A. Rusydi, I. Mahns, S. Mueller, M. Ruebhausen, S. Park, Y. J. Choi, C. L. Zhang, S-W. Cheong, S. Smadici, P. Abbamonte, M. v. Zimmermann, G. A. Sawatzky

摘要:

利用共振软X射线磁散射、硬X射线衍射、热容、磁化率和电极化研究了LiCu 2 O2单晶的多铁性。在24.6K(T_1)和23.2K(T_2)发现两个磁转变。我们的数据与正弦自旋结构在T2<T<T1和螺旋自旋结构在T<T2引起铁电性是一致的。令人惊讶的是,在T2以上,自旋结构的相关长度随着温度的增加而增加,沿着c轴的变化幅度约为42%。我们的结果表明,几何挫折和电子和磁场的极化的相互作用。

英文摘要:

Multiferroicity in LiCu2O2 single crystals is studied using resonant soft x-ray magnetic scattering, hard x-ray diffraction, heat capacity, magnetic susceptibility, and electrical polarization. Two magnetic transitions are found at 24.6 K (T1) and 23.2 K (T2). Our data are consistent with a sinusoidal spin structure at T2<T<T1 and with a helicoidal spin structure at T<T2 giving rise to ferroelectricity. Surprisingly, above T2 the correlation lengths of the spin structures increase as the temperature increases with dramatic changes of ~42% along the c-axis. Our results demonstrate the interplay of the geometrical frustration and the electronic and magnetic polarizations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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