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Multimode quantized thermal conductance tuned by external field in a quantum wire
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10.1063/1.2956673
/content/aip/journal/apl/93/1/10.1063/1.2956673
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/1/10.1063/1.2956673
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of an NMW, which consists of three segments as described in the text. (b) Schematic diagram of a tunable phononic band in the NMW. In the left and the right segments, some -function-like PBS levels locate at the resonant frequencies in the RN chain. While in the central segment, acoustic branch is tuned by stretching, and the curve with different colors corresponds to different stretching. The inset shows that the cutoff frequency of the acoustic branch in central segment increases upon stretching the wire, where , , , and refer to different stretching, respectively. By increasing the stretching, gradually sweeps over , hence multiple phononic channels are sequentially opened.

Image of FIG. 2.
FIG. 2.

(a) The thermal conductance as a function of the stretching in the dimer wire (i.e., the NMW with ), where the total number of atoms is . (b) and (d) illustrate the transmission coefficients of phonons in the same dimer wire at different stretching , which is marked in the curve of thermal conductance. (c) and (e) illustrate the frequency spectra of phonons in the same dimer wire at different stretching , respectively. The calculation parameters are set as , , , , , and , respectively. Here , which is the oscillator frequency of the typical atom.

Image of FIG. 3.
FIG. 3.

(a) The thermal conductance as a function of the stretching in the trimer wire (i.e., the NMW with ), where the total number of atoms is . (b), (d), and (f) illustrate the transmission coefficients of phonons in the same trimer wire at different stretching , which is marked in the curve of thermal conductance. (c), (e), and (g) illustrate the frequency spectra of phonons in the same trimer wire at different stretching , respectively. The calculation parameters are the same as those in Fig. 2.

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/content/aip/journal/apl/93/1/10.1063/1.2956673
2008-07-09
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multimode quantized thermal conductance tuned by external field in a quantum wire
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/1/10.1063/1.2956673
10.1063/1.2956673
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