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Anisotropic transport of two-dimensional electron gas modulated by embedded elongated GaSb/GaAs quantum dots
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10.1063/1.3541882
/content/aip/journal/apl/98/3/10.1063/1.3541882
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/3/10.1063/1.3541882
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic cross-sectional structure of the QD sample S1, (b) AFM image of top grown GaSb QDs, (c) histogram of the lateral size S, and (d) histogram of the asymmetry of the GaSb QDs. The red dashed lines in [(c) and (d)] show the corresponding Gaussian fits.

Image of FIG. 2.
FIG. 2.

(a) 2DEG concentration of the two Hall bars of sample S1 as a function of gate voltage measured at 4.2 K, the inset shows the schematic graph of Hall bars in two directions. (b) dependence of measured electron Hall mobilities and of both QD sample S1 and reference sample S2. (c) Experimental dots-originated anisotropic mobilities as functions of .

Image of FIG. 3.
FIG. 3.

Calculated anisotropic mobility ratio as a function of for different values of the length L and the width W of the GaSb QDs. The squares denote the experimental ratio . The inset shows the schematic shape of the elongated GaSb QDs in the Cartesian coordinate system.

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/content/aip/journal/apl/98/3/10.1063/1.3541882
2011-01-19
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Anisotropic transport of two-dimensional electron gas modulated by embedded elongated GaSb/GaAs quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/3/10.1063/1.3541882
10.1063/1.3541882
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