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Electron States of Disordered Systems
Author(s) -
Bhattacharya A. K.,
Roy C. L.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220460207
Subject(s) - semiclassical physics , propagator , electron , quantum mechanics , physics , condensed matter physics , chemistry , atomic physics , quantum
The integrated density fo electronic states, g ( E ), of three‐dimensional disordered systems with spherical‐well type of atomic potential is computed. A pertubational treatment (based on Klauder's approach) and a non‐perturbational semiclassical method (based on Bonch‐Bruevich's treatment) have been used for the purpose; two approximate procedures being used for evaluating the dressed electron propagator relevant to the perturbational treatment. Various features of the results of the two treatments are compared and discussed critically. In particular, it is observed that the semiclassical treatment yields a tailing o g ( E ) extending up to arbitrarily low energies and both the treatments show an overal decrease of g ( E ) with concentration.