Charge fluctuations in the intermediate-valence ground state of SmCoInâ‚…
JSON Export
{
"revision": 6,
"id": "1622",
"created": "2023-01-18T14:47:36.205276+00:00",
"metadata": {
"doi": "10.24435/materialscloud:gh-7e",
"status": "published",
"title": "Charge fluctuations in the intermediate-valence ground state of SmCoIn\u2085",
"mcid": "2023.111",
"license_addendum": null,
"_files": [
{
"description": "Archive file containing input/output files and script needed to reproduce the simulation presented in the publication. More information in the README.txt file.",
"key": "data.tar.gz",
"size": 31847258,
"checksum": "md5:972757f4745e21859dd22b0c4fc55cb5"
},
{
"description": "Description of the files contained in the data.tar.gz archive",
"key": "README.txt",
"size": 2343,
"checksum": "md5:a35a2ba5a979d6f7cfacbad6548dd5fe"
}
],
"owner": 53,
"_oai": {
"id": "oai:materialscloud.org:1622"
},
"keywords": [
"MARVEL",
"Heavy Fermions",
"DFT+U",
"Mixed valence"
],
"conceptrecid": "1621",
"is_last": true,
"references": [
{
"type": "Preprint",
"doi": "10.48550/arXiv.2307.13534",
"url": "https://doi.org/10.48550/arXiv.2307.13534",
"comment": "Preprint where the data is discussed",
"citation": "David W. Tam et.al, arXiv.2307.13534"
},
{
"type": "Journal reference",
"doi": "10.1038/s42005-023-01339-1",
"url": "https://doi.org/10.1038/s42005-023-01339-1",
"comment": "Paper where the data is discussed",
"citation": "D.W. Tam et. al, Communication Physics, 6, 223 (2023)"
}
],
"publication_date": "Jul 14, 2023, 13:45:19",
"license": "Creative Commons Attribution 4.0 International",
"id": "1622",
"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.",
"version": 1,
"contributors": [
{
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Tam",
"givennames": "David W."
},
{
"email": "nicola.colonna@psi.ch",
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Colonna",
"givennames": "Nicola"
},
{
"affiliations": [
"Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Kumar",
"givennames": "Neeraj"
},
{
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Piamonteze",
"givennames": "Cinthia"
},
{
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Alarab",
"givennames": "Fatima"
},
{
"affiliations": [
"Photon Science Division, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Strocov",
"givennames": "Vladimir"
},
{
"affiliations": [
"Laboratory for Synchrotron Radiation - Condensed Matter, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Cervellino",
"givennames": "Antonio"
},
{
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Fennell",
"givennames": "Tom"
},
{
"affiliations": [
"Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, 5232 Villigen, Switzerland"
],
"familyname": "Gawryluk",
"givennames": "Dariusz Jakub"
},
{
"affiliations": [
"Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, 5232 Villigen, Switzerland"
],
"familyname": "Pomjakushina",
"givennames": "Ekaterina"
},
{
"affiliations": [
"Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Soh",
"givennames": "Yeong-Ah"
},
{
"affiliations": [
"Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen, Switzerland"
],
"familyname": "Kenzelmann",
"givennames": "Michele"
}
],
"edited_by": 53
},
"updated": "2023-09-13T07:15:01.391825+00:00"
}