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太阳成集团tyc234cc:陈仙辉教授研究组与清华大学合作在PRL上发表题为Quasiparticle Interference of ...的论文

时间:2011-03-14 01:47:00 来源:合肥微尺度物质科学国家实验室|
  2011年2月22日,我室低维物理与化学研究部陈仙辉教授研究组与清华大学合作在PHYSICAL REVIEW LETTERS上发表题为Quasiparticle Interference of C-2-Symmetric Surface States in a LaOFeAs Parent Compound的论文。

Source: PHYSICAL REVIEW LETTERS Volume: 106 Issue: 8 Article Number: 087001 Published: FEB 22 2011

Zhou XD (Zhou, Xiaodong)1, Ye C (Ye, Cun)1, Cai P (Cai, Peng)1, Wang XF (Wang, Xiangfeng)2,3, Chen XH (Chen, Xianhui)2,3, Wang YY (Wang, Yayu)1
Addresses:
1. Tsinghua Univ, Lab Low Dimens Quantum Phys, Dept Phys, Beijing 100084, Peoples R China
2. Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui Peoples R China
3. Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui Peoples R China
E-mail Addresses: yayuwang@tsinghua.edu.cn

Reprint Address: Zhou, XD (reprint author), Tsinghua Univ, Lab Low Dimens Quantum Phys, Dept Phys, Beijing 100084, Peoples R China

Abstract:
We present scanning tunneling microscopy studies of the LaOFeAs parent compound of iron pnictide superconductors. High resolution spectroscopic imaging reveals strong standing wave patterns induced by quasiparticle interference of two-dimensional surface states. Fourier analysis shows that the distribution of scattering wave vectors exhibits pronounced twofold (C-2) symmetry, strongly reminiscent of the nematic electronic state found in CaFe1.94Co0.06As2. The implications of these results to the electronic structure of the pnictide parent states will be discussed.

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