Fermi level pinning in Fe-doped PbTe under pressure
We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2 K≤T≤300 K, B ≤ 0.07 T) of Pb1−yFeyTe alloys upon varying the iron content, at atmospheric pressure and under hydrostatic co...
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creator | Skipetrov, E. P. Kruleveckaya, O. V. Skipetrova, L. A. Slynko, E. I. Slynko, V. E. |
description | We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2 K≤T≤300 K, B ≤ 0.07 T) of Pb1−yFeyTe alloys upon varying the iron content, at atmospheric pressure and under hydrostatic compression up to 10 kilobars. We find an increase of iron concentration along the length of the ingot and the appearance of microscopic inclusions enriched with iron in the heavily doped samples. Lightly doped alloys are characterized by the p-type metal conductivity. An increase of the iron impurity content leads to a decrease in the free hole concentration, a stabilization of galvanomagnetic parameters, indicating the pinning of the Fermi energy by the iron resonant impurity level lying under the bottom of the valence band, and to the p-n inversion of the conductivity type. Under pressure, the free hole concentration in the sample, in which the stabilization of galvanomagnetic parameters takes place, increases by approximately a factor of four due to the flow of electrons from the valence band to the iron-induced resonant level. Using the two-band Kane and the six-band Dimmock dispersion relations, the pressure dependence of the Fermi energy is calculated. The model of the electronic structure rearrangement of Pb1−yFeyTe under pressure is proposed. The energy position and the pressure coefficient of the resonant iron impurity level are determined. |
doi_str_mv | 10.1063/1.4890381 |
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P. ; Kruleveckaya, O. V. ; Skipetrova, L. A. ; Slynko, E. I. ; Slynko, V. E.</creator><creatorcontrib>Skipetrov, E. P. ; Kruleveckaya, O. V. ; Skipetrova, L. A. ; Slynko, E. I. ; Slynko, V. E.</creatorcontrib><description>We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2 K≤T≤300 K, B ≤ 0.07 T) of Pb1−yFeyTe alloys upon varying the iron content, at atmospheric pressure and under hydrostatic compression up to 10 kilobars. We find an increase of iron concentration along the length of the ingot and the appearance of microscopic inclusions enriched with iron in the heavily doped samples. Lightly doped alloys are characterized by the p-type metal conductivity. An increase of the iron impurity content leads to a decrease in the free hole concentration, a stabilization of galvanomagnetic parameters, indicating the pinning of the Fermi energy by the iron resonant impurity level lying under the bottom of the valence band, and to the p-n inversion of the conductivity type. Under pressure, the free hole concentration in the sample, in which the stabilization of galvanomagnetic parameters takes place, increases by approximately a factor of four due to the flow of electrons from the valence band to the iron-induced resonant level. Using the two-band Kane and the six-band Dimmock dispersion relations, the pressure dependence of the Fermi energy is calculated. The model of the electronic structure rearrangement of Pb1−yFeyTe under pressure is proposed. The energy position and the pressure coefficient of the resonant iron impurity level are determined.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4890381</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>ALLOYS ; Applied physics ; CONCENTRATION RATIO ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; DISPERSION RELATIONS ; DOPED MATERIALS ; Electromagnetism ; ELECTRONIC STRUCTURE ; ELECTRONS ; FERMI LEVEL ; Hydrostatic compression ; IMPURITIES ; Ingots ; Intermetallic compounds ; Iron ; IRON ADDITIONS ; LEAD TELLURIDES ; MAGNETIC FIELDS ; Magnetic properties ; MONOCRYSTALS ; Parameters ; Pinning ; PRESSURE DEPENDENCE ; Single crystals ; STABILIZATION ; Valence band ; VISIBLE RADIATION</subject><ispartof>Applied physics letters, 2014-07, Vol.105 (2)</ispartof><rights>2014 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c285t-809e8ca9304180e018aaf344f1270f5a8e100caadf570482749d311c8468c4d13</citedby><cites>FETCH-LOGICAL-c285t-809e8ca9304180e018aaf344f1270f5a8e100caadf570482749d311c8468c4d13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,782,786,887,27933,27934</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22311076$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Skipetrov, E. P.</creatorcontrib><creatorcontrib>Kruleveckaya, O. V.</creatorcontrib><creatorcontrib>Skipetrova, L. A.</creatorcontrib><creatorcontrib>Slynko, E. I.</creatorcontrib><creatorcontrib>Slynko, V. E.