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Ballistic thermal transport contributed by the in-plane waves in a quantum wire modulated with an acoustic nanocavity
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10.1063/1.4770491
/content/aip/journal/jap/112/12/10.1063/1.4770491
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/12/10.1063/1.4770491
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of a two-dimensional quantum structure with an acoustic nanocavity lying in two narrow constrictions. Two leads are perfectly attached the hot and cold baths with temperatures and , respectively.

Image of FIG. 2.
FIG. 2.

The total transmission coefficient as a function of the reduced frequency . Curves b, c, and d correspond to the transverse width , 20, and 30 nm, respectively; curve a is for the perfect quantum wire. The top-left inset shows the detailed behavior in low frequency region. Here, we take , and . Two consecutive curves are vertically offset by a unity for clarity.

Image of FIG. 3.
FIG. 3.

(a) and (b) describe the transmission coefficient and as a function of the transverse width four three different incident frequency. The solid, dashed, and dotted curve corresponds to , and with being the cutoff frequency of the mth mode, respectively. Other parameters are the same as those in Fig. 2.

Image of FIG. 4.
FIG. 4.

The thermal conductance divided by temperature K/T as a function of the reduced temperature . The left column denotes , and the right column is for . (a0) and (b0), (a1) and (b1) represent the thermal conductance for the zeroth and first mode, respectively; and (a) and (b) is for the total thermal conductance. The solid, dashed, and dotted curve corresponds to , 20, and 30 nm, respectively. Other parameters are the same as those in Fig. 2.

Image of FIG. 5.
FIG. 5.

The total reduced thermal conductance K/T vs for three certain temperatures. (a)-(c) correspond to T = 0.5 K, 1 K, 4 K, respectively. Here, we fix L = 70 nm and .

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/content/aip/journal/jap/112/12/10.1063/1.4770491
2012-12-21
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ballistic thermal transport contributed by the in-plane waves in a quantum wire modulated with an acoustic nanocavity
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/12/10.1063/1.4770491
10.1063/1.4770491
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