Charge fluctuations in the intermediate-valence ground state of SmCoInâ‚…
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{
"updated": "2023-09-13T07:15:01.391825+00:00",
"created": "2023-01-18T14:47:36.205276+00:00",
"id": "1622",
"metadata": {
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"mcid": "2023.111",
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"contributors": [
{
"givennames": "David W.",
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Tam"
},
{
"givennames": "Nicola",
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Colonna",
"email": "nicola.colonna@psi.ch"
},
{
"givennames": "Neeraj",
"affiliations": [
"Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Kumar"
},
{
"givennames": "Cinthia",
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Piamonteze"
},
{
"givennames": "Fatima",
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Alarab"
},
{
"givennames": "Vladimir",
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Strocov"
},
{
"givennames": "Antonio",
"affiliations": [
"Laboratory for Synchrotron Radiation - Condensed Matter, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Cervellino"
},
{
"givennames": "Tom",
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
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"familyname": "Fennell"
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{
"givennames": "Dariusz Jakub",
"affiliations": [
"Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, 5232 Villigen, Switzerland"
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"familyname": "Gawryluk"
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{
"givennames": "Ekaterina",
"affiliations": [
"Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, 5232 Villigen, Switzerland"
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"familyname": "Pomjakushina"
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{
"givennames": "Yeong-Ah",
"affiliations": [
"Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Soh"
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{
"givennames": "Michele",
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
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"familyname": "Kenzelmann"
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],
"status": "published",
"keywords": [
"MARVEL",
"Heavy Fermions",
"DFT+U",
"Mixed valence"
],
"id": "1622",
"version": 1,
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"conceptrecid": "1621",
"title": "Charge fluctuations in the intermediate-valence ground state of SmCoIn\u2085",
"doi": "10.24435/materialscloud:gh-7e",
"is_last": true,
"publication_date": "Jul 14, 2023, 13:45:19",
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"license": "Creative Commons Attribution 4.0 International",
"edited_by": 53,
"description": "The microscopic mechanism of heavy band formation, relevant for unconventional superconductivity in CeCoIn\u2085 and other Ce-based heavy fermion materials, depends strongly on the efficiency with which f electrons are delocalized from the rare earth sites and participate in a Kondo lattice. Replacing Ce\u00b3\u207a (4f 1, J = 5/2) with Sm\u00b3\u207a (4f 5, J = 5/2), we show that a combination of crystal field and on-site Coulomb repulsion causes SmCoIn\u2085 to exhibit a \u03937 ground state similar to CeCoIn5 with multiple f electrons. Remarkably, we also find that with this ground state, SmCoIn\u2085 exhibits a temperature-induced valence crossover consistent with a Kondo scenario, leading to increased delocalization of f holes below a temperature scale set by the crystal field, Tv \u2248 60 K. Our result provides evidence that in the case of many f electrons, the crystal field remains the most important tuning knob in controlling the efficiency of delocalization near a heavy fermion quantum critical point, and additionally clarifies that charge fluctuations are present and may play a generally important role in the ground state of \u201c115\u201d materials.",
"references": [
{
"url": "https://doi.org/10.48550/arXiv.2307.13534",
"doi": "10.48550/arXiv.2307.13534",
"comment": "Preprint where the data is discussed",
"type": "Preprint",
"citation": "David W. Tam et.al, arXiv.2307.13534"
},
{
"url": "https://doi.org/10.1038/s42005-023-01339-1",
"doi": "10.1038/s42005-023-01339-1",
"comment": "Paper where the data is discussed",
"type": "Journal reference",
"citation": "D.W. Tam et. al, Communication Physics, 6, 223 (2023)"
}
]
},
"revision": 6
}