{"id":"https://openalex.org/W1986134604","doi":"https://doi.org/10.1088/0953-2048/20/7/012","title":"Limiting factors of normal-state conductivity in superconducting MgB2: an application of mean-field theory for a site percolation problem","display_name":"Limiting factors of normal-state conductivity in superconducting MgB2: an application of mean-field theory for a site percolation problem","publication_year":2007,"publication_date":"2007-06-04","ids":{"openalex":"https://openalex.org/W1986134604","doi":"https://doi.org/10.1088/0953-2048/20/7/012","mag":"1986134604"},"language":"en","primary_location":{"id":"doi:10.1088/0953-2048/20/7/012","doi":"https://doi.org/10.1088/0953-2048/20/7/012","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0953-2048/20/7/012","pdf_url":"https://iopscience.iop.org/article/10.1088/0953-2048/20/7/012/pdf","source":{"id":"https://openalex.org/S93909106","display_name":"Superconductor Science and Technology","issn_l":"0953-2048","issn":["0953-2048","1361-6668"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Superconductor Science and Technology","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://iopscience.iop.org/article/10.1088/0953-2048/20/7/012/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5055256393","display_name":"Akiyasu Yamamoto","orcid":"https://orcid.org/0000-0001-6346-3422","observed_orcids":["https://orcid.org/0000-0001-6346-3422"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Akiyasu Yamamoto","raw_affiliation_strings":["Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110092285","display_name":"Jun\u2010ichi Shimoyama","orcid":"https://orcid.org/0009-0007-1783-676X","observed_orcids":["https://orcid.org/0009-0007-1783-676X"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Jun-ichi Shimoyama","raw_affiliation_strings":["Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5043970389","display_name":"Kohji Kishio","orcid":"https://orcid.org/0000-0002-2759-8618","observed_orcids":["https://orcid.org/0000-0002-2759-8618"]},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kohji Kishio","raw_affiliation_strings":["Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8586, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo#N#113-8586,#N#Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103016404","display_name":"Teruo Matsushita","orcid":"https://orcid.org/0000-0003-4013-1294","observed_orcids":["https://orcid.org/0000-0003-4013-1294"]},"institutions":[{"id":"https://openalex.org/I207014233","display_name":"Kyushu Institute of Technology","ror":"https://ror.org/02278tr80","country_code":"JP","type":"education","lineage":["https://openalex.org/I207014233"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Teruo Matsushita","raw_affiliation_strings":["Department of Computer Science and Electronics, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 820-8502, Japan","Department of Computer Science and Electronics, Kyushu Institute of Technology, 680-4#N#Kawazu, Iizuka 820-8502,#N#Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Electronics, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 820-8502, Japan","institution_ids":["https://openalex.org/I207014233"]},{"raw_affiliation_string":"Department of Computer Science and Electronics, Kyushu Institute of Technology, 680-4#N#Kawazu, Iizuka 820-8502,#N#Japan","institution_ids":["https://openalex.org/I207014233"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3325,"currency":"USD","value_usd":3325},"apc_paid":null,"fwci":10.2233,"has_fulltext":true,"cited_by_count":145,"citation_normalized_percentile":{"value":0.98964276,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":99},"biblio":{"volume":"20","issue":"7","first_page":"658","last_page":"666"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12491","display_name":"Superconductivity in MgB2 and Alloys","score":1.0,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12491","display_name":"Superconductivity in MgB2 and Alloys","score":1.0,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11808","display_name":"Superconducting Materials and Applications","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11341","display_name":"Boron and Carbon Nanomaterials