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[求助] 有没有人计算过电子声子耦合系数G:我按照公式计算铜的热导率差出两个数量级

有没有人计算过电子声子耦合系数G:我按照G=Pi^4*(ne*v*kb)^2/K计算铜的热导率差出两个数量级,有大神能指导下吗?铜的ne是8.4907E+28/m3,v是3810m/s,热导率K为401W/(m.K),kb=1.380649E-23(J/K),数据均是来自于维基百科,但是算纯的得G为4.84E18(W/(m3.K)),而实际金属的电子声子耦合系数数量级为1E16。求解答一下。
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