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Ambipolar Superconductivity with Strong Pairing Interaction in Monolayer 1T'-MoTe2.
Tang, Fangdong; Wang, Peipei; Wang, Qixing; Gan, Yuan; Lyu, Jian; Mi, Xinrun; He, Mingquan; Zhang, Liyuan; Smet, Jurgen H.
Afiliação
  • Tang F; Max Planck Institute for Solid State Research, Stuttgart 70569, Germany.
  • Wang P; Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
  • Wang Q; Max Planck Institute for Solid State Research, Stuttgart 70569, Germany.
  • Gan Y; Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
  • Lyu J; Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
  • Mi X; Low Temperature Physics Laboratory, College of Physics & Center of Quantum Materials and Devices, Chongqing University, Chongqing 401331, China.
  • He M; Low Temperature Physics Laboratory, College of Physics & Center of Quantum Materials and Devices, Chongqing University, Chongqing 401331, China.
  • Zhang L; Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
  • Smet JH; Max Planck Institute for Solid State Research, Stuttgart 70569, Germany.
Nano Lett ; 23(16): 7516-7523, 2023 Aug 23.
Article em En | MEDLINE | ID: mdl-37540083
Gate tunable two-dimensional (2D) superconductors offer significant advantages in studying superconducting phase transitions. Here, we address superconductivity in exfoliated 1T'-MoTe2 monolayers with an intrinsic band gap of ∼7.3 meV using field effect doping. Despite large differences in the dispersion of the conduction and valence bands, superconductivity can be achieved easily for both electrons and holes. The onset of superconductivity occurs near 7-8 K for both charge carrier types. This temperature is much higher than that in bulk samples. Also the in-plane upper critical field is strongly enhanced and exceeds the BCS Pauli limit in both cases. Gap information is extracted using point-contact spectroscopy. The gap ratio exceeds multiple times the value expected for BCS weak-coupling. All of these observations suggest a strong enhancement of the pairing interaction.
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Texto completo: 1 Bases de dados: MEDLINE Idioma: En Revista: Nano Lett Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Alemanha

Texto completo: 1 Bases de dados: MEDLINE Idioma: En Revista: Nano Lett Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Alemanha