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Coupling effect on phonon thermal transport in a double-stub quantum wire
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10.1063/1.2196054
/content/aip/journal/apl/88/16/10.1063/1.2196054
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/16/10.1063/1.2196054
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Structure of a double-stub quantum wire.

Image of FIG. 2.
FIG. 2.

Thermal conductance divided by temperature, , which is reduced by the zero-temperature universal value , as a function of the reduced temperature . (a) is for the stress-free boundary. Curve a corresponds to the total , which includes the contributions of all the propagation modes. By our calculations, however, only the first six modes can make their contributions to the total thermal conductance for the explored temperature scope. Curves b–e correspond to of modes 0–3, respectively. (b) is for the hard-wall boundary: curve a represents the total including the contributions from modes 1–6, and curves b–e correspond to of modes 1–4, respectively. Here, we take , , and .

Image of FIG. 3.
FIG. 3.

The thermal conductance as a function of the reduced temperature for different : (a) and (b) correspond to the stress-free and hard-wall boundary conditions, respectively. Dotted, dot-dashed, solid, and dashed curves correspond to , 8, 15, and , respectively. Here, we take , , and .

Image of FIG. 4.
FIG. 4.

The thermal conductance as a function of the width for different temperature for the stress-free-boundary condition: (a)–(c) correspond to the reduced temperatures , 0.1739, and 0.3478, respectively. The solid curve represents the total , and the dotted curve is that of zero acoustic mode. When , only the zero mode can be excited, and the total is factually that of zero mode. When , mode 1 has also been excited. As the temperature is increased to 0.3478, mode 2 is also excited. Here, we take , , and .

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/content/aip/journal/apl/88/16/10.1063/1.2196054
2006-04-18
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Coupling effect on phonon thermal transport in a double-stub quantum wire
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/16/10.1063/1.2196054
10.1063/1.2196054
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