</creatorcontrib><title>Fermi level pinning in Fe-doped PbTe under pressure</title><title>Applied physics letters</title><description>We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2 K≤T≤300 K, B ≤ 0.07 T) of Pb1−yFeyTe alloys upon varying the iron content, at atmospheric pressure and under hydrostatic compression up to 10 kilobars. We find an increase of iron concentration along the length of the ingot and the appearance of microscopic inclusions enriched with iron in the heavily doped samples. Lightly doped alloys are characterized by the p-type metal conductivity. An increase of the iron impurity content leads to a decrease in the free hole concentration, a stabilization of galvanomagnetic parameters, indicating the pinning of the Fermi energy by the iron resonant impurity level lying under the bottom of the valence band, and to the p-n inversion of the conductivity type. Under pressure, the free hole concentration in the sample, in which the stabilization of galvanomagnetic parameters takes place, increases by approximately a factor of four due to the flow of electrons from the valence band to the iron-induced resonant level. Using the two-band Kane and the six-band Dimmock dispersion relations, the pressure dependence of the Fermi energy is calculated. The model of the electronic structure rearrangement of Pb1−yFeyTe under pressure is proposed. The energy position and the pressure coefficient of the resonant iron impurity level are determined.</description><subject>ALLOYS</subject><subject>Applied physics</subject><subject>CONCENTRATION RATIO</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>DISPERSION RELATIONS</subject><subject>DOPED MATERIALS</subject><subject>Electromagnetism</subject><subject>ELECTRONIC STRUCTURE</subject><subject>ELECTRONS</subject><subject>FERMI LEVEL</subject><subject>Hydrostatic compression</subject><subject>IMPURITIES</subject><subject>Ingots</subject><subject>Intermetallic compounds</subject><subject>Iron</subject><subject>IRON ADDITIONS</subject><subject>LEAD TELLURIDES</subject><subject>MAGNETIC FIELDS</subject><subject>Magnetic properties</subject><subject>MONOCRYSTALS</subject><subject>Parameters</subject><subject>Pinning</subject><subject>PRESSURE DEPENDENCE</subject><subject>Single crystals</subject><subject>STABILIZATION</subject><subject>Valence band</subject><subject>VISIBLE RADIATION</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNpFkMFKxDAURYMoOI4u_IOAKxfV95K0SZcyOCoM6GJch5i-aoaZtCat4N9bnQFXlwuHy-Uwdolwg1DJW7xRpgZp8IjNELQuJKI5ZjMAkEVVl3jKznLeTLUUUs6YXFLaBb6lL9ryPsQY4jsPkS-paLqeGv7ytiY-xoYS7xPlPCY6Zyet22a6OOScvS7v14vHYvX88LS4WxVemHIoDNRkvKslKDRAgMa5VirVotDQls4QAnjnmrbUoIzQqm6mt96oynjVoJyzq_1ul4dgsw8D-Q_fxUh-sEJMLOjqn-pT9zlSHuymG1OcjlmBoir1n5A5u95TPnU5J2ptn8LOpW-LYH_NWbQHc_IH9EBcJQ</recordid><startdate>20140714</startdate><enddate>20140714</enddate><creator>Skipetrov, E. P.</creator><creator>Kruleveckaya, O. V.</creator><creator>Skipetrova, L. A.</creator><creator>Slynko, E. I.</creator><creator>Slynko, V. E.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20140714</creationdate><title>Fermi level pinning in Fe-doped PbTe under pressure</title><author>Skipetrov, E. P. ; Kruleveckaya, O. V. ; Skipetrova, L. A. ; Slynko, E. I. ; Slynko, V. 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P.</creatorcontrib><creatorcontrib>Kruleveckaya, O. V.</creatorcontrib><creatorcontrib>Skipetrova, L. A.</creatorcontrib><creatorcontrib>Slynko, E. I.</creatorcontrib><creatorcontrib>Slynko, V. E.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Skipetrov, E. P.</au><au>Kruleveckaya, O. V.</au><au>Skipetrova, L. A.</au><au>Slynko, E. I.</au><au>Slynko, V. E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fermi level pinning in Fe-doped PbTe under pressure</atitle><jtitle>Applied physics letters</jtitle><date>2014-07-14</date><risdate>2014</risdate><volume>105</volume><issue>2</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2 K≤T≤300 K, B ≤ 0.07 T) of Pb1−yFeyTe alloys upon varying the iron content, at atmospheric pressure and under hydrostatic compression up to 10 kilobars. We find an increase of iron concentration along the length of the ingot and the appearance of microscopic inclusions enriched with iron in the heavily doped samples. Lightly doped alloys are characterized by the p-type metal conductivity. An increase of the iron impurity content leads to a decrease in the free hole concentration, a stabilization of galvanomagnetic parameters, indicating the pinning of the Fermi energy by the iron resonant impurity level lying under the bottom of the valence band, and to the p-n inversion of the conductivity type. Under pressure, the free hole concentration in the sample, in which the stabilization of galvanomagnetic parameters takes place, increases by approximately a factor of four due to the flow of electrons from the valence band to the iron-induced resonant level. Using the two-band Kane and the six-band Dimmock dispersion relations, the pressure dependence of the Fermi energy is calculated. The model of the electronic structure rearrangement of Pb1−yFeyTe under pressure is proposed. The energy position and the pressure coefficient of the resonant iron impurity level are determined.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4890381</doi></addata></record> |
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subjects | ALLOYS Applied physics CONCENTRATION RATIO CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY DISPERSION RELATIONS DOPED MATERIALS Electromagnetism ELECTRONIC STRUCTURE ELECTRONS FERMI LEVEL Hydrostatic compression IMPURITIES Ingots Intermetallic compounds Iron IRON ADDITIONS LEAD TELLURIDES MAGNETIC FIELDS Magnetic properties MONOCRYSTALS Parameters Pinning PRESSURE DEPENDENCE Single crystals STABILIZATION Valence band VISIBLE RADIATION |
title | Fermi level pinning in Fe-doped PbTe under pressure |
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