Towards experimental identification of vacancy complexes in InN
Identifieur interne : 002230 ( Main/Repository ); précédent : 002229; suivant : 002231Towards experimental identification of vacancy complexes in InN
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Abstract
In this contribution we present ab initio calculations of positron states and annihilation at vacancies and vacancy complexes in InN. Momentum distributions of annihilating electron-positron pairs in indium (VIn) and nitrogen vacancies (VN) as well as mixed vacancy clusters are calculated. Based on the modelled data the possibility of their experimental detection and distinction using positron annihilation spectroscopy is discussed. No localization of the positron density is found for isolated VN and VN clusters of up to 4VN. On the other hand, VIn and mixed vacancy clusters act as efficient positron traps in InN. While the calculated momentum distributions for the divacancy and VIn are quite close, mixed vacancy clusters which contain one VIn and two or more VN show well distinct spectra, that could be distinguished in suitable positron annihilation experiments.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Towards experimental identification of vacancy complexes in InN</title><author><name sortKey="Rauch, Christian" uniqKey="Rauch C">Christian Rauch</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Applied Physics, Aalto University, P.O. Box 11100</s1><s2>00076 Aalto, Espoo</s2><s3>FIN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Finlande</country><wicri:noRegion>00076 Aalto, Espoo</wicri:noRegion></affiliation></author><author><name sortKey="Makkonen, Ilja" uniqKey="Makkonen I">Ilja Makkonen</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Applied Physics, Helsinki Institute of Physics, Aalto University, P.O. Box 14100</s1><s2>00076 Aalto, Espoo</s2><s3>FIN</s3><sZ>2 aut.</sZ></inist:fA14><country>Finlande</country><wicri:noRegion>00076 Aalto, Espoo</wicri:noRegion></affiliation></author><author><name sortKey="Tuomisto, Filip" uniqKey="Tuomisto F">Filip Tuomisto</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Applied Physics, Aalto University, P.O. Box 11100</s1><s2>00076 Aalto, Espoo</s2><s3>FIN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Finlande</country><wicri:noRegion>00076 Aalto, Espoo</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="inist">11-0333825</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0333825 INIST</idno><idno type="RBID">Pascal:11-0333825</idno><idno type="wicri:Area/Main/Corpus">002D06</idno><idno type="wicri:Area/Main/Repository">002230</idno></publicationStmt><seriesStmt><idno type="ISSN">1862-6300</idno><title level="j" type="abbreviated">Phys. status solidi, A Appl. mater. sci. : (Print)</title><title level="j" type="main">Physica status solidi. A, Applications and materials science : (Print)</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ab initio calculations</term><term>Complex defect</term><term>Defect annihilation</term><term>Divacancy</term><term>Indium nitride</term><term>Momentum distribution</term><term>Positron annihilation</term><term>Sublattices</term><term>Vacancies</term><term>Vacancy cluster</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Défaut complexe</term><term>Calcul ab initio</term><term>Bilacune</term><term>Annihilation positon</term><term>Distribution quantité mouvement</term><term>Sous réseau</term><term>Lacune</term><term>Amas lacune</term><term>Annihilation défaut</term><term>Nitrure d'indium</term><term>InN</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this contribution we present ab initio calculations of positron states and annihilation at vacancies and vacancy complexes in InN. Momentum distributions of annihilating electron-positron pairs in indium (V<sub>In</sub>) and nitrogen vacancies (V<sub>N</sub>) as well as mixed vacancy clusters are calculated. Based on the modelled data the possibility of their experimental detection and distinction using positron annihilation spectroscopy is discussed. No localization of the positron density is found for isolated V<sub>N</sub> and V<sub>N</sub> clusters of up to 4V<sub>N</sub>. On the other hand, V<sub>In</sub> and mixed vacancy clusters act as efficient positron traps in InN. While the calculated momentum distributions for the divacancy and V<sub>In</sub> are quite close, mixed vacancy clusters which contain one V<sub>In</sub> and two or more V<sub>N</sub> show well distinct spectra, that could be distinguished in suitable positron annihilation experiments.