{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25067"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25067","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Surface conductance of germanium cleaved in liquid nitrogen","abstract":"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,","abstract_html":"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,","abstract_has_math":false,"creators":["Proix, Francoise Roberte Fernande"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Handler, Paul"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-31T16:08:40Z","date_published":"2011-05-31T16:08:40Z","updated_at":"2026-07-22T22:25:24Z","subjects":["germanium surface states","conductance","cleavage in liquid nitrogen","p-n-p structures"],"languages":["en"],"rights":["1966 Francoise Roberte Fernande Proix"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6124331"],"render_values":[{"text":"6124331","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25067","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Handler, Paul"]},{"key":"dc:creator","label":"Author","values":["Proix, Francoise Roberte Fernande"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-31T16:08:40Z","10000-01-01","1966"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["germanium surface states","conductance","cleavage in liquid nitrogen","p-n-p structures"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1966 Francoise Roberte Fernande Proix"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6124331","http://hdl.handle.net/2142/25067"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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"]},{"key":"dc:title","label":"Title","values":["Surface conductance of germanium cleaved in liquid nitrogen"]}]}],"canonical_facts":{"dc:contributor":["Handler, Paul"],"dc:creator":["Proix, Francoise Roberte Fernande"],"dc:date":["2011-05-31T16:08:40Z","10000-01-01","1966"],"dc:description":["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"],"dc:identifier":["6124331","http://hdl.handle.net/2142/25067"],"dc:language":["en"],"dc:rights":["1966 Francoise Roberte Fernande Proix"],"dc:subject":["germanium surface states","conductance","cleavage in liquid nitrogen","p-n-p structures"],"dc:title":["Surface conductance of germanium cleaved in liquid nitrogen"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:24Z"}