Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2
Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2
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DOI：
10.1103/physrevb.97.045109
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发表时间：
2018-01-10
影响因子：
3.7
通讯作者：
Analytis, James G.
中科院分区：
文献类型：
--
作者：
Kealhofer, Robert;Jang, Sooyoung;Analytis, James G.
我们提出的晶体结构，电子结构，和输运性质的材料YbMnSb 2，一个候选系统的狄拉克物理的调查中存在的磁秩序。我们的测量结果表明，该系统是一个低载流子密度的半金属与二维费米表面所产生的狄拉克色散，符合密度泛函理论计算的反铁磁系统的预测。低温电阻率非常大，这表明该系统中的散射在耗散动量方面是非常有效的，尽管它具有类似狄拉克的性质。
We present the crystal structure, electronic structure, and transport properties of the material YbMnSb2, a candidate system for the investigation of Dirac physics in the presence of magnetic order. Our measurements reveal that this system is a low-carrier-density semimetal with a two-dimensional Fermi surface arising from a Dirac dispersion, consistent with the predictions of density-functional-theory calculations of the antiferromagnetic system. The low temperature resistivity is very large, suggesting that scattering in this system is highly efficient at dissipating momentum despite its Dirac-like nature.