Lattice dynamics and superconducting properties of antiperovskite La3InZ (Z=N,O)
Identifieur interne : 000081 ( Main/Repository ); précédent : 000080; suivant : 000082Lattice dynamics and superconducting properties of antiperovskite La3InZ (Z=N,O)
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Abstract
Electronic and superconducting properties of La3InZ (Z=N, O) compounds are studied and are compared with La3In. From the density of states of La3InZ it is quite clear that the hybridization between La-d and In-p states gets reduced with the inclusion of the Z atom in comparison with La3In. A Fermi surface topology change is observed only in La3InO under compression, which is attributed to the non-monotonic variation of the density of states. The calculated superconducting transition temperature (Tc) is less than 2 K for N containing compound, and is found to be above 2 K for 0 containing compound and the trend agrees well with the experimental findings. The reason for the suppression of the Tc due to the inclusion of the Z atom is also discussed from the band structure and phonon dispersion plots, where we find the phonon modes to harden in La3InZ.
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Kanchana</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Indian Institute of Technology Hyderabad, Ordnance Factory Estate</s1><s2>Yeddumailaram 502 205, Andhra Pradesh</s2><s3>IND</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Inde</country><wicri:noRegion>Yeddumailaram 502 205, Andhra Pradesh</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="inist">14-0099112</idno><date when="2014">2014</date><idno type="stanalyst">PASCAL 14-0099112 INIST</idno><idno type="RBID">Pascal:14-0099112</idno><idno type="wicri:Area/Main/Corpus">000013</idno><idno type="wicri:Area/Main/Repository">000081</idno></publicationStmt><seriesStmt><idno type="ISSN">0038-1098</idno><title level="j" type="abbreviated">Solid state commun.</title><title level="j" type="main">Solid state communications</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Band structure</term><term>Fermi surface</term><term>Hybridization</term><term>Indium Lanthanum Nitrides Mixed</term><term>Indium Lanthanum Oxides Mixed</term><term>Phonon dispersion</term><term>Phonon mode</term><term>Superconducting transitions</term><term>Superconductivity</term><term>Superconductors</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Dispersion phonon</term><term>Mode phonon</term><term>Supraconductivité</term><term>Hybridation</term><term>Surface Fermi</term><term>Transition supraconductrice</term><term>Structure bande</term><term>Indium Lanthane Oxyde Mixte</term><term>Indium Lanthane Nitrure Mixte</term><term>Supraconducteur</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Electronic and superconducting properties of La<sub>3</sub>InZ (Z=N, O) compounds are studied and are compared with La<sub>3</sub>In. From the density of states of La<sub>3</sub>InZ it is quite clear that the hybridization between La-d and In-p states gets reduced with the inclusion of the Z atom in comparison with La<sub>3</sub>In. A Fermi surface topology change is observed only in La<sub>3</sub>InO under compression, which is attributed to the non-monotonic variation of the density of states. The calculated superconducting transition temperature (T<sub>c</sub>) is less than 2 K for N containing compound, and is found to be above 2 K for 0 containing compound and the trend agrees well with the experimental findings. The reason for the suppression of the T<sub>c</sub> due to the inclusion of the Z atom is also discussed from the band structure and phonon dispersion plots, where we find the phonon modes to harden in La<sub>3</sub>InZ.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0038-1098</s0></fA01><fA02 i1="01"><s0>SSCOA4</s0></fA02><fA03 i2="1"><s0>Solid state commun.</s0></fA03><fA05><s2>181</s2></fA05><fA08 i1="01" i2="1" l="ENG"><s1>Lattice dynamics and superconducting properties of antiperovskite La<sub>3</sub>InZ (Z=N,O)</s1></fA08><fA11 i1="01" i2="1"><s1>RAM (Swetarekha)</s1></fA11><fA11 i1="02" i2="1"><s1>KANCHANA (V.)</s1></fA11><fA14 i1="01"><s1>Department of Physics, Indian Institute of Technology Hyderabad, Ordnance Factory Estate</s1><s2>Yeddumailaram 502 205, Andhra Pradesh</s2><s3>IND</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></fA14><fA20><s1>54-59</s1></fA20><fA21><s1>2014</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>10917</s2><s5>354000506172580120</s5></fA43><fA44><s0>0000</s0><s1>© 2014 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>19 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>14-0099112</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Solid state communications</s0></fA64><fA66 i1="01"><s0>GBR</s0></fA66><fC01 i1="01" l="ENG"><s0>Electronic and superconducting properties of La<sub>3</sub>InZ (Z=N, O) compounds are studied and are compared with La<sub>3</sub>In. From the density of states of La<sub>3</sub>InZ it is quite clear that the hybridization between La-d and In-p states gets reduced with the inclusion of the Z atom in comparison with La<sub>3</sub>In. A Fermi surface topology change is observed only in La<sub>3</sub>InO under compression, which is attributed to the non-monotonic variation of the density of states. The calculated superconducting transition temperature (T<sub>c</sub>) is less than 2 K for N containing compound, and is found to be above 2 K for 0 containing compound and the trend agrees well with the experimental findings. The reason for the suppression of the T<sub>c</sub> due to the inclusion of the Z atom is also discussed from the band structure and phonon dispersion plots, where we find the phonon modes to harden in La<sub>3</sub>InZ.</s0></fC01><fC02 i1="01" i2="3"><s0>001B70D25J</s0></fC02><fC02 i1="02" i2="3"><s0>001B70D25K</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Dispersion phonon</s0><s5>02</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Phonon dispersion</s0><s5>02</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Dispersión fonón</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Mode phonon</s0><s5>03</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Phonon mode</s0><s5>03</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Modo fonón</s0><s5>03</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Supraconductivité</s0><s5>04</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Superconductivity</s0><s5>04</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Hybridation</s0><s5>06</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Hybridization</s0><s5>06</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Surface Fermi</s0><s5>08</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Fermi surface</s0><s5>08</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Transition supraconductrice</s0><s5>09</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Superconducting transitions</s0><s5>09</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Structure bande</s0><s5>10</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Band structure</s0><s5>10</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Indium Lanthane Oxyde Mixte</s0><s2>NC</s2><s2>NA</s2><s5>11</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Indium Lanthanum Oxides Mixed</s0><s2>NC</s2><s2>NA</s2><s5>11</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Mixto</s0><s2>NC</s2><s2>NA</s2><s5>11</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Indium Lanthane Nitrure Mixte</s0><s2>NC</s2><s2>NA</s2><s5>12</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Indium Lanthanum Nitrides Mixed</s0><s2>NC</s2><s2>NA</s2><s5>12</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Mixto</s0><s2>NC</s2><s2>NA</s2><s5>12</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Supraconducteur</s0><s5>15</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Superconductors</s0><s5>15</s5></fC03><fN21><s1>132</s1></fN21></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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