Dimensionality-driven orthorhombic MoTe2 at room temperature
We use a combination of Raman spectroscopy and transport measurements to study thin flakes of the type-II Weyl semimetal candidate MoTe2 protected from oxidation. In contrast to bulk crystals, which undergo a phase transition from monoclinic to the inversion symmetry breaking, orthorhombic phase bel...
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| Veröffentlicht in: | Physical review. B 2018-01, Vol.97 (4) |
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| container_title | Physical review. B |
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| creator | He, Rui Zhong, Shazhou Kim, Hyun Ho Ye, Gaihua Ye, Zhipeng Winford, Logan McHaffie, Daniel Rilak, Ivana Chen, Fangchu Luo, Xuan Sun, Yuping Tsen, Adam W |
| description | We use a combination of Raman spectroscopy and transport measurements to study thin flakes of the type-II Weyl semimetal candidate MoTe2 protected from oxidation. In contrast to bulk crystals, which undergo a phase transition from monoclinic to the inversion symmetry breaking, orthorhombic phase below ∼250K, we find that in moderately thin samples below ∼12nm, a single orthorhombic phase exists up to and beyond room temperature. This could be due to the effect of c-axis confinement, which lowers the energy of an out-of-plane hole band and stabilizes the orthorhombic structure. Our results suggest that Weyl nodes, predicated upon inversion symmetry breaking, may be observed in thin MoTe2 at room temperature. |
| doi_str_mv | 10.1103/PhysRevB.97.041410 |
| format | Article |
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Our results suggest that Weyl nodes, predicated upon inversion symmetry breaking, may be observed in thin MoTe2 at room temperature.</description><subject>Broken symmetry</subject><subject>Diffraction</subject><subject>Molybdenum compounds</subject><subject>Orthorhombic phase</subject><subject>Oxidation</subject><subject>Phase transitions</subject><subject>Raman spectroscopy</subject><subject>Room temperature</subject><subject>Tellurides</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNo9jkFLwzAYQIMoOOb-gKeC59bvS9K0AS86nQoTReZ5pOlX2rE2NUkH-_cOFE_vnR6PsWuEDBHE7Ud7DJ90eMh0kYFEiXDGZlwqnWqt9Pm_53DJFiHsAAAV6AL0jN09dj0NoXOD2XfxmNa-O9CQOB9b51vXV51N3tyGeGJi4p3rk0j9SN7EydMVu2jMPtDij3P2tXraLF_S9fvz6_J-nY6IIqaa55WSVOq8KU6_jSlyRBKosVZNnltJujZ1ZYRBKy0Vla0ArAUua16WBYg5u_ntjt59TxTiducmfzoOW45coCp1KcUPaZFMxA</recordid><startdate>20180118</startdate><enddate>20180118</enddate><creator>He, Rui</creator><creator>Zhong, Shazhou</creator><creator>Kim, Hyun Ho</creator><creator>Ye, Gaihua</creator><creator>Ye, Zhipeng</creator><creator>Winford, Logan</creator><creator>McHaffie, Daniel</creator><creator>Rilak, Ivana</creator><creator>Chen, Fangchu</creator><creator>Luo, Xuan</creator><creator>Sun, Yuping</creator><creator>Tsen, Adam W</creator><general>American Physical Society</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20180118</creationdate><title>Dimensionality-driven orthorhombic MoTe2 at room temperature</title><author>He, Rui ; Zhong, Shazhou ; Kim, Hyun Ho ; Ye, Gaihua ; Ye, Zhipeng ; Winford, Logan ; McHaffie, Daniel ; Rilak, Ivana ; Chen, Fangchu ; Luo, Xuan ; Sun, Yuping ; Tsen, Adam W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p113t-925b64e895f7103fa7511e3191d6f55c4e9dadba3a1c4ce7bcb00cc024d288703</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Broken symmetry</topic><topic>Diffraction</topic><topic>Molybdenum compounds</topic><topic>Orthorhombic phase</topic><topic>Oxidation</topic><topic>Phase transitions</topic><topic>Raman spectroscopy</topic><topic>Room temperature</topic><topic>Tellurides</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>He, Rui</creatorcontrib><creatorcontrib>Zhong, Shazhou</creatorcontrib><creatorcontrib>Kim, Hyun Ho</creatorcontrib><creatorcontrib>Ye, Gaihua</creatorcontrib><creatorcontrib>Ye, Zhipeng</creatorcontrib><creatorcontrib>Winford, Logan</creatorcontrib><creatorcontrib>McHaffie, Daniel</creatorcontrib><creatorcontrib>Rilak, Ivana</creatorcontrib><creatorcontrib>Chen, Fangchu</creatorcontrib><creatorcontrib>Luo, Xuan</creatorcontrib><creatorcontrib>Sun, Yuping</creatorcontrib><creatorcontrib>Tsen, Adam W</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review. 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| subjects | Broken symmetry Diffraction Molybdenum compounds Orthorhombic phase Oxidation Phase transitions Raman spectroscopy Room temperature Tellurides |
| title | Dimensionality-driven orthorhombic MoTe2 at room temperature |
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