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Acoustic phonon transport in a four-channel quantum structure
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10.1063/1.3130412
/content/aip/journal/jap/105/10/10.1063/1.3130412
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/10/10.1063/1.3130412
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of (a) symmetric and (b) asymmetric four-channel quantum structures. denotes lateral width of region in turn. The distances between regions III and IV, IV and V, and V and VI are , , , respectively. is the distance between region I and axis.

Image of FIG. 2.
FIG. 2.

Transmission coefficients as a function of . and correspond to modes 0 and 1, respectively. In , , , and , , , , and are 22, 22, 10, and 2 nm; 22, 22, 15, and 2 nm; 22, 22, 10, and 12 nm; and 32, 22, 10, and 2 nm, respectively. Here, we take , and . The dash-dotted and solid curves correspond to transmission coefficients in channels IV(V) and III(VI), respectively.

Image of FIG. 3.
FIG. 3.

Transmission coefficients vs . and correspond to modes 0 and 1, respectively. Here, we take , , , , and . The explanations for curves are the same as that in Fig. 2.

Image of FIG. 4.
FIG. 4.

Transmission coefficients as a function of . (a), (b), (c), and (d) correspond to modes 0, 1, 2, 3, respectively. Here, we take , , , , and . The explanations for curves are the same as that in Fig. 2.

Image of FIG. 5.
FIG. 5.

Transmission coefficients as a function of . (a), (b), (c), and (d) correspond to modes 0, 1, 2, 3, respectively. Here, we take , , , and . The explanations for curves are the same as that in Fig. 2.

Image of FIG. 6.
FIG. 6.

Transmission coefficients as a function of . correspond to mode 0. , , , and correspond to modes 1, 2, 3, and 1, respectively. In , , , and , and correspond to 30 nm, ; 30 nm, ; 30 nm, ; and 20 nm, , respectively. Here, we take , , , and . The solid, dash-dotted, dotted, and dashed curves correspond to transmission coefficients in channels III, IV, V, and VI, respectively.

Image of FIG. 7.
FIG. 7.

Transmission coefficients vs . and correspond to modes 0 and 1, respectively. In and , , , and correspond to 22, 10, 10, and 2 nm and 22, 12, 22, and 10 nm, respectively. Here, we take , and . The explanations for curves are the same as that in Fig. 6.

Image of FIG. 8.
FIG. 8.

Thermal conductance divided by temperature reduced by the zero-temperature universal value as a function of the reduced temperature for the different shown in Fig. 1(a), where . (a) and (b) correspond to total thermal conductance of channels III(VI) and IV(V), respectively; the solid, dotted, dash-dotted, and dashed curves correspond to , 10, 15, and 20 nm, respectively. (c), (d), and (e) correspond to thermal conductance of modes 0, 1, and 2, respectively; the solid and dotted curves correspond to thermal conductances of channels III(VI) and IV(V), respectively. Here, we take , , , and . Note that the dotted curve in (e) is superposed on the reduced temperature axis.

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/content/aip/journal/jap/105/10/10.1063/1.3130412
2009-05-27
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acoustic phonon transport in a four-channel quantum structure
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/10/10.1063/1.3130412
10.1063/1.3130412
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