Phase Transition and Superconductivity Enhancement in Se-Substituted MoTe_2 Thin Films

Li Peiling; Cui Jian; Zhou Jiadong; Guo Dong; Zhao Zhenzheng; Yi Jian; Fan Jie; Ji Zhongqing; Jing Xiunian; Qu Fanming; Yang Changli; Lu Li; Lin Junhao; Liu Zheng; Liu Guangtong

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Phase Transition and Superconductivity Enhancement in Se-Substituted MoTe_2 Thin Films

机译：硒取代的MoTe_2薄膜的相变和超导增强

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Consecutively tailoring few-layer transition metal dichalcogenides MX2 from 2H to T-d phase may realize the long-sought topological superconductivity in a single material system by incorporating superconductivity and the quantum spin Hall effect together. Here, this study demonstrates that a consecutive structural phase transition from T-d to 1T ' to 2H polytype can be realized by increasing the Se concentration in Se-substituted MoTe2 thin films. More importantly, the Se-substitution is found to dramatically enhance the superconductivity of the MoTe2 thin film, which is interpreted as the introduction of two-band superconductivity. The chemical-constituent-induced phase transition offers a new strategy to study the s(+-) superconductivity and the possible topological superconductivity, as well as to develop phase-sensitive devices based on MX2 materials.

机译：通过将超导性和量子自旋霍尔效应结合在一起，从2H到T-d相连续地定制几层过渡金属二硫化金属MX2可以在单一材料系统中实现长期寻求的拓扑超导性。在这里，这项研究表明，通过增加Se取代的MoTe2薄膜中的Se浓度，可以实现从T-d到1T'到2H的连续结构相变。更重要的是，发现Se替代可显着增强MoTe2薄膜的超导性，这被解释为引入了两波段超导性。化学成分诱导的相变为研究s（+-）超导性和可能的拓扑超导性，以及开发基于MX2材料的相敏器件提供了新的策略。

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来源
《Advanced Materials》 |2019年第48期|1904641.1-1904641.9|共9页
作者
Li Peiling; Cui Jian; Zhou Jiadong; Guo Dong; Zhao Zhenzheng; Yi Jian; Fan Jie; Ji Zhongqing; Jing Xiunian; Qu Fanming; Yang Changli; Lu Li; Lin Junhao; Liu Zheng; Liu Guangtong;
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Chinese Acad Sci Inst Phys Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Phys Sci Beijing 100049 Peoples R China;

Chinese Acad Sci Inst Phys Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China;

Nanyang Technol Univ Sch Mat Sci & Engn Singapore 639798 Singapore;

Chinese Acad Sci Ningbo Inst Ind Technol Ningbo 315201 Zhejiang Peoples R China;

Chinese Acad Sci Inst Phys Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China|Songshan Lake Mat Lab Dongguan 523808 Guangdong Peoples R China;

Chinese Acad Sci Inst Phys Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China|Songshan Lake Mat Lab Dongguan 523808 Guangdong Peoples R China|Collaborat Innovat Ctr Quantum Matter Beijing 100871 Peoples R China;

Chinese Acad Sci Inst Phys Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China|Collaborat Innovat Ctr Quantum Matter Beijing 100871 Peoples R China;

Southern Univ Sci & Technol Dept Phys Shenzhen 518055 Guangdong Peoples R China|Shenzhen Key Lab Quantum Sci & Engn Shenzhen 518055 Guangdong Peoples R China;

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原文格式 PDF
正文语种 eng
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关键词
chemical vapor deposition; MoSeTe; phase evolution; superconductivity enhancement;

机译：化学气相沉积;MoSeTe;相演化;超导增强;

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机译：MOTE_2二进制薄膜结构性能和J-V伏晶循环的研究：MOO_3-TEO_2至2H-MOTE_2的相变
2. Identification of spin-triplet superconductivity through a helical-chiral phase transition in Sr_2RuO_4 thin films [J] . S. Ikegaya, K. Yada, Y. Tanaka, Physical review . 2020,第22期

机译：通过SR_2RUO_4薄膜中的螺旋手性相转变鉴定旋转三重态超导性
3. Identification of spin-triplet superconductivity through a helical-chiral phase transition in Sr2RuO4 thin films [J] . Ikegaya S., Yada K., Tanaka Y., Physical review, B . 2020,第22期

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4. Phase-slip lines and superconductivity enhancement by microwave irradiation in thin-film type-II superconductors [C] . O. B. Agafonov, V. M. Dmitriev, I. V. Zolochevskii, Yugoslav Materials Research Society conference . 2003

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5. Superconductivity and quantum phase transitions in ultrathin amorphous lead films. [D] . Kumar, Ashwani. 2009

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6. Quasi-two-dimensional superconductivity in FeSe0.3Te0.7 thin films and electric-field modulation of superconducting transition [O] . Zhu Lin, Chenguang Mei, Linlin Wei, -1

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7. Enhanced superconductivity and superconductor to insulator transition in nano-crystalline molybdenum thin films [O] . Sharma, Shilpam, Amaladass, E. P., Sharma, Neha, 2017

机译：增强的超导性和超导体到绝缘体的转变纳米晶钼薄膜

Phase Transition and Superconductivity Enhancement in Se-Substituted MoTe_2 Thin Films

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