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Handler, Paul Proix, Francoise Roberte Fernande 2011-05-31T16:08:40Z 2011-05-31T16:08:40Z 10000-01-01 1966 The surface states of germanium have been investigated by measuring the change in conductance occurring upon cleavage of a (Ill) plane, in liquid nitrogen, Experiments are carried out with n-type samples whose donor concentrations vary from 10 13 to 10 18 /cm 3 • D-c measurements are made on p-n-p structures; upon cleavage ~ a po-type channel is formed across the surface, It is found that at the low temperature of the experiment and with the large electric field existing at the surface, quantum mechanical effects arise in the space charge region. A method of analysis is presented with a pseudo two-dimensi.onal space charge region, and applied for two extreme values of the hole mobility, The results are related to two models of the surface energy spectrum for the excess electrons: 1) a discrete level with 1,44 x 10 15 states/cni 2 , 2) a 20 ev wide band of levels with '7,22 x 10 13 states/cm 2 -ev. It is shown that the heavy holes in the space charge region are more likely to move with a mobiLity close to their bulk mobility, Acceptor-like surface states are found to lie 0,06 +- 0,03 ev above the first allowed level for heavy holes. It is not possible to decide on the distribution of states, Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:08:40Z No. of bitstreams: 1 1966_proix.pdf: 3338688 bytes, checksum: 9bcc7534be44a251938af00eb5574eff (MD5) Made available in DSpace on 2011-05-31T16:08:40Z (GMT). No. of bitstreams: 1 1966_proix.pdf: 3338688 bytes, checksum: 9bcc7534be44a251938af00eb5574eff (MD5) Previous issue date: 1966 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:08:41Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:13:13-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6124331 http://hdl.handle.net/2142/25067 en 1966 Francoise Roberte Fernande Proix germanium surface states conductance cleavage in liquid nitrogen p-n-p structures Surface conductance of germanium cleaved in liquid nitrogen Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.