ARPES探测应变碲化汞表面拓扑态
Topological surface states of strained Mercury-Telluride probed by ARPES
摘要：
利用高分辨率ARPES测量了应变碲化汞的拓扑表面态。表面态的色散形成了一个狄拉克锥，其原点靠近\ghh带的顶部：狄拉克锥的上半部分位于应力隙内，而下半部分位于重空穴带内，并一直保持线性色散到X点。还测量了所有波段的光发射电子强度的圆二色性。
英文摘要：
The topological surface states of strained HgTe have been measured using high-resolution ARPES measurements. The dispersion of surface states form a Dirac cone, which origin is close to the top of the \ghh band: the top half of the Dirac cone is inside the stress-gap while the bottom half lies within the heavy hole bands and keeps a linear dispersion all the way to the X-point. The circular dichroism of the photo-emitted electron intensity has also been measured for all the bands.
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