Non-Fermi liquid behavior and scaling of the low-frequency suppression in the optical conductivity spectra of CaRuO3 -: art. no. 041104
Non-Fermi liquid behavior and scaling of the low-frequency suppression in the optical conductivity spectra of CaRuO3 -: art. no. 041104
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DOI：
10.1103/physrevb.66.041104
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发表时间：
2002-07-15
影响因子：
3.7
通讯作者：
Eom, CB
中科院分区：
文献类型：
--
作者：
Lee, YS;Yu, JJ;Eom, CB
研究了顺磁性 CaRuO3 在不同温度下的光导谱 sigma(1)(omega)。在 T=10 K 时，它表现出类似于 1/omega(1/2) 的 sigma(1)(omega) 非费米液体行为，类似于铁磁体 SrRuO3 的情况。另一方面，随着温度（T）升高，低频区域中的sigma(1)(omega)逐渐受到抑制，偏离1/omega(1/2)依赖性。有趣的是，我们发现在所有温度下 sigma(1)(omega) 的抑制都与 omega/T 成比例。讨论了 omega/T 标度行为与非费米液体行为的起源。
Optical conductivity spectra sigma(1)(omega) of paramagnetic CaRuO3 are investigated at various temperatures. At T=10 K, it shows a non-Fermi-liquid behavior of sigma(1)(omega)similar to1/omega(1/2), similar to the case of a ferromagnet SrRuO3. As the temperature (T) is increased, on the other hand, sigma(1)(omega) in the low-frequency region is progressively suppressed, deviating from the 1/omega(1/2) dependence. Interestingly, the suppression of sigma(1)(omega) is found to scale with omega/T at all temperatures. The origin of the omega/T scaling behavior coupled with the non-Fermi-liquid behavior is discussed.