Thermal transport in a dielectric T-shaped quantum wire

Ping Yang; Qing-feng Sun; Hong Guo; Bambi Hu

doi:10.1103/PhysRevB.75.235319

Thermal transport in a dielectric T-shaped quantum wire

Ping Yang^*, Qing-feng Sun, Hong Guo, Bambi Hu

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

61 Citations (Scopus)

Abstract

We investigate the thermal transport in a special ballistic system, the dielectric T-shaped quantum wire. It is found that the transmission coefficient of phonons exhibits the oscillation behavior similar to that of electrons. Due to the wide energy range involved in thermal transport, thermal conductance changes smoothly with temperature, which is different from the electrical conductance. We find that thermal conductance is a monotonic function of temperature at any system. In the low temperature limit, thermal conductance tends to π2 kB2 T 3h against all system parameters, even though the transmission coefficient is not unity.

Original language	English
Article number	235319
Number of pages	6
Journal	Physical Review B
Volume	75
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.75.235319
Publication status	Published - 15 Jun 2007

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.75.235319

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title = "Thermal transport in a dielectric T-shaped quantum wire",

abstract = "We investigate the thermal transport in a special ballistic system, the dielectric T-shaped quantum wire. It is found that the transmission coefficient of phonons exhibits the oscillation behavior similar to that of electrons. Due to the wide energy range involved in thermal transport, thermal conductance changes smoothly with temperature, which is different from the electrical conductance. We find that thermal conductance is a monotonic function of temperature at any system. In the low temperature limit, thermal conductance tends to π2 kB2 T 3h against all system parameters, even though the transmission coefficient is not unity.",

author = "Ping Yang and Qing-feng Sun and Hong Guo and Bambi Hu",

note = "This work was supported in part by grants provided by the Hong Kong Research Grants Council RGC and the Hong Kong Baptist University Faculty Research Grant FRG and in part by grants provided by the NSERC of Canada and FCAR of Qu{\'e}bec.",

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T1 - Thermal transport in a dielectric T-shaped quantum wire

AU - Yang, Ping

AU - Sun, Qing-feng

AU - Guo, Hong

AU - Hu, Bambi

N1 - This work was supported in part by grants provided by the Hong Kong Research Grants Council RGC and the Hong Kong Baptist University Faculty Research Grant FRG and in part by grants provided by the NSERC of Canada and FCAR of Québec.

PY - 2007/6/15

Y1 - 2007/6/15

N2 - We investigate the thermal transport in a special ballistic system, the dielectric T-shaped quantum wire. It is found that the transmission coefficient of phonons exhibits the oscillation behavior similar to that of electrons. Due to the wide energy range involved in thermal transport, thermal conductance changes smoothly with temperature, which is different from the electrical conductance. We find that thermal conductance is a monotonic function of temperature at any system. In the low temperature limit, thermal conductance tends to π2 kB2 T 3h against all system parameters, even though the transmission coefficient is not unity.

AB - We investigate the thermal transport in a special ballistic system, the dielectric T-shaped quantum wire. It is found that the transmission coefficient of phonons exhibits the oscillation behavior similar to that of electrons. Due to the wide energy range involved in thermal transport, thermal conductance changes smoothly with temperature, which is different from the electrical conductance. We find that thermal conductance is a monotonic function of temperature at any system. In the low temperature limit, thermal conductance tends to π2 kB2 T 3h against all system parameters, even though the transmission coefficient is not unity.

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U2 - 10.1103/PhysRevB.75.235319

DO - 10.1103/PhysRevB.75.235319

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VL - 75

JO - Physical Review B

JF - Physical Review B

IS - 23

M1 - 235319

ER -

Thermal transport in a dielectric T-shaped quantum wire

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