Open AccessAcoustic phonon transport and thermal conductance in quantum waveguide with abrupt quantum junctions modulated with double T-shapedquantum structure
Author(s) -
Xiao-Fang Peng,
Liqun Chen,
Yun Luo,
Liu Lin-Hong,
Kaijun Wang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.056805
Subject(s) - conductance , transmission coefficient , scattering matrix method , condensed matter physics , scattering , phonon , conductance quantum , materials science , thermal conductivity , phonon scattering , quantum , thermal , quantum point contact , physics , transmission (telecommunications) , quantum well , optics , quantum mechanics , thermodynamics , laser , maxwell's equations , electrical engineering , composite material , engineering
By using the scattering matrix method, the transmission coefficient and thermal conductance of acoustic phonon through a quantum waveguide with abrupt quantum junctions modulated with double T-shaped quantum structure at low temperatures are studied. The results show that at very low temperatures, the double T-shaped quantum structure can enhance low-temperature thermal conductance; contrarily, at higher temperatures, the double T-shaped quantum structure can reduce low-temperature thermal conductance. However, in the whole low-temperature region, the low-temperature thermal conductance can be enhanced by adding the narrowest width c in the scattering region. Moreover, it is found that both the transmission coefficient and thermal conductance can be adjusted by changing the structural parameters of the the scattering region.