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- W3200313172 abstract "Investigating Shubnikov-de Haas (SdH) oscillations in high magnetic fields, we experimentally infer the electronic band structure of the quasi-two-dimensional electron gas (2DEG) at the ionic-liquid gated amorphous ($a$)-${mathrm{LaAlO}}_{3}/{mathrm{KTaO}}_{3}$ interface. The angular dependence of SdH oscillations indicates a 2D confinement of a majority of electrons at the interface. However, additional SdH oscillations with an angle-independent frequency observed at high tilt angles indicate the coexistence of 3D charge carriers extending deep into the ${mathrm{KTaO}}_{3}$. The SdH oscillations measured in magnetic fields perpendicular to the interface show four frequencies corresponding to four 2D subbands with different effective masses ($0.20phantom{rule{0.16em}{0ex}}{m}_{e}ensuremath{-}0.55phantom{rule{0.16em}{0ex}}{m}_{e}$). The single-frequency oscillations originating from 3D electrons yields a larger effective mass of $ensuremath{sim}0.70phantom{rule{0.16em}{0ex}}{m}_{e}$. Overall, the inferred subbands are in good agreement with the theoretical calculations and angle-resolved photoemission spectroscopy studies on 2DEG at ${mathrm{KTaO}}_{3}$ surface." @default.
- W3200313172 created "2021-09-27" @default.
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- W3200313172 date "2021-09-10" @default.
- W3200313172 modified "2023-09-30" @default.
- W3200313172 title "Electronic subbands in the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>a</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>LaAlO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>KTaO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> interface revealed by quantum oscillations in high magnetic fields" @default.
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- W3200313172 doi "https://doi.org/10.1103/physrevresearch.3.033234" @default.
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