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Persistence of Monoclinic Crystal Structure in 3D Second-Order Topological Insulator Candidate 1T'-MoTe₂ Thin Flake Without Structural Phase Transition.

ABSTRACT: A van der Waals material, MoTe₂ with a monoclinic 1T' crystal structure is a candidate for 3D second-order topological insulators (SOTIs) hosting gapless hinge states and insulating surface states. However, due to the temperature-induced structural phase transition, the monoclinic 1T' structure of MoTe₂ is transformed into the orthorhombic T_d structure as the temperature is lowered, which hinders the experimental verification and electronic applications of the predicted SOTI state at low temperatures. Here, systematic Raman spectroscopy studies of the exfoliated MoTe₂ thin flakes with variable thicknesses at different temperatures, are presented. As a spectroscopic signature of the orthorhombic T_d structure of MoTe₂ , the ou

SUBMITTER: Su B

PROVIDER: S-EPMC8844473 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature

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Persistence of Monoclinic Crystal Structure in 3D Second-Order Topological Insulator Candidate 1T'-MoTe₂ Thin Flake Without Structural Phase Transition.

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Persistence of Monoclinic Crystal Structure in 3D Second-Order Topological Insulator Candidate 1T'-MoTe2 Thin Flake Without Structural Phase Transition.

OmicsDI is part of the ELIXIR infrastructure

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Persistence of Monoclinic Crystal Structure in 3D Second-Order Topological Insulator Candidate 1T'-MoTe₂ Thin Flake Without Structural Phase Transition.