Effective Mass of the Positron in Sodium
Abstract
The band effective mass of the positron in sodium is computed by the standard method of Wigner, Seitz, and Bardeen. The result is m^{*}=1.06m, where m is the freeparticle mass. Combining it with the results of the manybody calculations of the effective mass of a positron interacting with a Fermi sea of electrons, one can conclude that the theoretical value is much smaller than the experimentally observed effective mass.
 Publication:

Physical Review
 Pub Date:
 September 1966
 DOI:
 10.1103/PhysRev.149.406
 Bibcode:
 1966PhRv..149..406M