{"id":"https://openalex.org/W2076044575","doi":"https://doi.org/10.1103/physrevb.18.3282","title":"Far-infrared frequency dependence of the ac Josephson effect in niobium point contacts","display_name":"Far-infrared frequency dependence of the ac Josephson effect in niobium point contacts","publication_year":1978,"publication_date":"1978-10-01","ids":{"openalex":"https://openalex.org/W2076044575","doi":"https://doi.org/10.1103/physrevb.18.3282","mag":"2076044575"},"language":"en","primary_location":{"id":"doi:10.1103/physrevb.18.3282","doi":"https://doi.org/10.1103/physrevb.18.3282","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevb.18.3282","pdf_url":null,"source":{"id":"https://openalex.org/S4210174675","display_name":"Physical review. B, Condensed matter","issn_l":"0163-1829","issn":["0163-1829","1095-3795"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","ki-jl-2"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review B","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5038905661","display_name":"David A. Weitz","orcid":"https://orcid.org/0000-0001-6678-5208","observed_orcids":["https://orcid.org/0000-0001-6678-5208","https://orcid.org/0000-0001-6299-1194"]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"D. A. Weitz","raw_affiliation_strings":["Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5029756915","display_name":"William J. Skocpol","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"W. J. Skocpol","raw_affiliation_strings":["Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5107835941","display_name":"M. Tinkham","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"M. Tinkham","raw_affiliation_strings":["Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138","institution_ids":["https://openalex.org/I136199984"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I136199984"],"apc_list":null,"apc_paid":null,"fwci":2.1156,"has_fulltext":false,"cited_by_count":21,"citation_normalized_percentile":{"value":0.86530704,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"18","issue":"7","first_page":"3282","last_page":"3292"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10037","display_name":"Physics of Superconductivity and Magnetism","score":0.9160000085830688,"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/T10037","display_name":"Physics of Superconductivity and Magnetism","score":0.9160000085830688,"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/T11803","display_name":"Superconducting and THz Device Technology","score":0.06040000170469284,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"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/T12300","display_name":"Advanced Electrical Measurement Techniques","score":0.004900000058114529,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/ac-josephson-effect","display_name":"ac Josephson effect","score":0.9929999709129333},{"id":"https://openalex.org/keywords/niobium","display_name":"niobium","score":0.7900000214576721},{"id":"https://openalex.org/keywords/point-contacts","display_name":"point contacts","score":0.8230000138282776},{"id":"https://openalex.org/keywords/tunnel-junctions","display_name":"tunnel junctions","score":0.8009999990463257},{"id":"https://openalex.org/keywords/current-voltage-characteristics","display_name":"current-voltage characteristics","score":0.5979999899864197},{"id":"https://openalex.org/keywords/superconductivity","display_name":"superconductivity","score":0.5849999785423279}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.7703608870506287},{"id":"https://openalex.org/C12038964","wikidata":"https://www.wikidata.org/wiki/Q764228","display_name":"Josephson effect","level":3,"score":0.7495302557945251},{"id":"https://openalex.org/C26873012","wikidata":"https://www.wikidata.org/wiki/Q214781","display_name":"Condensed matter physics","level":1,"score":0.6298810839653015},{"id":"https://openalex.org/C165801399","wikidata":"https://www.wikidata.org/wiki/Q25428","display_name":"Voltage","level":2,"score":0.5157544612884521},{"id":"https://openalex.org/C20254490","wikidata":"https://www.wikidata.org/wiki/Q719550","display_name":"Biasing","level":3,"score":0.5146768689155579},{"id":"https://openalex.org/C507968137","wikidata":"https://www.wikidata.org/wiki/Q1046","display_name":"Niobium","level":2,"score":0.5074774622917175},{"id":"https://openalex.org/C54101563","wikidata":"https://www.wikidata.org/wiki/Q124131","display_name":"Superconductivity","level":2,"score":0.49359118938446045},{"id":"https://openalex.org/C180205008","wikidata":"https://www.wikidata.org/wiki/Q159190","display_name":"Amplitude","level":2,"score":0.4826000928878784},{"id":"https://openalex.org/C30066665","wikidata":"https://www.wikidata.org/wiki/Q164399","display_name":"Capacitance","level":3,"score":0.47245123982429504},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.472166508436203},{"id":"https://openalex.org/C2776029896","wikidata":"https://www.wikidata.org/wiki/Q3935810","display_name":"Relaxation (psychology)","level":2,"score":0.42017343640327454},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.3532562851905823},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.2757100462913513},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.2032160460948944},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.13755816221237183},{"id":"https://openalex.org/C17525397","wikidata":"https://www.wikidata.org/wiki/Q176140","display_name":"Electrode","level":2,"score":0.0},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","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},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.0},{"id":"https://openalex.org/C77805123","wikidata":"https://www.wikidata.org/wiki/Q161272","display_name":"Social psychology","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1103/physrevb.18.3282","doi":"https://doi.org/10.1103/physrevb.18.3282","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevb.18.3282","pdf_url":null,"source":{"id":"https://openalex.org/S4210174675","display_name":"Physical review. B, Condensed matter","issn_l":"0163-1829","issn":["0163-1829","1095-3795"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","ki-jl-2"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review B","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"sustainable_development_goals_aurora":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.8500000238418579}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W1964400389","https://openalex.org/W1967561804","https://openalex.org/W1977965732","https://openalex.org/W2013884275","https://openalex.org/W2014264184","https://openalex.org/W2021260098","https://openalex.org/W2022842343","https://openalex.org/W2025625787","https://openalex.org/W2028194301","https://openalex.org/W2028982883","https://openalex.org/W2032371442","https://openalex.org/W2033830916","https://openalex.org/W2037344265","https://openalex.org/W2038264067","https://openalex.org/W2042528213","https://openalex.org/W2045009147","https://openalex.org/W2049337708","https://openalex.org/W2050134401","https://openalex.org/W2053235314","https://openalex.org/W2057202762","https://openalex.org/W2057783198","https://openalex.org/W2060471264","https://openalex.org/W2061484039","https://openalex.org/W2064646486","https://openalex.org/W2067004388","https://openalex.org/W2071380261","https://openalex.org/W2074689366","https://openalex.org/W2075778908","https://openalex.org/W2081814660","https://openalex.org/W2090613772","https://openalex.org/W2091056263","https://openalex.org/W2121151084","https://openalex.org/W2138995333","https://openalex.org/W2566706182","https://openalex.org/W4245354677"],"related_works":["https://openalex.org/W2037251328","https://openalex.org/W2053235314","https://openalex.org/W2067004388","https://openalex.org/W2049337708","https://openalex.org/W2000426898","https://openalex.org/W1988493905","https://openalex.org/W1980518106","https://openalex.org/W2007912403","https://openalex.org/W2057333541","https://openalex.org/W1996069430"],"abstract_inverted_index":{"We":[0,36],"have":[1,21],"measured":[2],"the":[3,8,11,38,44,65,70,76,79,83,98,102,106,114,119,123,144,165,168,178,184,187,192],"far-infrared":[4,52],"frequency":[5],"dependence":[6,81],"of":[7,10,78,82,105,122,129,146,149,167,183,186],"strength":[9,185],"ac":[12,188],"Josephson":[13,40,189],"effect":[14,190],"in":[15,97],"Nb":[16],"cat-whisker":[17],"point":[18],"contacts,":[19],"which":[20],"consistent":[22],"and":[23,26,34],"reproducible":[24],"behavior":[25],"minimal":[27],"extrinsic":[28],"high-frequency":[29],"limitations":[30],"due":[31],"to":[32,58,62,118,153,164],"capacitance":[33],"heating.":[35],"monitor":[37],"constant-voltage":[39],"steps":[41,107],"induced":[42],"on":[43],"dc":[45],"$I\\ensuremath{-}V$":[46,120],"curves":[47,121],"by":[48,90,113,136],"an":[49],"optically":[50],"pumped":[51],"laser":[53],"at":[54,159,172],"fundamental":[55],"frequencies":[56,71,161],"corresponding":[57],"voltages":[59],"from":[60,155],"\\ensuremath{\\sim}0.2":[61],"\\ensuremath{\\sim}2":[63],"times":[64],"energy-gap":[66],"voltage.":[67],"At":[68],"all":[69],"studied,":[72],"we":[73,125],"find":[74,126],"that":[75,127],"shape":[77],"power":[80],"step":[84],"amplitudes":[85],"is":[86,108],"fit":[87],"reasonably":[88],"well":[89],"Werthamer's":[91],"frequency-dependent":[92],"theory":[93],"for":[94,135],"tunnel":[95],"junctions":[96],"voltage-bias":[99],"approximation.":[100],"However,":[101],"observed":[103],"magnitude":[104],"considerably":[109],"less":[110],"than":[111],"predicted":[112],"theory.":[115],"By":[116],"fitting":[117],"steps,":[124],"some":[128],"this":[130],"discrepancy":[131],"can":[132],"be":[133],"accounted":[134],"heating-enhanced":[137],"noise":[138],"rounding.":[139],"The":[140],"remaining":[141],"discrepancies":[142],"(of":[143],"order":[145],"a":[147,156],"factor":[148],"2)":[150],"are":[151],"attributed":[152],"departures":[154],"voltage":[157],"bias":[158],"low":[160],"and,":[162],"tentatively,":[163],"effects":[166],"Ginzburg-Landau":[169],"relaxation":[170],"time":[171],"higher":[173],"voltages.":[174],"Our":[175],"data":[176],"confirm":[177],"expected":[179],"intrinsic":[180],"roll":[181],"off":[182],"above":[191],"energy":[193],"gap.":[194]},"counts_by_year":[],"updated_date":"2026-10-01T08:54:57.152042","created_date":"2016-06-24T00:00:00"}