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Electronic structure of cleaved InAsP/InP(001) quantum dots measured by scanning tunneling spectroscopy
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10.1063/1.3504257
/content/aip/journal/apl/97/17/10.1063/1.3504257
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/17/10.1063/1.3504257
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

STS measurements obtained at on bare InP(110) surface (a), on an InAsP QD exhibiting steplike features (b), and on an InAsP QD exhibiting discrete peaks at the center (c) and 4 nm apart along the QD base (d). These spectra [(c) and (d)] show that the spectral weight of each discrete energy levels is spatially resolved. Each curve is vertically shifted for clarity. Inset: Schematic density of states for a quantum well and a QD.

Image of FIG. 2.
FIG. 2.

InAsP/InP(001) QD derivative image (a) and differential conductivity map [(b)–(f)] measured, respectively, at 0.884 V, 0.931 V, 1.012 V, 1.072 V, and 1.125 V. Each picture has its own arbitrary color scale.

Image of FIG. 3.
FIG. 3.

STM topographical [(a)–(c)] and derivative images [(b)–(d)] of InAsP QDs cleaved either along the [(a) and (b)] or along the (110) [(c) and (d)] cleavage plane.

Image of FIG. 4.
FIG. 4.

InAsP QD topographical image (a), profile corresponding to the dashed line (b) and schematic cleaved InAsP QD (c).

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/content/aip/journal/apl/97/17/10.1063/1.3504257
2010-10-25
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electronic structure of cleaved InAsP/InP(001) quantum dots measured by scanning tunneling spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/17/10.1063/1.3504257
10.1063/1.3504257
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