The influence of flaws on phonon thermal conductance in a dielectric quantum wire

2007 ◽  
Vol 40 (22) ◽  
pp. 7159-7165 ◽  
Author(s):  
Yan Wang ◽  
Ling-Ling Wang ◽  
Li-Ming Tang ◽  
BS Zou ◽  
Li-Hua Zhao
Keyword(s):  
Quantum Wire ◽  
Thermal Conductance ◽  
Phonon Thermal Conductance

Multimode quantized thermal conductance tuned by external field in a quantum wire

2008 ◽  
Vol 93 (1) ◽  
pp. 011908 ◽  
Author(s):  
L. S. Cao ◽  
R. W. Peng ◽  
Mu Wang
Keyword(s):  
External Field ◽  
Quantum Wire ◽  
Thermal Conductance

Significantly enhanced thermoelectric performance of molecular junctions by the twist angle dependent phonon interference effect

2020 ◽  
Vol 8 (23) ◽  
pp. 11884-11891 ◽  
Author(s):  
Yu-Jia Zeng ◽  
Dan Wu ◽  
Xuan-Hao Cao ◽  
Ye-Xin Feng ◽  
Li-Ming Tang ◽  
...  
Keyword(s):  
Interference Effect ◽  
Twist Angle ◽  
Thermal Conductance ◽  
Molecular Junctions ◽  
Thermoelectric Performance ◽  
Phonon Thermal Conductance

The twist angle can induce phonon interference effect in the intermediately coupled molecular junctions and significantly suppress phonon thermal conductance.

Enhanced thermoelectric properties in nanowires of InAs modulated with multiple-stub structures

2019 ◽  
Vol 9 (5) ◽  
pp. 498-502
Author(s):  
Changning Pan ◽  
Jun He ◽  
Zhiming Liu ◽  
Kaixing Shi
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Thermal Conductance ◽  
Volume Ratio ◽  
Electronic Density ◽  
Energy Filtering ◽  
Carrier Energy ◽  
Inas Nanowires ◽  
Scattering Matrix Method ◽  
Phonon Thermal Conductance

The thermoelectric properties of InAs nanowires modulated with the multiple-stub structures are studied using the scattering-matrix method. Owing to the very large surface-to-volume ratio, both the phonon and electron transport sensitively depend on the geometric structure. Carrier energy filtering which locally distorts electronic density of states strongly enhances the thermopower. Thus optimized thermopower, together with the significant reduction of the phonon thermal conductance, yields the high thermoelectric figure of merit ZT to 0.3∼1.9.

Acoustic phonon transport and thermal conductance in a periodically modulated quantum wire

2007 ◽  
Vol 40 (5) ◽  
pp. 1497-1500 ◽  
Author(s):  
Li-Ming Tang ◽  
Lingling Wang ◽  
Wei-Qing Huang ◽  
B S Zou ◽  
Ke-Qiu Chen
Keyword(s):  
Quantum Wire ◽  
Acoustic Phonon ◽  
Thermal Conductance ◽  
Phonon Transport

Quantized thermal conductance at low temperatures in quantum wire with catenoidal contacts

2010 ◽  
Vol 81 (19) ◽  
Author(s):  
Xiao-Fang Peng ◽  
Ke-Qiu Chen ◽  
Qing Wan ◽  
B. S. Zou ◽  
Wenhui Duan
Keyword(s):  
Low Temperatures ◽  
Quantum Wire ◽  
Thermal Conductance

THERMAL TRANSPORT BY BALLISTIC PHONON IN A SEMICONDUCTOR RECTANGULAR QUANTUM WIRE MODULATED WITH QUANTUM DOT

2009 ◽  
Vol 23 (30) ◽  
pp. 3597-3607 ◽  
Author(s):  
XIAO-YAN YU ◽  
XIAO-FANG PENG ◽  
KE-QIU CHEN
Keyword(s):  
Quantum Dot ◽  
Thermal Transport ◽  
Low Temperatures ◽  
Quantum Wire ◽  
Thermal Conductance ◽  
Phonon Transport ◽  
Total Transmission ◽  
Coefficient Versus ◽  
Increasing Temperature ◽  
Scattering Matrix Method

Thermal transport by ballistic phonon in a semiconductor rectangular quantum wire modulated with quantum dot at low temperatures is investigated with the use of the scattering matrix method. The calculated results show that the total transmission coefficient versus the reduced phonon frequency exhibits interesting characteristics such as inhomogeneous quantum transport steps. Quantized thermal conductance plateau can be observed at low temperatures, and the thermal conductance is not increased monotonically with increasing temperature. The results also show that the phonon transport probability and thermal conductance can be controlled to a certain degree by adjusting the parameters of the proposed quantum structure.

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