Research","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/mgb2","display_name":"MgB2","score":0.9449999928474426},{"id":"https://openalex.org/keywords/normal-state-conductivity","display_name":"normal-state conductivity","score":0.9430000185966492},{"id":"https://openalex.org/keywords/site-percolation","display_name":"site percolation","score":0.8209999799728394},{"id":"https://openalex.org/keywords/packing-factor","display_name":"packing factor","score":0.8149999976158142},{"id":"https://openalex.org/keywords/polycrystalline-superconductors","display_name":"polycrystalline superconductors","score":0.8529999852180481},{"id":"https://openalex.org/keywords/grain-boundary-impurities","display_name":"grain boundary impurities","score":0.6759999990463257},{"id":"https://openalex.org/keywords/electrical-connectivity","display_name":"electrical connectivity","score":0.6909999847412109},{"id":"https://openalex.org/keywords/grain-anisotropy","display_name":"grain anisotropy","score":0.7919999957084656},{"id":"https://openalex.org/keywords/weak-links","display_name":"weak links","score":0.5019999742507935},{"id":"https://openalex.org/keywords/mean-field-theory","display_name":"mean-field theory","score":0.7760000228881836}],"concepts":[{"id":"https://openalex.org/C26873012","wikidata":"https://www.wikidata.org/wiki/Q214781","display_name":"Condensed matter physics","level":1,"score":0.7966070771217346},{"id":"https://openalex.org/C85725439","wikidata":"https://www.wikidata.org/wiki/Q466686","display_name":"Anisotropy","level":2,"score":0.729517936706543},{"id":"https://openalex.org/C69990965","wikidata":"https://www.wikidata.org/wiki/Q65402698","display_name":"Electrical resistivity and conductivity","level":2,"score":0.7104074358940125},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.7090926766395569},{"id":"https://openalex.org/C2780457167","wikidata":"https://www.wikidata.org/wiki/Q17156484","display_name":"Percolation (cognitive psychology)","level":2,"score":0.6934133172035217},{"id":"https://openalex.org/C54101563","wikidata":"https://www.wikidata.org/wiki/Q124131","display_name":"Superconductivity","level":2,"score":0.6866241693496704},{"id":"https://openalex.org/C137637335","wikidata":"https://www.wikidata.org/wiki/Q899604","display_name":"Crystallite","level":2,"score":0.6791412830352783},{"id":"https://openalex.org/C131540310","wikidata":"https://www.wikidata.org/wiki/Q907564","display_name":"Conductivity","level":2,"score":0.5282796025276184},{"id":"https://openalex.org/C47908070","wikidata":"https://www.wikidata.org/wiki/Q900515","display_name":"Grain boundary","level":3,"score":0.5125841498374939},{"id":"https://openalex.org/C110161667","wikidata":"https://www.wikidata.org/wiki/Q495460","display_name":"Atomic packing factor","level":2,"score":0.5105375051498413},{"id":"https://openalex.org/C11557063","wikidata":"https://www.wikidata.org/wiki/Q900918","display_name":"Percolation theory","level":3,"score":0.4897341728210449},{"id":"https://openalex.org/C2729557","wikidata":"https://www.wikidata.org/wiki/Q7167170","display_name":"Percolation threshold","level":3,"score":0.4876185953617096},{"id":"https://openalex.org/C12997251","wikidata":"https://www.wikidata.org/wiki/Q567560","display_name":"Anomaly (physics)","level":2,"score":0.4875328242778778},{"id":"https://openalex.org/C71987851","wikidata":"https://www.wikidata.org/wiki/Q7216430","display_name":"Impurity","level":2,"score":0.4745013415813446},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.16848331689834595},{"id":"https://openalex.org/C46141821","wikidata":"https://www.wikidata.org/wiki/Q209402","display_name":"Nuclear magnetic resonance","level":1,"score":0.14749565720558167},{"id":"https://openalex.org/C87976508","wikidata":"https://www.wikidata.org/wiki/Q1498213","display_name":"Microstructure","level":2,"score":0.07328024506568909},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.07255330681800842},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C169760540","wikidata":"https://www.wikidata.org/wiki/Q207011","display_name":"Neuroscience","level":1,"score":0.0},{"id":"https://openalex.org/C191897082","wikidata":"https://www.wikidata.org/wiki/Q11467","display_name":"Metallurgy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1088/0953-2048/20/7/012","doi":"https://doi.org/10.1088/0953-2048/20/7/012","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0953-2048/20/7/012","pdf_url":"https://iopscience.iop.org/article/10.1088/0953-2048/20/7/012/pdf","source":{"id":"https://openalex.org/S93909106","display_name":"Superconductor