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Akash Anil Laturia

How does the tool compute the transverse effective mass for bulk si bandstructure

How does the tool compute the transverse effective mass for bulk Si?

 

 

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    Samik Mukherjee

    Hi ,

            Thank you for your interest in Bandstructure lab and apologies for the late reply.

    Bandstructure lab computes effective masses from the second derivative of the E-k relation. The direction of the derivative is in the direction of transport you wish , at a particular k-point. In this case the the transverse effective mass is calculated at the minima between Gamma and X. 

    The tool gives mt(XMin) = 0.20061 . This is close to the experimentally measured transverse effective mass of 0.19 . Source : http://www.ioffe.ru/SVA/NSM/Semicond/Si/bandstr.html#Masses

    Note , that the transverse effective is a transport effective mass. If you need to calculate density of states effective mass then please use the one from the link above. 

    Also note that effective mass changes with confinement.

    Regards,

    Samik

     

     

     

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