{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25629"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25629","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Determination of the liquid-gas phase diagram for electrons and holes in germanium","abstract":"The existence of the electron-hole gas (EHG) phase has been confirmed in Ge by direct observation and the phase diagram and critical point of the liquid-gas transition have been determined. The position of the metal-insulator transition has been estimated. The electron-hole 1iquid-EHG-exciton system was investigated spectroscopically with particular attention paid to the liquid-gas critica1 region. Theoretical 1ineshapes for the electron-hole liquid (EHL) and excitons are derived and used to determine the liquid density. Measurements of the exciton line second moment and the ratio of the forbidden intensity to the allowed intensity are discussed and used to present convincing evidence that the broadening of the low energy edge of the exciton line near Tc is due to luminescence from the EHG. The lever rule for two coexisting phases is combined with the ratio of the EHG and EHL intensities to determine the EHG density. A universal liquid-gas coexistence curve is fitted to the results and the critical point is found x 1016 3 to lie at Tc = 7.0 ±0.1 K, nc = 8.9 ±O.S cm-. From measurements of the exciton second moments as a function of temperature the position of the metal-insulator transition is estimated.","abstract_html":"The existence of the electron-hole gas (EHG) phase has been confirmed in Ge by direct observation and the phase diagram and critical point of the liquid-gas transition have been determined. The position of the metal-insulator transition has been estimated. The electron-hole 1iquid-EHG-exciton system was investigated spectroscopically with particular attention paid to the liquid-gas critica1 region. Theoretical 1ineshapes for the electron-hole liquid (EHL) and excitons are derived and used to determine the liquid density. Measurements of the exciton line second moment and the ratio of the forbidden intensity to the allowed intensity are discussed and used to present convincing evidence that the broadening of the low energy edge of the exciton line near Tc is due to luminescence from the EHG. The lever rule for two coexisting phases is combined with the ratio of the EHG and EHL intensities to determine the EHG density. A universal liquid-gas coexistence curve is fitted to the results and the critical point is found x 1016 3 to lie at Tc = 7.0 ±0.1 K, nc = 8.9 ±O.S cm-. From measurements of the exciton second moments as a function of temperature the position of the metal-insulator transition is estimated.","abstract_has_math":false,"creators":["Miniscalco, William Joseph"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Salamon, Myron B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-01T18:28:30Z","date_published":"2011-07-01T18:28:30Z","updated_at":"2026-07-22T22:25:24Z","subjects":["liquid-gas phase diagram","electron-hole gas (EHG) phase","germanium","metal-insulator transition"],"languages":["en"],"rights":["1977 William Joseph Miniscalco"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["252917"],"render_values":[{"text":"252917","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25629","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Salamon, Myron B."]},{"key":"dc:creator","label":"Author","values":["Miniscalco, William Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-01T18:28:30Z","10000-01-01","1977"]},{"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":["liquid-gas phase diagram","electron-hole gas (EHG) phase","germanium","metal-insulator transition"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1977 William Joseph Miniscalco"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["252917","http://hdl.handle.net/2142/25629"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The existence of the electron-hole gas (EHG) phase has been confirmed in Ge by direct observation and the phase diagram and critical point of the liquid-gas transition have been determined. The position of the metal-insulator transition has been estimated. The electron-hole 1iquid-EHG-exciton system was investigated spectroscopically with particular attention paid to the liquid-gas critica1 region. Theoretical 1ineshapes for the electron-hole liquid (EHL) and excitons are derived and used to determine the liquid density. Measurements of the exciton line second moment and the ratio of the forbidden intensity to the allowed intensity are discussed and used to present convincing evidence that the broadening of the low energy edge of the exciton line near Tc is due to luminescence from the EHG. The lever rule for two coexisting phases is combined with the ratio of the EHG and EHL intensities to determine the EHG density. A universal liquid-gas coexistence curve is fitted to the results and the critical point is found x 1016 3 to lie at Tc = 7.0 ±0.1 K, nc = 8.9 ±O.S cm-. From measurements of the exciton second moments as a function of temperature the position of the metal-insulator transition is estimated.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T18:28:30Z No. of bitstreams: 1 1977_miniscalco.pdf: 3182390 bytes, checksum: 75218b4769d976a16d1d480a1ea2f656 (MD5)","Made available in DSpace on 2011-07-01T18:28:30Z (GMT). No. of bitstreams: 1 1977_miniscalco.pdf: 3182390 bytes, checksum: 75218b4769d976a16d1d480a1ea2f656 (MD5) Previous issue date: 1977","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T18:28:30Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:35-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Determination of the liquid-gas phase diagram for electrons and holes in germanium"]}]}],"canonical_facts":{"dc:contributor":["Salamon, Myron B."],"dc:creator":["Miniscalco, William Joseph"],"dc:date":["2011-07-01T18:28:30Z","10000-01-01","1977"],"dc:description":["The existence of the electron-hole gas (EHG) phase has been confirmed in Ge by direct observation and the phase diagram and critical point of the liquid-gas transition have been determined. The position of the metal-insulator transition has been estimated. The electron-hole 1iquid-EHG-exciton system was investigated spectroscopically with particular attention paid to the liquid-gas critica1 region. Theoretical 1ineshapes for the electron-hole liquid (EHL) and excitons are derived and used to determine the liquid density. Measurements of the exciton line second moment and the ratio of the forbidden intensity to the allowed intensity are discussed and used to present convincing evidence that the broadening of the low energy edge of the exciton line near Tc is due to luminescence from the EHG. The lever rule for two coexisting phases is combined with the ratio of the EHG and EHL intensities to determine the EHG density. A universal liquid-gas coexistence curve is fitted to the results and the critical point is found x 1016 3 to lie at Tc = 7.0 ±0.1 K, nc = 8.9 ±O.S cm-. From measurements of the exciton second moments as a function of temperature the position of the metal-insulator transition is estimated.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T18:28:30Z No. of bitstreams: 1 1977_miniscalco.pdf: 3182390 bytes, checksum: 75218b4769d976a16d1d480a1ea2f656 (MD5)","Made available in DSpace on 2011-07-01T18:28:30Z (GMT). No. of bitstreams: 1 1977_miniscalco.pdf: 3182390 bytes, checksum: 75218b4769d976a16d1d480a1ea2f656 (MD5) Previous issue date: 1977","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-01T18:28:30Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:35-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["252917","http://hdl.handle.net/2142/25629"],"dc:language":["en"],"dc:rights":["1977 William Joseph Miniscalco"],"dc:subject":["liquid-gas phase diagram","electron-hole gas (EHG) phase","germanium","metal-insulator transition"],"dc:title":["Determination of the liquid-gas phase diagram for electrons and holes in germanium"],"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"}