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Multiple conducting carriers generated in heterostructures
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Sheet resistance of LAO (125 unit cells) films on STO substrates. Inset: photographs of as-grown and postannealed LAO/STO samples on mesh paper. (b) Room temperature of LAO films on STO, [LTO/LAO] superlattices on STO, a STO film on STO, and a bare STO substrate.

Image of FIG. 2.
FIG. 2.

Simulated of a LAO (50 nm) thin film ona STO substrate. (The experimental data of the LAO/STO sample is also shown for comparison.) (a) Simulated spectra with from to at and (Ref. 15). Green lines are calculated spectra for from to . (b) Simulated spectra with various mobility values at . Transmittance measurement at very low photon energy meV (shaded region) is practically hindered by the Restrahlen band of infrared-active phonons of the STO substrate.

Image of FIG. 3.
FIG. 3.

(a) Temperature-dependent of LAO/STO and their model-fit curves at each temperature. The arrows point the weak absorption bands showing a blue-shift. (b) The mobility as a function of temperature extracted from dc-resistivity and Hall measurements as well as optical transmission spectroscopy. Inset shows as a function of temperature.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures