Phonon Transport and Thermal Conductivity in an Acoustic Filter
LU Jian-Duo1, SHAO Liang1, HOU Yang-Lai1, YI Lin2
1Department of Applied Physics, Wuhan University of Science and Technology, Wuhan 4300812Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Phonon Transport and Thermal Conductivity in an Acoustic Filter
LU Jian-Duo1;SHAO Liang1;HOU Yang-Lai1;YI Lin2
1Department of Applied Physics, Wuhan University of Science and Technology, Wuhan 4300812Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
摘要We investigate the phonon ballistic transmission and the thermal conductivity in a dielectric quantum structure. It is found that these observable quantities sensitively depend on geometric parameters, and are of quantum character. The total transmission coefficient as a function of the reduced waveguide-length exhibits periodical behaviour and the reduced thermal conductance decreases below the ideal universal value for the low temperature. Our results show that one can control the thermal conductivity of the structure and make all kinds of acoustic filters to match practical requirements in devices by adjusting the geometric parameters.
Abstract：We investigate the phonon ballistic transmission and the thermal conductivity in a dielectric quantum structure. It is found that these observable quantities sensitively depend on geometric parameters, and are of quantum character. The total transmission coefficient as a function of the reduced waveguide-length exhibits periodical behaviour and the reduced thermal conductance decreases below the ideal universal value for the low temperature. Our results show that one can control the thermal conductivity of the structure and make all kinds of acoustic filters to match practical requirements in devices by adjusting the geometric parameters.
LU Jian-Duo;SHAO Liang;HOU Yang-Lai;YI Lin. Phonon Transport and Thermal Conductivity in an Acoustic Filter[J]. 中国物理快报, 2007, 24(3): 793-796.
LU Jian-Duo, SHAO Liang, HOU Yang-Lai, YI Lin. Phonon Transport and Thermal Conductivity in an Acoustic Filter. Chin. Phys. Lett., 2007, 24(3): 793-796.
[1] Sun Q F and Xie X C 2005 Phys. Rev. B 71 155321 Lu J D, Shao L, Hou Y L and Hou T P 2007 Solid State Commun. 141 61 Lu J D and Yi L 2006 Int. J. Mod. Phys. B 20 2283 Lu J D, Dai H M, Fang A H and Hou Y L 2007 Int. J. Mod.Phys. B (in press) [2]Schwab K, Henrlksen E A and Worlock J M 2000 Nature 404 974 [3]Blencowe M P 1999 Phys. Rev. B 59 4992 Li W X, Chen K Q, and Duan W H 2003 J. Phys. D: Appl. Phys. 36 3027 [4]Angelescu D E, Cross M C and Roukes M L 1998 SuperlatticesMicrostructures 23 673 [5]Rego L G C and Kirczenow G 1998 Phys. Rev. Lett. 81 232 Sun Q F, Yang P and Guo H 2002 Phys. Rev. Lett. 89 175901 [6]Gao H P, Wu B M, Li B, Wang M and Du K 2005 Chin. Phys.Lett. 22 915 [7]Tanaka Y, Yoshida F and Tamura S 2005 Phys. Rev. B 71 205308 Liu D S, Zhang D C, Xie S J and Mei L M 2005 Chin. Phys. Lett. 22 178 [8]Lu J D, Yi L, Li J X, Sun Y Z and Zhao H 2006 Commun. Theor.Phys. 46 568 [9]Takahiro Y, Satoshi W and Kazuyuki W 2004 Phys. Rev. Lett. 92 075502 [10]Xiao Y, Yan X H, Cao J X, Mao Y L, Deng Y X and Ding J W 2004 Chin. Phys. Lett. 21 517 [11]Leitner D M 2001 Phys. Rev. B 64 094201 [12]Gao C M, Zhang S Y, Zhang Z N, Shui X J and Jiang T 2005 Chin.Phys. Lett. 22 2309 [13]Palasantzas G 2004 Phys. Rev. B 70 153404 [14]Santamore D H and Cross M C 2001 Phys. Rev. B 63 184306
2007, Vol. 24 
