Tungsten Ditelluride: a layered semimetal.
Identifieur interne : 000059 ( Main/Exploration ); précédent : 000058; suivant : 000060Tungsten Ditelluride: a layered semimetal.
Auteurs : Chia-Hui Lee [États-Unis] ; Eduardo Cruz Silva [États-Unis] ; Lazaro Calderin [États-Unis] ; Minh An T. Nguyen [États-Unis] ; Matthew J. Hollander [États-Unis] ; Brian Bersch [États-Unis] ; Thomas E. Mallouk [États-Unis] ; Joshua A. Robinson [États-Unis]Source :
- Scientific reports [ 2045-2322 ] ; 2015.
Abstract
Tungsten ditelluride (WTe2) is a transition metal dichalcogenide (TMD) with physical and electronic properties that make it attractive for a variety of electronic applications. Although WTe2 has been studied for decades, its structure and electronic properties have only recently been correctly described. We experimentally and theoretically investigate the structure, dynamics and electronic properties of WTe2, and verify that WTe2 has its minimum energy configuration in a distorted 1T structure (Td structure), which results in metallic-like transport. Our findings unambiguously confirm the metallic nature of WTe2, introduce new information about the Raman modes of Td-WTe2, and demonstrate that Td-WTe2 is readily oxidized via environmental exposure. Finally, these findings confirm that, in its thermodynamically favored Td form, the utilization of WTe2 in electronic device architectures such as field effect transistors may need to be reevaluated.
DOI: 10.1038/srep10013
PubMed: 26066766
Affiliations:
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Nguyen</name><affiliation wicri:level="4"><nlm:affiliation>Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Hollander, Matthew J" sort="Hollander, Matthew J" uniqKey="Hollander M" first="Matthew J" last="Hollander">Matthew J. 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Mallouk</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Robinson, Joshua A" sort="Robinson, Joshua A" uniqKey="Robinson J" first="Joshua A" last="Robinson">Joshua A. Robinson</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement 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uniqKey="Lee C" first="Chia-Hui" last="Lee">Chia-Hui Lee</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Silva, Eduardo Cruz" sort="Silva, Eduardo Cruz" uniqKey="Silva E" first="Eduardo Cruz" last="Silva">Eduardo Cruz Silva</name><affiliation wicri:level="4"><nlm:affiliation>1] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Calderin, Lazaro" sort="Calderin, Lazaro" uniqKey="Calderin L" first="Lazaro" last="Calderin">Lazaro Calderin</name><affiliation wicri:level="4"><nlm:affiliation>1] Materials Research Institute, The Pennsylvania State University, University Park, United States [2] Research Computing and Cyberinfrastructure, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Materials Research Institute, The Pennsylvania State University, University Park, United States [2] Research Computing and Cyberinfrastructure, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Nguyen, Minh An T" sort="Nguyen, Minh An T" uniqKey="Nguyen M" first="Minh An T" last="Nguyen">Minh An T. Nguyen</name><affiliation wicri:level="4"><nlm:affiliation>Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Hollander, Matthew J" sort="Hollander, Matthew J" uniqKey="Hollander M" first="Matthew J" last="Hollander">Matthew J. Hollander</name><affiliation wicri:level="1"><nlm:affiliation>Department of Electrical Engineering, The Pennsylvania University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Electrical Engineering, The Pennsylvania University, University Park, Pennsylvania 16802</wicri:regionArea><wicri:noRegion>Pennsylvania 16802</wicri:noRegion></affiliation></author><author><name sortKey="Bersch, Brian" sort="Bersch, Brian" uniqKey="Bersch B" first="Brian" last="Bersch">Brian Bersch</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Mallouk, Thomas E" sort="Mallouk, Thomas E" uniqKey="Mallouk T" first="Thomas E" last="Mallouk">Thomas E. Mallouk</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Department of Chemistry, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Robinson, Joshua A" sort="Robinson, Joshua A" uniqKey="Robinson J" first="Joshua A" last="Robinson">Joshua A. Robinson</name><affiliation wicri:level="4"><nlm:affiliation>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park, United States.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>1] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [2] Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States [3] Materials Research Institute, The Pennsylvania State University, University Park</wicri:regionArea><orgName type="university">Université d'État de Pennsylvanie</orgName><placeName><settlement type="city">University Park (Pennsylvanie)</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author></analytic><series><title level="j">Scientific reports</title><idno type="eISSN">2045-2322</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Tungsten ditelluride (WTe2) is a transition metal dichalcogenide (TMD) with physical and electronic properties that make it attractive for a variety of electronic applications. Although WTe2 has been studied for decades, its structure and electronic properties have only recently been correctly described. We experimentally and theoretically investigate the structure, dynamics and electronic properties of WTe2, and verify that WTe2 has its minimum energy configuration in a distorted 1T structure (Td structure), which results in metallic-like transport. Our findings unambiguously confirm the metallic nature of WTe2, introduce new information about the Raman modes of Td-WTe2, and demonstrate that Td-WTe2 is readily oxidized via environmental exposure. Finally, these findings confirm that, in its thermodynamically favored Td form, the utilization of WTe2 in electronic device architectures such as field effect transistors may need to be reevaluated.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Pennsylvanie</li></region><settlement><li>University Park (Pennsylvanie)</li></settlement><orgName><li>Université d'État de Pennsylvanie</li></orgName></list><tree><country name="États-Unis"><region name="Pennsylvanie"><name sortKey="Lee, Chia Hui" sort="Lee, Chia Hui" uniqKey="Lee C" first="Chia-Hui" last="Lee">Chia-Hui Lee</name></region><name sortKey="Bersch, Brian" sort="Bersch, Brian" uniqKey="Bersch B" first="Brian" last="Bersch">Brian Bersch</name><name sortKey="Calderin, Lazaro" sort="Calderin, Lazaro" uniqKey="Calderin L" first="Lazaro" last="Calderin">Lazaro Calderin</name><name sortKey="Hollander, Matthew J" sort="Hollander, Matthew J" uniqKey="Hollander M" first="Matthew J" last="Hollander">Matthew J. Hollander</name><name sortKey="Mallouk, Thomas E" sort="Mallouk, Thomas E" uniqKey="Mallouk T" first="Thomas E" last="Mallouk">Thomas E. Mallouk</name><name sortKey="Nguyen, Minh An T" sort="Nguyen, Minh An T" uniqKey="Nguyen M" first="Minh An T" last="Nguyen">Minh An T. Nguyen</name><name sortKey="Robinson, Joshua A" sort="Robinson, Joshua A" uniqKey="Robinson J" first="Joshua A" last="Robinson">Joshua A. Robinson</name><name sortKey="Silva, Eduardo Cruz" sort="Silva, Eduardo Cruz" uniqKey="Silva E" first="Eduardo Cruz" last="Silva">Eduardo Cruz Silva</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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