Microscopic theory of quadrupolar ordering in TmTe
Identifieur interne : 002047 ( Main/Merge ); précédent : 002046; suivant : 002048Microscopic theory of quadrupolar ordering in TmTe
Auteurs : A. V. Nikolaev [Belgique] ; K. H. Michel [Belgique]Source :
- Physical review. B, Condensed matter and materials physics [ 1098-0121 ] ; 2001-03-01.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We have calculated the crystal electric field of TmTe (T>TQ) and have obtained that the ground state of a Tm 4f hole is the Γ7 doublet in agreement with Mossbauer experiments. We study the quadrupole interactions arising from quantum transitions of 4f holes of Tm. An effective attraction is found at the L point of the Brillouin zone qL. Assuming that the quadrupolar condensation involves a single arm of qL we show that there are two variants for quadrupole ordering which are described by the space groups C2/c and C2/m. The Landau free energy is derived in mean-field theory. The phase transition is of second order. The corresponding quadrupole order parameters are combinations of T2g and Eg components. The obtained domain structure is in agreement with observations from neutron diffraction studies for TmTe. Calculated lattice distortions are found to be different for the two variants of quadrupole ordering. We suggest to measure lattice displacements in order to discriminate between those two structures.
Links toward previous steps (curation, corpus...)
- to stream Pascal, to step Corpus: 000E85
- to stream Pascal, to step Curation: 000E85
- to stream Pascal, to step Checkpoint: 000D57
Links to Exploration step
Pascal:01-0101501Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Microscopic theory of quadrupolar ordering in TmTe</title><author><name sortKey="Nikolaev, A V" sort="Nikolaev, A V" uniqKey="Nikolaev A" first="A. V." last="Nikolaev">A. V. Nikolaev</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen, Belgium</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Belgique</country><wicri:regionArea>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen</wicri:regionArea><wicri:noRegion>2610 Antwerpen</wicri:noRegion><orgName type="university">Université d'Anvers</orgName><placeName><settlement type="city">Anvers</settlement><region>Région flamande</region><region type="district" nuts="2">Province d'Anvers</region></placeName></affiliation></author><author><name sortKey="Michel, K H" sort="Michel, K H" uniqKey="Michel K" first="K. H." last="Michel">K. H. Michel</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen, Belgium</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Belgique</country><wicri:regionArea>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen</wicri:regionArea><wicri:noRegion>2610 Antwerpen</wicri:noRegion><orgName type="university">Université d'Anvers</orgName><placeName><settlement type="city">Anvers</settlement><region>Région flamande</region><region type="district" nuts="2">Province d'Anvers</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">01-0101501</idno><date when="2001-03-01">2001-03-01</date><idno type="stanalyst">PASCAL 01-0101501 AIP</idno><idno type="RBID">Pascal:01-0101501</idno><idno type="wicri:Area/Pascal/Corpus">000E85</idno><idno type="wicri:Area/Pascal/Curation">000E85</idno><idno type="wicri:Area/Pascal/Checkpoint">000D57</idno><idno type="wicri:explorRef" wicri:stream="Pascal" wicri:step="Checkpoint">000D57</idno><idno type="wicri:doubleKey">1098-0121:2001:Nikolaev A:microscopic:theory:of</idno><idno type="wicri:Area/Main/Merge">002047</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Microscopic theory of quadrupolar ordering in TmTe</title><author><name sortKey="Nikolaev, A V" sort="Nikolaev, A V" uniqKey="Nikolaev A" first="A. V." last="Nikolaev">A. V. Nikolaev</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen, Belgium</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Belgique</country><wicri:regionArea>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen</wicri:regionArea><wicri:noRegion>2610 Antwerpen</wicri:noRegion><orgName type="university">Université d'Anvers</orgName><placeName><settlement type="city">Anvers</settlement><region>Région flamande</region><region type="district" nuts="2">Province d'Anvers</region></placeName></affiliation></author><author><name sortKey="Michel, K H" sort="Michel, K H" uniqKey="Michel K" first="K. H." last="Michel">K. H. Michel</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen, Belgium</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Belgique</country><wicri:regionArea>Department of Physics, University of Antwerp, UIA, 2610 Antwerpen</wicri:regionArea><wicri:noRegion>2610 Antwerpen</wicri:noRegion><orgName type="university">Université d'Anvers</orgName><placeName><settlement type="city">Anvers</settlement><region>Région flamande</region><region type="district" nuts="2">Province d'Anvers</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Physical review. B, Condensed matter and materials physics</title><title level="j" type="abbreviated">Phys. rev., B, Condens. matter mater. phys.</title><idno type="ISSN">1098-0121</idno><imprint><date when="2001-03-01">2001-03-01</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Physical review. B, Condensed matter and materials physics</title><title level="j" type="abbreviated">Phys. rev., B, Condens. matter mater. phys.</title><idno type="ISSN">1098-0121</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crystal field interactions</term><term>Free energy</term><term>Ground states</term><term>Quadrupole interactions</term><term>Solid-state phase transformations</term><term>Space groups</term><term>Theoretical study</term><term>Thulium compounds</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>6470K</term><term>7110</term><term>7127</term><term>7145</term><term>Etude théorique</term><term>Thulium composé</term><term>Interaction quadripolaire</term><term>Groupe espace</term><term>Energie libre</term><term>Interaction champ cristallin</term><term>Etat fondamental</term><term>Transformation phase état solide</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We have calculated the crystal electric field of TmTe (T>T<sub>Q</sub>) and have obtained that the ground state of a Tm 4f hole is the Γ<sub>7</sub> doublet in agreement with Mossbauer experiments. We study the quadrupole interactions arising from quantum transitions of 4f holes of Tm. An effective attraction is found at the L point of the Brillouin zone q<sub>L</sub>. Assuming that the quadrupolar condensation involves a single arm of q<sub>L</sub> we show that there are two variants for quadrupole ordering which are described by the space groups C2/c and C2/m. The Landau free energy is derived in mean-field theory. The phase transition is of second order. The corresponding quadrupole order parameters are combinations of T<sub>2g</sub> and E<sub>g</sub> components. The obtained domain structure is in agreement with observations from neutron diffraction studies for TmTe. Calculated lattice distortions are found to be different for the two variants of quadrupole ordering. We suggest to measure lattice displacements in order to discriminate between those two structures.</div></front></TEI><affiliations><list><country><li>Belgique</li></country><region><li>Province d'Anvers</li><li>Région flamande</li></region><settlement><li>Anvers</li></settlement><orgName><li>Université d'Anvers</li></orgName></list><tree><country name="Belgique"><region name="Région flamande"><name sortKey="Nikolaev, A V" sort="Nikolaev, A V" uniqKey="Nikolaev A" first="A. V." last="Nikolaev">A. V. Nikolaev</name></region><name sortKey="Michel, K H" sort="Michel, K H" uniqKey="Michel K" first="K. H." last="Michel">K. H. Michel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/ThuliumV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002047 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 002047 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= ThuliumV1
|flux= Main
|étape= Merge
|type= RBID
|clé= Pascal:01-0101501
|texte= Microscopic theory of quadrupolar ordering in TmTe
}}
| This area was generated with Dilib version V0.6.21. |  |