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arXiv 1910.07571cond-mat.mes-hallcond-mat.mtrl-sci
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ZrSiS中完全带隙Dirac带的磁光探测

Magneto-optical probe of the fully gapped Dirac band in ZrSiS

E. Uykur, L. Z. Maulana, L. M. Schoop, B. V. Lotsch, M. Dressel, A. V. Pronin

摘要:

本文报道了在高达7 T的磁场$B$中对带隙半金属ZrSiS的远红外磁光研究。所观察到的场依赖的功能,这代表内(回旋共振)和带间跃迁,发展为$\sqrt{B}$在增加的领域,并可以在一个简单的二维狄拉克带模型与间隙为26毫电子伏和平均费米速度$3\times10^{5}$ m/s的一致解释。这表明这些参数沿着布里渊区中的节线的面内部分的相当窄的分布。在光谱中还检测到具有不依赖于$B$的能量位置的场诱导特征。这种功能的可能起源进行了讨论。

英文摘要:

We present a far-infrared magneto-optical study of the gapped nodal-line semimetal ZrSiS in magnetic fields $B$ up to 7 T. The observed field-dependent features, which represent intra- (cyclotron resonance) and interband transitions, develop as $\sqrt{B}$ in increasing field and can be consistently explained within a simple 2D Dirac band model with a gap of 26 meV and an averaged Fermi velocity of $3\times10^{5}$ m/s. This indicates a rather narrow distribution of these parameters along the in-plane portions of the nodal line in the Brillouin zone. A field-induced feature with an energy position that does not depend on $B$ is also detected in the spectra. Possible origins of this feature are discussed.

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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