TRANSPORT PROPERTIES AND BAND STRUCTURE OF GRAY TIN

摘要

In this report we describe an experimental investigation of the depend¬ence of the electrical conductivity and Hall coefficient of gray tin on pres¬sure and temperature. An empirical rule for pressure coefficients has been found from previous studies on many of the group IV and group III - group V -semiconductors: the pressure coefficient of a particular energy gap depends, on the symmetry of the electron states involved but varies little from material to material. By assuming that this rule includes gray tin, we are able to suggest a new model for the band structure.