{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:18:58Z","timestamp":1790763538564,"version":"4.1.0"},"reference-count":49,"publisher":"IOP Publishing","issue":"3","license":[{"start":{"date-parts":[[2024,6,20]],"date-time":"2024-06-20T00:00:00Z","timestamp":1718841600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,6,20]],"date-time":"2024-06-20T00:00:00Z","timestamp":1718841600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"DOI":"10.13039\/501100000266","name":"EPSRC","doi-asserted-by":"crossref","award":["EP\/M003752\/1"],"award-info":[{"award-number":["EP\/M003752\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100005299","name":"Vicerrector\u00eda de Investigaci\u00f3n, Universidad de Costa Rica","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100005299","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100000288","name":"Royal Society","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000288","id-type":"DOI","asserted-by":"crossref"}]},{"name":"ERC","award":["680032"],"award-info":[{"award-number":["680032"]}]}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["J. Phys. Energy"],"published-print":{"date-parts":[[2024,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>We present a minimal Landau theory of plastic-to-crystal phase transitions in which the key components are a multipole-moment order parameter that describes the orientational ordering of the constituent molecules, coupling between such order parameter and elastic strains, and thermal expansion. We illustrate the theory with the simplest non-trivial model in which the orientational ordering is described by a quadrupole moment, and use such model to calculate barocaloric effects in plastic crystals that are driven by hydrostatic pressure. The model captures characteristic features of plastic-to-crystal phase transitions, namely large changes in volume and entropy at the transition, as well as the linear dependence of the transition temperature with pressure. We identify temperature regions in the barocaloric response associated with the individual plastic and crystal phases, and those involving the phase transition. Our model is in overall agreement with previous experiments in powdered samples of fullerite C<jats:sub>60<\/jats:sub>, and predicts peak isothermal entropy changes of <jats:inline-formula>\n                     <jats:tex-math\/>\n                     <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                           <mml:mrow>\n                              <mml:mo>\u223c<\/mml:mo>\n                           <\/mml:mrow>\n                           <mml:mn>90<\/mml:mn>\n                           <mml:mstyle scriptlevel=\"0\"\/>\n                           <mml:mrow>\n                              <mml:mi mathvariant=\"normal\">J<\/mml:mi>\n                              <mml:msup>\n                                 <mml:mi mathvariant=\"normal\">K<\/mml:mi>\n                                 <mml:mrow>\n                                    <mml:mo>\u2212<\/mml:mo>\n                                    <mml:mn>1<\/mml:mn>\n                                 <\/mml:mrow>\n                              <\/mml:msup>\n                              <mml:msup>\n                                 <mml:mi>kg<\/mml:mi>\n                                 <mml:mrow>\n                                    <mml:mo>\u2212<\/mml:mo>\n                                    <mml:mn>1<\/mml:mn>\n                                 <\/mml:mrow>\n                              <\/mml:msup>\n                           <\/mml:mrow>\n                        <\/mml:mrow>\n                     <\/mml:math>\n                  <\/jats:inline-formula> and peak adiabatic temperature changes of <jats:inline-formula>\n                     <jats:tex-math\/>\n                     <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                           <mml:mrow>\n                              <mml:mo>\u223c<\/mml:mo>\n                           <\/mml:mrow>\n                           <mml:mn>35<\/mml:mn>\n                           <mml:mstyle scriptlevel=\"0\"\/>\n                           <mml:mrow>\n                              <mml:mi mathvariant=\"normal\">K<\/mml:mi>\n                           <\/mml:mrow>\n                        <\/mml:mrow>\n                     <\/mml:math>\n                  <\/jats:inline-formula> under <jats:inline-formula>\n                     <jats:tex-math\/>\n                     <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                           <mml:mn>0.60<\/mml:mn>\n                           <mml:mstyle scriptlevel=\"0\"\/>\n                        <\/mml:mrow>\n                     <\/mml:math>\n                  <\/jats:inline-formula>GPa at <jats:inline-formula>\n                     <jats:tex-math\/>\n                     <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                           <mml:mn>265<\/mml:mn>\n                           <mml:mstyle scriptlevel=\"0\"\/>\n                        <\/mml:mrow>\n                     <\/mml:math>\n                  <\/jats:inline-formula>K in fullerite single crystals.<\/jats:p>","DOI":"10.1088\/2515-7655\/ad4590","type":"journal-article","created":{"date-parts":[[2024,6,20]],"date-time":"2024-06-20T09:59:26Z","timestamp":1718877566000},"page":"035003","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Landau theory of barocaloric plastic crystals"],"prefix":"10.1088","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-2173-0403","authenticated-orcid":false,"given":"R","family":"Mar\u00edn-Delgado","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0276-1981","authenticated-orcid":false,"given":"X","family":"Moya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2922-1723","authenticated-orcid":true,"given":"G G","family":"Guzm\u00e1n-Verri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2024,6,20]]},"reference":[{"key":"jpenergyad4590bib1","doi-asserted-by":"publisher","first-page":"797","DOI":"10.1126\/science.abb0973","article-title":"Caloric materials for cooling and 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Published by IOP Publishing Ltd","name":"copyright_information","label":"Copyright Information"},{"value":"2023-09-05","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-04-30","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-06-20","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}