学术

物理学系卢海舟学术报告的通知(Physics Department Colloquium)

编辑:江丹 来源:物理学系 时间:2019年03月11日 访问次数:290  源地址

题目:3D Quantum Hall effect

报告人:卢海舟Hai-Zhou Lu

          Southern University of Science and Technology of China

地点: 教十二-201

时间: 315日,周五,15:00-17:00

 

Abstract

The discoveries of the quantum Hall effect have led to three Nobel prizes and the booming field of topological states of quantum matter. So far, the quantum Hall effect is observed only in 2D systems. We show that the Fermi arcs can give rise to a distinctive quantum Hall effect in topological semimetals in three dimensions [1]. Topological semimetals are 3D topological states of matter, in which the energy bands touch at a finite number of Weyl nodes. They host topologically-protected surface states, known as the Fermi arcs. Via a “wormhole” tunnelling assisted by the Weyl nodes, the Fermi arcs at two opposite surfaces can form a single 2D electron gas and support a quantum Hall effect in three dimensions. Possible signatures of the 3D quantum Hall effect have been observed in several experiments on the topological Dirac semimetal Cd3As2 [2-5]. Our discovery of this 3D quantum Hall give an example of (d-2)-dimensional boundary states, a promising direction in topological states of quantum matter.

 

References:

[1] C. M. Wang, Hai-Peng Sun, Hai-Zhou Lu*, and X. C. Xie, Phys. Rev. Lett. 119, 136806 (2017).

[2] C. Zhang, F. X. Xiu, et al., Nature Comm. 8, 1272 (2017); Nature 565, 331 (2019).

[3] Uchida, et al., Nature Comm. 8, 2274 (2017).

[4] Schumann, Stemmer, et al., Phys. Rev. Lett. 120, 016801 (2018).

[5] Lin, Z. M. Liao, et al., Phys. Rev. Lett. 112, 036602 (2019)].

 

Short Biography

Haizhou Lu obtained his Ph.D. in Physics from Institute for Advanced Study, Tsinghua University, Beijing, in 2007. From 2007 to 2015, he was a Postdoc and then Research Assistant Professor at the University of Hong Kong. He is now a Professor of physics at Southern University of Science and Technology, Shenzhen. His research is on the quantum transport in topological states of matter. He has published over 70 articles in physics journals, including 13 in PRL, 1 in Nature Physics, 4 in Nature Communications, 2 in Nature, with a citation over 3000 and h-index of 28.

欢迎老师和同学参加!


总访问量:10743231
  • 人民网舆情监测室发布首份《京津冀“互联网+政务”发展研究报告》 2019-05-26
  • 回复@艾鸣1:你看强坛除了小寻子这种跟你一样老蚕的人之外,有人会有人敢支持你么? 2019-05-26
  • 指尖触碰 你我结缘丨浙江新闻4周年 我们再出发 2019-05-25
  • 中共山西省委组织部公示 2019-05-25
  • 违法和不良信息举报受理和处置管理办法 2019-05-24
  • Lorgane législatif national adopte la loi sur la supervision 2019-05-24
  • 车迹·东风柳汽御风前行 自主解困样本 2019-05-23
  • 哪个不在痛打落水狗呢 2019-05-22
  • 拉萨市城关区旅游市场表现活跃 2019-05-21
  • 援疆专机为新疆旅游旺季“添柴加薪” 2019-05-21
  • 看饿了,和 Kinfolk 同逼格的 10 本美食杂志 2019-05-20
  • 为山西公安“一网通一次办”点赞 2019-05-20
  • 这个帖子,本人已经驳斥多次了。共产主义不是不能实行按劳分配,而是不需要实行按劳分配。共产主义时代,产品极大丰富,所以实行按劳分配是多余的,好比脱裤子放屁!... 2019-05-19
  • 社交短视频:“抖”起来 沉下去 2019-05-19
  • 全国实施通关新举措 中国公民排队不超10分钟 2019-05-18
  • 714| 920| 332| 214| 796| 329| 22| 797| 261| 868|