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• W3201236416 abstract "This study investigated the electronic structure of SrTi$_{1-x}$V$_x$O$_3$ (STVO) thin films, which are solid solutions of strongly correlated transparent conductive oxide (TCO) SrVO$_3$ and oxide semiconductor SrTiO$_3$, using ${in situ}$ photoemission spectroscopy. STVO is one of the most promising candidates for correlated-metal TCO because it has the capability of optimizing the performance of transparent electrodes by varying ${x}$. Systematic and significant spectral changes were found near the Fermi level (${E_{rm F}}$) as a function of ${x}$, while the overall electronic structure of STVO is in good agreement with the prediction of band structure calculations. As ${x}$ decreases from 1.0, spectral weight transfer occurs from the coherent band near ${E_{rm F}}$ to the incoherent states (lower Hubbard band) around 1.0-1.5 eV. Simultaneously, a pseudogap is formed at ${E_{rm F}}$, indicating a significant reduction in quasiparticle spectral weight within close vicinity of ${E_{rm F}}$. This pseudogap seems to evolve into an energy gap at ${x}$ = 0.4, suggesting the occurrence of a composition-driven metal-insulator transition. From angle-resolved photoemission spectroscopic results, the carrier concentration ${n}$ changes proportionally as a function of ${x}$ in the metallic range of ${x}$ = 0.6-1.0. In contrast, the mass enhancement factor, which is proportional to the effective mass (${m^*}$), does not change significantly with varying ${x}$. These results suggest that the key factor of ${n/m^*}$ in optimizing the performance of correlated-metal TCO is tuned by ${x}$, highlighting the potential of STVO to achieve the desired TCO performance in the metallic region." @default.
• W3201236416 created "2021-09-27" @default.
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• W3201236416 date "2021-09-10" @default.
• W3201236416 modified "2023-10-15" @default.
• W3201236416 title "Electronic structure of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>Sr</mml:mi><mml:msub><mml:mi>Ti</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mtext>−</mml:mtext><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant=normal>V</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> films studied by <i>in situ</i> photoemission spectroscopy: Screening for a transparent …" @default.
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• W3201236416 doi "https://doi.org/10.1103/physrevb.104.115121" @default.
• W3201236416 hasPublicationYear "2021" @default.
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