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Charge density wave phase suppression in 1T-TiSe2 through Sn intercalation

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Abstract

Taking advantage of the unique layered structure of TiSe2, the intrinsic electronic properties of two-dimensional materials can easily be tuned via heteroatomic engineering. Herein, we show that the charge density wave (CDW) phase in 1T-TiSe2 single-crystals can be gradually suppressed through Sn atoms intercalation. Using angle-resolved photoemission spectroscopy (ARPES) and temperature-dependent resistivity measurements, this work reveals that Sn atoms can induce charge doping and modulate the intrinsic electronic properties in the host 1T-TiSe2. Notably, our temperature-dependent ARPES results highlight the role exciton-phonon interaction and the Jahn-Teller mechanism through the formation of backfolded bands and exhibition of a downward Se shift of 4p valence band in the formation of CDW in this material.

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Acknowledgements

The authors acknowledge the financial support from the National Key R&D Program of China (Nos. 2020YFA0405800 and 2017YFA0303500), the National Natural Science Foundation of China (NSFC) (Nos. U1932201, and 21727801), the International Partnership Program of The Chinese Academy of Sciences (CAS) (No. 211134KYSB20190063), the CAS Collaborative Innovation Program of Hefei Science Center (No. 2019HSC-CIP002), and the University Synergy Innovation Program of Anhui Province (No. GXXT-2020-002). We thank the USTC supercomputer center (USTC SCC). We acknowledge the support and usage of supercomputing platform of the National Synchrotron Radiation Lab, Hefei and also the ARPES endstation at the NSRL. M. L. A. acknowledges the Chinese Scholarship Council Program.

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  1. Mukhtar Lawan Adam and Hongen Zhu contributed equally to this work.

Authors and Affiliations

  1. National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230029, China

    Mukhtar Lawan Adam, Hongen Zhu, Zhanfeng Liu, Shengtao Cui, Pengjun Zhang, Yi Liu, Guobin Zhang, Zhe Sun & Li Song

  2. Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Synergetic Innovation of Quantum Information & Quantum Technology, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China

    Mukhtar Lawan Adam & Xiaojun Wu

  3. CAS key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, 230026, China

    Zhe Sun

  4. CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai, 200050, China

    Zhe Sun

  5. Physics Department, Bayero University, Kano, 700231, Nigeria

    Mukhtar Lawan Adam

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  1. Mukhtar Lawan Adam
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Correspondence to Xiaojun Wu, Zhe Sun or Li Song.

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Adam, M.L., Zhu, H., Liu, Z. et al. Charge density wave phase suppression in 1T-TiSe2 through Sn intercalation. Nano Res. 15, 2643–2649 (2022). https://doi.org/10.1007/s12274-021-3859-0

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