Quasiparticle interference and nonsymmorphic effect on a floating band surface state of ZrSiSe

Zhen Zhu, Tay-Rong Chang, Cheng-Yi Huang, Haiyang Pan, Xiao-Ang Nie, Xin-Zhe Wang, Zhe-Ting Jin, Su-Yang Xu, Shin-Ming Huang, Dan-Dan Guan, Shiyong Wang, Yao-Yi Li, Canhua Liu, Dong Qian, Wei Ku, Fengqi Song, Hsin Lin, Hao Zheng () and Jin-Feng Jia ()
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Zhen Zhu: Shanghai Jiao Tong University
Tay-Rong Chang: National Cheng Kung University
Cheng-Yi Huang: Academia Sinica
Haiyang Pan: Nanjing University
Xiao-Ang Nie: Shanghai Jiao Tong University
Xin-Zhe Wang: Shanghai Jiao Tong University
Zhe-Ting Jin: Shanghai Jiao Tong University
Su-Yang Xu: Massachusetts Institute of Technology
Shin-Ming Huang: National Sun Yat-Sen University
Dan-Dan Guan: Shanghai Jiao Tong University
Shiyong Wang: Shanghai Jiao Tong University
Yao-Yi Li: Shanghai Jiao Tong University
Canhua Liu: Shanghai Jiao Tong University
Dong Qian: Shanghai Jiao Tong University
Wei Ku: Shanghai Jiao Tong University
Fengqi Song: Nanjing University
Hsin Lin: Academia Sinica
Hao Zheng: Shanghai Jiao Tong University
Jin-Feng Jia: Shanghai Jiao Tong University

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Non-symmorphic crystals are generating great interest as they are commonly found in quantum materials, like iron-based superconductors, heavy-fermion compounds, and topological semimetals. A new type of surface state, a floating band, was recently discovered in the nodal-line semimetal ZrSiSe, but also exists in many non-symmorphic crystals. Little is known about its physical properties. Here, we employ scanning tunneling microscopy to measure the quasiparticle interference of the floating band state on ZrSiSe (001) surface and discover rotational symmetry breaking interference, healing effect and half-missing-type anomalous Umklapp scattering. Using simulation and theoretical analysis we establish that the phenomena are characteristic properties of a floating band surface state. Moreover, we uncover that the half-missing Umklapp process is derived from the glide mirror symmetry, thus identify a non-symmorphic effect on quasiparticle interferences. Our results may pave a way towards potential new applications of nanoelectronics.

Date: 2018
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DOI: 10.1038/s41467-018-06661-9

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