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• W2959585068 abstract "Using angle resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations we studied the low-energy electronic structure of bulk ZrTe$_2$. ARPES studies on ZrTe$_2$ demonstrate free charge carriers at the Fermi level, which is further confirmed by the DFT calculations. An equal number of hole and electron carrier density estimated from the ARPES data, points ZrTe$_2$ to a semimetal. The DFT calculations further suggest a band inversion between Te $p$ and Zr $d$ states at the $Gamma$ point, hinting at the non-trivial band topology in ZrTe$_2$. Thus, our studies for the first time unambiguously demonstrate that ZrTe$_2$ is a topological semimetal. Also, a comparative band structure study is done on ZrSe$_2$ which shows a semiconducting nature of the electronic structure with an indirect band gap of 0.9 eV between $Gamma (A) $ and $M (L)$ high symmetry points. In the below we show that the metal-chalcogen bond-length plays a critical role in the electronic phase transition from semiconductor to a topological semimetal ingoing from ZrSe$_2$ to ZrTe$_2$." @default.
• W2959585068 created "2019-07-23" @default.
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• W2959585068 date "2020-04-20" @default.
• W2959585068 modified "2023-10-03" @default.
• W2959585068 title "Metal-chalcogen bond-length induced electronic phase transition from semiconductor to topological semimetal in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>Zr</mml:mi><mml:msub><mml:mi>X</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mi>Se</mml:mi></mml:math> and Te)" @default.
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• W2959585068 doi "https://doi.org/10.1103/physrevb.101.165122" @default.
• W2959585068 hasPublicationYear "2020" @default.
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