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1862-6300</s0></fA01><fA03 i2="1"><s0>Phys. status solidi, A Appl. mater. sci. : (Print)</s0></fA03><fA05><s2>208</s2></fA05><fA06><s2>7</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Towards experimental identification of vacancy complexes in InN</s1></fA08><fA11 i1="01" i2="1"><s1>RAUCH (Christian)</s1></fA11><fA11 i1="02" i2="1"><s1>MAKKONEN (Ilja)</s1></fA11><fA11 i1="03" i2="1"><s1>TUOMISTO (Filip)</s1></fA11><fA14 i1="01"><s1>Department of Applied Physics, Aalto University, P.O. Box 11100</s1><s2>00076 Aalto, Espoo</s2><s3>FIN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></fA14><fA14 i1="02"><s1>Department of Applied Physics, Helsinki Institute of Physics, Aalto University, P.O. Box 14100</s1><s2>00076 Aalto, Espoo</s2><s3>FIN</s3><sZ>2 aut.</sZ></fA14><fA20><s1>1548-1550</s1></fA20><fA21><s1>2011</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>10183A</s2><s5>354000509409080180</s5></fA43><fA44><s0>0000</s0><s1>© 2011 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>17 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>11-0333825</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Physica status solidi. A, Applications and materials science : (Print)</s0></fA64><fA66 i1="01"><s0>DEU</s0></fA66><fC01 i1="01" l="ENG"><s0>In this contribution we present ab initio calculations of positron states and annihilation at vacancies and vacancy complexes in InN. Momentum distributions of annihilating electron-positron pairs in indium (V<sub>In</sub>) and nitrogen vacancies (V<sub>N</sub>) as well as mixed vacancy clusters are calculated. Based on the modelled data the possibility of their experimental detection and distinction using positron annihilation spectroscopy is discussed. No localization of the positron density is found for isolated V<sub>N</sub> and V<sub>N</sub> clusters of up to 4V<sub>N</sub>. On the other hand, V<sub>In</sub> and mixed vacancy clusters act as efficient positron traps in InN. While the calculated momentum distributions for the divacancy and V<sub>In</sub> are quite close, mixed vacancy clusters which contain one V<sub>In</sub> and two or more V<sub>N</sub> show well distinct spectra, that could be distinguished in suitable positron annihilation experiments.</s0></fC01><fC02 i1="01" i2="3"><s0>001B60A72J</s0></fC02><fC02 i1="02" i2="3"><s0>001B70H70B</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Défaut complexe</s0><s5>02</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Complex defect</s0><s5>02</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Defecto complejo</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Calcul ab initio</s0><s5>03</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Ab initio calculations</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Bilacune</s0><s5>04</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Divacancy</s0><s5>04</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Divacante</s0><s5>04</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Annihilation positon</s0><s5>05</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Positron annihilation</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Distribution quantité mouvement</s0><s5>06</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Momentum distribution</s0><s5>06</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Distribución cantidad movimiento</s0><s5>06</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Sous réseau</s0><s5>07</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Sublattices</s0><s5>07</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Lacune</s0><s5>08</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Vacancies</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Amas lacune</s0><s5>09</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Vacancy cluster</s0><s5>09</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Montón laguna</s0><s5>09</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Annihilation défaut</s0><s5>11</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Defect annihilation</s0><s5>11</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Aniquilación defecto</s0><s5>11</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Nitrure d'indium</s0><s5>15</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Indium nitride</s0><s5>15</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Indio nitruro</s0><s5>15</s5></fC03><fC03 i1="11" i2="3" l="FRE"><s0>InN</s0><s4>INC</s4><s5>52</s5></fC03><fN21><s1>227</s1></fN21></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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