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arXiv 2408.03080cond-mat.supr-concond-mat.str-el
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高温超导铜氧化物光学光谱中观测到的$T_{\mathrm{c}}$与赝能隙之间的关联

Correlation between $T_{\mathrm{c}}$ and the Pseudogap Observed in the Optical Spectra of High $T_{\mathrm{c}}$ Superconducting Cuprates

Setsuko Tajima, Yuhta Itoh, Katsuya Mizutamari, Shigeki Miyasaka, Masamichi Nakajima, Nae Sasaki, Shunpei Yamaguchi, Kei-ichi Harada, Takao Watanabe

AI总结:

本文通过研究Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+z}$单晶的光学光谱,发现电导率峰能量与掺杂无关且关联于赝能隙,并揭示各类铜氧化物最佳$T_{\mathrm{c}}$与该峰能量存在明确关联。

摘要:

我们研究了最佳掺杂和欠掺杂Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+z}$单晶光学光谱的温度依赖性。与其他铜氧化物的情况类似,当温度从$T_{\mathrm{c}}$以上降低时,观测到类能隙的电导率抑制,从而在电导率谱中形成一个峰。该电导率峰的能量对掺杂水平(即$T_{\mathrm{c}}$)不敏感,这表明该能隙不是超导能隙,而是与赝能隙相关。通过比较各种单层、双层和三层铜氧化物的数据,我们发现每种材料的最佳$T_{\mathrm{c}}$与赝能隙相关的电导率峰能量之间存在明显的关联。

英文摘要:

We studied the temperature dependences of the optical spectra for optimally and underdoped Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+z}$ single crystals. Similarly to the other cuprates' cases, a gap-like conductivity suppression was observed with reducing the temperature from above $T_{\mathrm{c}}$, creating a peak in the conductivity spectrum. The conductivity peak energy was insensitive to the doping level, namely $T_{\mathrm{c}}$, which suggests that this gap is not a superconducting gap but is related to the pseudogap. Comparing the data of various mono-, double-, and triple-layer cuprates, we found a clear correlation between the optimal $T_{\mathrm{c}}$ of each material and the pseudogap-related conductivity peak energy.

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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