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arXiv 2309.08073cond-mat.str-elcond-mat.mtrl-sci
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沙漏型节线链金属 \{eta}-ReO2 中的费米面与轻准粒子

Fermi surface and light quasi particles in hourglass nodal chain metal \b{eta}-ReO2

Daigorou Hirai, Takahito Anbai, Takako Konoike, Shinya Uji, Yuya Hattori, Taichi Terashima, Hajime Ishikawa, Koichi Kindo, Naoyuki Katayama, Tamio Oguchi, Zenji Hiroi

AI总结:

通过测量磁转矩与电阻率的量子振荡,结合第一性原理计算,证实了 \{eta}-ReO2 存在四个费米面及极小回旋质量的轻准粒子,并验证了其费米能附近的沙漏型节线链。

摘要:

通过测量磁转矩和电阻率中的量子振荡,研究了沙漏型节线链金属(狄拉克环链金属)候选材料 \{eta}-ReO2 的电子结构。在 30 mK 和高达 17.5 T 的磁场下测得的所有 de Haas-van Alphen 振荡分支,均与预测存在四个费米面(FSs)的第一性原理计算结果一致。四个 FSs 中的小电子 FS 表现出极小的回旋质量,仅为自由电子的 0.059 倍,这很可能与能带的线性色散有关。量子振荡结果与能带计算之间的一致性表明,在费米能附近存在为 \{eta}-ReO2 预测的沙漏型节线链。

英文摘要:

Quantum oscillations in magnetic torque and electrical resistivity were measured to investigate the electronic structure of \b{eta}-ReO2, a candidate hourglass nodal chain metal (Dirac loop chain metal). All the de Haas-van Alphen oscillation branches measured at 30 mK in magnetic fields of up to 17.5 T were consistent with first-principles calculations predicting four Fermi surfaces (FSs). The small-electron FS of the four FSs exhibited a very small cyclotron mass, 0.059 times that of the free electrons, which is likely to be related to the linear dispersion of the energy band. The consistency between the quantum oscillation results and band calculations indicates the presence of the hourglass nodal chain predicted for \b{eta}-ReO2 in the vicinity of the Fermi 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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