@article{146968afe2f947128f2adf5d3c7de29c,
title = "Field-free platform for Majorana-like zero mode in superconductors with a topological surface state",
abstract = "Superconducting materials exhibiting topological properties are emerging as an exciting platform to realize fundamentally new excitations from topological quantum states of matter. In this letter, we explore the possibility of a field-free platform for generating Majorana zero energy excitations by depositing magnetic Fe impurities on the surface of candidate topological superconductors, LiFeAs and PbTaSe2. We use scanning tunneling microscopy to probe localized states induced at the Fe adatoms on the atomic scale and at sub-Kelvin temperatures. We find that each Fe adatom generates a striking zero-energy bound state inside the superconducting gap, which do not split in magnetic fields up to 8 T, underlining a nontrivial topological origin. Our findings point to magnetic Fe adatoms evaporated on bulk superconductors with topological surface states for exploring Majorana zero modes and quantum information science under field-free conditions.",
author = "Zhang, {Songtian S.} and Yin, {Jia Xin} and Guangyang Dai and Lingxiao Zhao and Chang, {Tay Rong} and Nana Shumiya and Kun Jiang and Hao Zheng and Guang Bian and Daniel Multer and Maksim Litskevich and Guoqing Chang and Ilya Belopolski and Cochran, {Tyler A.} and Xianxin Wu and Desheng Wu and Jianlin Luo and Genfu Chen and Hsin Lin and Chou, {Fang Cheng} and Xiancheng Wang and Changqing Jin and Raman Sankar and Ziqiang Wang and Hasan, {M. Zahid}",
note = "Funding Information: Experimental and theoretical work at Princeton University was supported by the Gordon and Betty Moore Foundation (Grant No. GBMF4547/Hasan). The characterization of the sample was supported by the US Department of Energy (US DOE) under the Basic Energy Sciences program (Grant No. DOS/BES DE-FG-02-05ER46200). Z.W and K.J. acknowledge US DOE Grant No. DE-FG02-99ER45747. G.B. is supported by the US National Science Foundation 238 (Grant No. NSF-DMR-0054904). H.L. acknowledges the support by the Ministry of Science and Technology (MOST) in Taiwan under Grant No. MOST109-2112-M-001-014-MY3. T.-R.C. was supported by the Young Scholar Fellowship Program from the Ministry of Science and Technology (MOST) in Taiwan, under a MOST grant for the Columbus Program No. MOST109-2636-M-006-002, National Cheng Kung University, Taiwan, and National Center for Theoretical Sciences, Taiwan. This work was supported partially by the MOST, Taiwan, Grant No. MOST107-2627-E-006-001. J.L. acknowledges support from the National Science Foundation of China (Grants No. 11674375 and No. 11634015) and the National Basic Research Program of China (Grants No. 2015CB921300 and No. 2017YFA0302901). M.Z.H. acknowledges support from Lawrence Berkeley National Laboratory and the Miller Institute of Basic Research in Science at the University of California, Berkeley in the form of a Visiting Miller Professorship. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = mar,
day = "1",
doi = "10.1103/PhysRevB.101.100507",
language = "English (US)",
volume = "101",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "10",
}