OBSERVATION OF SECOND SOUND IN BISMUTH
OBSERVATION OF SECOND SOUND IN BISMUTH
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DOI：
10.1103/physrevlett.28.1461
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发表时间：
1972-01-01
影响因子：
8.6
通讯作者：
DYNES, RC
中科院分区：
文献类型：
--
作者：
NARAYANA.V;DYNES, RC
在1.2 ~ 4.0K的温度范围内，我们观察到半金属铋中热（声子）脉冲从弹道传播到第二声传播再到扩散传播的转变。饱和秒声速与方位无关，其aa值为（0.78±0.05）× 105 cm/sec（德拜声速的133倍）。正常过程声子寿命的倒数为T N− 1= 4.49× 10 4 T 4 sec− 1。由于空穴-声子相互作用的散射观察到弹道L模式沿沿着C3轴传播。
We have observed the transition from ballistic to second sound to diffusive propagation of heat (phonon) pulses in the semimetal bismuth in the temperature range of 1.2 to 4.0 K. The saturated second-sound velocity is found to be independent of orientation and has aa value of (0.78±0.05)× 10 5 cm/sec (1 3 3 times the Debye velocity). The inverse of the normal process phonon lifetime has a value T N− 1= 4.49× 10 4 T 4 sec− 1. Scattering due to the hole-phonon interaction is observed for ballistic L modes propagating along the C 3 axis.