Giant Quantum Attenuation of Sound Waves in Bismuth. : II. Line Shape of the Attenuation Coefficient
Giant Quantum Attenuation of Sound Waves in Bismuth. : II. Line Shape of the Attenuation Coefficient
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DOI：
10.1143/jpsj.28.1211
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发表时间：
1970-05
影响因子：
1.7
通讯作者：
Y. Matsumoto;T. Sakai;S. Mase
中科院分区：
文献类型：
--
作者：
Y. Matsumoto;T. Sakai;S. Mase
根据现有理论，研究了铋中声波巨量子衰减的线形，并与我们的测量结果进行了比较。通过考虑能级展宽和热电子效应的能量和磁场依赖性，我们可以了解关于每个峰值场的线形状的对称性以及在高场区域中观察到的衰减峰值的饱和趋势。电子朗道能级接触费米能级的寿命最小值为2.5×10 -10 秒；这是在液氦温度下平行于平分线轴的磁场获得的，比 Bhargava 从 de Hass-van Alphen 效应得出的值大大约两个数量级。在电子和空穴同时满足共振的条件下，实验线形的显着变化可以通过考虑费米能的磁场依赖性来定性地解释。
The line shape of the giant quantum attenuation of sound waves in bismuth is studied on the basis of current theories and compared with our measurements. By taking into account the energy and magnetic field dependences of the level broadening and the hot electron effect, we may understand the symmetry of the line shape with regard to each peak field and the tendency to saturation of the attenuation peaks observed in a high field region. The minimum value of the life time of the electron Landau level touching the Fermi level is 2.5×10 -10 sec; this is obtained for the magnetic field parallel to a bisectrix axis at liquid helium temperature and is about two orders of magnitude larger than the value derived from the de Hass-van Alphen effect by Bhargava. The remarkable change of the experimental line shape under conditions such that the electrons and holes simultaneously satisfy resonance can be qualitatively explained by taking into account the magnetic field dependence of the Fermi energy.