Science and Technology","issn_l":"0953-2048","issn":["0953-2048","1361-6668"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Superconductor Science and Technology","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1088/0953-2048/20/7/012","doi":"https://doi.org/10.1088/0953-2048/20/7/012","is_oa":true,"landing_page_url":"https://doi.org/10.1088/0953-2048/20/7/012","pdf_url":"https://iopscience.iop.org/article/10.1088/0953-2048/20/7/012/pdf","source":{"id":"https://openalex.org/S93909106","display_name":"Superconductor Science and Technology","issn_l":"0953-2048","issn":["0953-2048","1361-6668"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Superconductor Science and Technology","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320334764","display_name":"Japan Society for the Promotion of Science","ror":"https://ror.org/00hhkn466"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1986134604.pdf","grobid_xml":"https://content.openalex.org/works/W1986134604.grobid-xml"},"referenced_works_count":24,"referenced_works":["https://openalex.org/W1572255055","https://openalex.org/W1635730111","https://openalex.org/W1866209078","https://openalex.org/W1971812548","https://openalex.org/W1975914197","https://openalex.org/W1988473977","https://openalex.org/W2001647921","https://openalex.org/W2013210149","https://openalex.org/W2014782814","https://openalex.org/W2018278034","https://openalex.org/W2023455219","https://openalex.org/W2029801125","https://openalex.org/W2030656777","https://openalex.org/W2036588291","https://openalex.org/W2037819275","https://openalex.org/W2048350705","https://openalex.org/W2049565490","https://openalex.org/W2067149892","https://openalex.org/W2073570030","https://openalex.org/W2077885033","https://openalex.org/W2078710135","https://openalex.org/W2083824208","https://openalex.org/W2107642984","https://openalex.org/W4236949229"],"related_works":["https://openalex.org/W2051649797","https://openalex.org/W2007778068","https://openalex.org/W2089588584","https://openalex.org/W2154331695","https://openalex.org/W2038485746","https://openalex.org/W2006258825","https://openalex.org/W2028816726","https://openalex.org/W1989687552","https://openalex.org/W2791773468","https://openalex.org/W2025488077"],"abstract_inverted_index":{"Normal-state":[0],"conductivity":[1],"in":[2,70,102,113],"polycrystalline":[3,103],"MgB":[4,71,116],"2":[5,72,117],"bulk":[6],"samples":[7,50],"having":[8],"a":[9,122,125],"systematically":[10],"varied":[11],"packing":[12,17,46],"factor":[13,18],"was":[14,32],"studied.":[15],"The":[16,44,105],"dependence":[19],"of":[20,48,66,79,88,99,124],"phonon":[21],"term":[22],"resistivity":[23,82],"\u0394\u03c1(":[24],"T":[25,29],")":[26],"=":[27],"\u03c1(":[28],")\u2212\u03c1":[30],"0":[31],"found":[33],"to":[34,61],"be":[35,62,119],"well":[36],"explained":[37],"by":[38],"the":[39,49,52,63,80,84,86,89,97,100,109],"three-dimensional":[40],"site":[41],"percolation":[42,126],"model.":[43],"low":[45],"density":[47],"and":[51,96],"wet":[53],"impurity":[54],"phases":[55],"at":[56],"grain":[57],"boundaries":[58],"are":[59],"suggested":[60],"main":[64],"causes":[65],"poor":[67],"electrical":[68],"connectivity":[69,112],".":[73],"Our":[74],"model":[75,106],"enables":[76],"quantitative":[77],"evaluations":[78],"intrinsic":[81],"inside":[83],"grains,":[85],"fraction":[87],"active":[90],"grains":[91,101],"that":[92,108],"can":[93,118],"carry":[94],"current":[95],"anisotropy":[98],"samples.":[104],"predicts":[107],"anomaly":[110],"suppressed":[111],"rather":[114],"weak-link-free":[115],"understood":[120],"under":[121],"scenario":[123],"problem.":[127]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":5},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":11},{"year":2021,"cited_by_count":4},{"year":2020,"cited_by_count":8},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":6},{"year":2017,"cited_by_count":5},{"year":2016,"cited_by_count":10},{"year":2015,"cited_by_count":6},{"year":2014,"cited_by_count":14},{"year":2013,"cited_by_count":10},{"year":2012,"cited_by_count":7}],"updated_date":"2026-11-10T11:39:43.021295","created_date":"2016-06-24T00:00:00"}