Anomalous Defect Dependence of Thermal Conductivity in Epitaxial WO3 Thin Films

Cited 26 time in webofscience Cited 11 time in scopus
  • Hit : 601
  • Download : 0
DC FieldValueLanguage
dc.contributor.authorNing, Shuaiko
dc.contributor.authorHuberman, Samuel C.ko
dc.contributor.authorDing, Zhiweiko
dc.contributor.authorNahm, Ho‐Hyunko
dc.contributor.authorKim, Yong-Hyunko
dc.contributor.authorKim, Hyun-Sukko
dc.contributor.authorChen, Gangko
dc.contributor.authorRoss, Caroline A.ko
dc.date.accessioned2019-12-20T06:22:56Z-
dc.date.available2019-12-20T06:22:56Z-
dc.date.created2019-09-18-
dc.date.issued2019-10-
dc.identifier.citationADVANCED MATERIALS, v.31, no.43, pp.1903738-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10203/270047-
dc.description.abstractLattice defects typically reduce lattice thermal conductivity, which has been widely exploited in applications such as thermoelectric energy conversion. Here, an anomalous dependence of the lattice thermal conductivity on point defects is demonstrated in epitaxial WO3 thin films. Depending on the substrate, the lattice of epitaxial WO3 expands or contracts as protons are intercalated by electrolyte gating or oxygen vacancies are introduced by adjusting growth conditions. Surprisingly, the observed lattice volume, instead of the defect concentration, plays the dominant role in determining the thermal conductivity. In particular, the thermal conductivity increases significantly with proton intercalation, which is contrary to the expectation that point defects typically lower the lattice thermal conductivity. The thermal conductivity can be dynamically varied by a factor of approximate to 1.7 via electrolyte gating, and tuned over a larger range, from 7.8 to 1.1 W m(-1) K-1, by adjusting the oxygen pressure during film growth. The electrolyte-gating-induced changes in thermal conductivity and lattice dimensions are reversible through multiple cycles. These findings not only expand the basic understanding of thermal transport in complex oxides, but also provide a path to dynamically control the thermal conductivity.-
dc.languageEnglish-
dc.publisherWILEY-V C H VERLAG GMBH-
dc.titleAnomalous Defect Dependence of Thermal Conductivity in Epitaxial WO3 Thin Films-
dc.typeArticle-
dc.identifier.wosid000486338500001-
dc.type.rimsART-
dc.citation.volume31-
dc.citation.issue43-
dc.citation.beginningpage1903738-
dc.citation.publicationnameADVANCED MATERIALS-
dc.identifier.doi10.1002/adma.201903738-
dc.contributor.localauthorNahm, Ho‐Hyun-
dc.contributor.localauthorKim, Yong-Hyun-
dc.contributor.nonIdAuthorNing, Shuai-
dc.contributor.nonIdAuthorHuberman, Samuel C.-
dc.contributor.nonIdAuthorDing, Zhiwei-
dc.contributor.nonIdAuthorKim, Hyun-Suk-
dc.contributor.nonIdAuthorChen, Gang-
dc.contributor.nonIdAuthorRoss, Caroline A.-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthordefects-
dc.subject.keywordAuthorelectrolyte gating-
dc.subject.keywordAuthorlattice volume-
dc.subject.keywordAuthorthermal conductivity-
dc.subject.keywordAuthorWO3-
Appears in Collection
NT-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 26 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0