Phase transitions and suppression of magnetoresistance in WTe2-xSex systemShow others and affiliations
2022 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 34, no 43, article id 435403Article in journal (Refereed) Published
Abstract [en]
X-ray diffraction, Raman spectroscopy, and electrical resistivity measurements on polycrystalline WTe2-xSex (0 <= x <= 0.8) reveal a T-d - 1T structural phase transition and suppression of magnetoresistance at x = 0.2. These phenomena are consistent with the pressure phase diagram of WTe2. However, chemical pressure due to substitution of smaller Se ion cannot generate pressure required for the phase transition. Strain induced by sample inhomogeneity is believed to be a trigger to the behaviors. In agreement with previous predictions and reports, a mixed phase of 1T and 2H structures was also detected in Se-rich samples. Coincidentally at x = 0.2, electrical resistivity analysis suggests a phase transition from a metallic phase to a nonmetallic phase that is possibly a topological-insulating phase.
Place, publisher, year, edition, pages
IOP Publishing Ltd , 2022. Vol. 34, no 43, article id 435403
Keywords [en]
magnetoresistance; phase transition; tungsten ditelluride
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-188412DOI: 10.1088/1361-648X/ac8b53ISI: 000847565900001PubMedID: 35985303OAI: oai:DiVA.org:liu-188412DiVA, id: diva2:1695011
Note
Funding Agencies|Research Fund for DPST Graduate with First Placement [003/2015]; Institute for the Promotion of Teaching Science and Technology (IPST), Thailand; Ratchadaphiseksomphot Endowment Fund Part of the Research Grant for New Scholar CU Researchers Project [RGN-2559-048-16-23]; Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation: Research Grant for New Scholar (RGNS) [RGNS 63-013]; Grants for Development of New Faculty Staff, Ratchadaphiseksomphot Fund, Chulalongkorn University; NSRF via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B05F640051]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Swedish Foundation for Strategic Research through the Future Research Leaders 6 program [FFL 15-0290]; Swedish Research Council (VR) [201905403]; Knut and Alice Wallenberg Foundation, Sweden (Wallenberg Scholar Grant) [KAW-2018.0194]; Swedish Research Council [2018-05973]; National Research Council of Thailand (NRCT) [NRCT5-RSA63001-04]
2022-09-122022-09-122022-09-12