Modulation of crystal and electronic structures in topological insulators by rare-earth doping

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dc.contributor.authorYue, ZJen_AU
dc.contributor.authorZhao, WYen_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorYang, Gen_AU
dc.contributor.authorLi, Zen_AU
dc.contributor.authorWang, XLen_AU
dc.date.accessioned2024-12-12T21:00:20Zen_AU
dc.date.available2024-12-12T21:00:20Zen_AU
dc.date.issued2019-08-26en_AU
dc.date.statistics2024-07-04en_AU
dc.description.abstractWe study magnetotransport in a rare-earth-doped topological insulator, Sm0.1Sb1.9Te3 single crystals, under magnetic fields up to 14 T. It is found that that the crystals exhibit Shubnikov-de Haas (SdH) oscillations in their magnetotransport behavior at low temperatures and high magnetic fields. The SdH oscillations result from the mixed contributions of bulk and surface states. We also investigate the SdH oscillations in different orientations of the magnetic field, which reveal a three-dimensional Fermi surface topology. By fitting the oscillatory resistance with the Lifshitz-Kosevich theory, we draw a Landau-level fan diagram that displays the expected nontrivial phase. In addition, the density functional theory calculations show that Sm doping changes the crystal structure and electronic structure compared with those of pure Sb2Te3. This work demonstrates that rare-earth doping is an effective way to manipulate the Fermi surface of topological insulators. Our results hold potential for the realization of exotic topological effects in magnetic topological insulators. Copyright © 2024 American Chemical Society.en_AU
dc.identifier.citationYue, Z., Zhao, W., Cortie, D., Yang, G., Li, Z., & Wang, X. (2019). Modulation of crystal and electronic structures in topological insulators by rare-earth doping. ACS Applied Electronic Materials, 1(9), 1929-1936. doi:10.1021/acsaelm.9b00422en_AU
dc.identifier.issn2637-6113en_AU
dc.identifier.issue9en_AU
dc.identifier.journaltitleACS Applied Electronic Materialsen_AU
dc.identifier.pagination1929-1936en_AU
dc.identifier.urihttps://doi.org/10.1021/acsaelm.9b00422en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15813en_AU
dc.identifier.volume1en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectModulationen_AU
dc.subjectCrystalsen_AU
dc.subjectElectronic structureen_AU
dc.subjectRare earthsen_AU
dc.subjectCrystal dopingen_AU
dc.subjectTemperature rangeen_AU
dc.subjectMagnetic fieldsen_AU
dc.subjectTelluriumen_AU
dc.subjectAntimonyen_AU
dc.subjectSamariumen_AU
dc.titleModulation of crystal and electronic structures in topological insulators by rare-earth dopingen_AU
dc.typeJournal Articleen_AU
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