论文标题
超导性和费米表面嵌套在候选狄拉克半学NBC中
Superconductivity and Fermi Surface Nesting in the Candidate Dirac Semimetal NbC
论文作者
论文摘要
我们报告了具有各种异常特性的单晶NBC的合成。传输，磁化率和特定的热量测量结果表明，NBC是一种传统的超导体，具有11.5 K的超导过渡温度（$ T_C $）。我们的理论计算表明，NBC是II型dirac semimetal，具有强大的FERMI表面嵌套，我们的Arpes测量结果得到了支持。我们还使用角度分辨光发射光谱（ARPE）观察到了NBC的超导间隙，并发现了一些非常规的行为。这些有趣的超导和拓扑特性结合了高腐蚀性，使NBC成为基础研究和设备应用的理想平台。
We report the synthesis of single-crystal NbC, a transition metal carbide with various unusual properties. Transport, magnetic susceptibility, and specific heat measurements demonstrate that NbC is a conventional superconductor with a superconducting transition temperature ($T_c$) of 11.5 K. Our theoretical calculations show that NbC is a type-II Dirac semimetal with strong Fermi surface nesting, which is supported by our ARPES measurement results. We also observed the superconducting gaps of NbC using angle-resolved photoemission spectroscopy (ARPES) and found some unconventional behaviors. These intriguing superconducting and topological properties, combined with the high corrosion resistance, make NbC an ideal platform for both fundamental research and device applications.
