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https://doi.org/10.1007/s12274-021-3859-0

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

Mukhtar Lawan Adam1,2,5,§, Hongen Zhu1,§, Zhanfeng Liu1, Shengtao Cui1, Pengjun Zhang1, Yi Liu1, Guobin Zhang1, Xiaojun Wu2 (✉), Zhe Sun1,3,4 (✉), and Li Song1 (✉)


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1 National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei230029, China
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
3 CAS key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, China
4 CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai 200050, China
5 Physics Department, Bayero University, Kano 700231, Nigeria


Keywords: charge density wave, angle-resolved photoemission spectroscopy (ARPES), charge doping, intercalation, first-principles, single-crystals
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  • Abstract
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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 singlecrystals 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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Charge density wave phase suppression in 1T-TiSe2 through Sn intercalation. Nano Res. https://doi.org/10.1007/s12274-021-3859-0

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