2011/04/21 by Akito Sakai, Satoru Nakatsuji · 235 citations
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #Conduction electron #Coupling (piping) #Crystal (programming language) #Cubic crystal system #Kondo effect #Kondo insulator #Metallurgical and Alloy Processes #Order (exchange) #Rare-earth and actinide compounds #Thermal conduction #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.80.063701
published in Journal of the Physical Society of Japan 80(6), 063701 (Physical Society of Japan) · 12 pages, 4 figures
arxiv created 2011/04/21 · openalex publication_date 2011/06/03 · arxiv updated 2015/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Our single crystal study reveals that PrTr2Al20 (Tr = Ti and V) provides the\nfirst examples of a cubic \Γ3 nonmagnetic ground doublet system that\nshows the Kondo effect including a -ln T dependent resistivity. The \Γ3\nquadrupolar moments in PrV2Al20 induce anomalous metallic behavior through\nhybridization with conduction electrons, such as T1/2 dependent resistivity\nand susceptibility below ~ 20 K down to its ordering temperature TO = 0.6 K.\nIn PrTi2Al20, however, quadrupoles are well-localized and exhibit an order at\nTO = 2.0 K. Stronger Kondo coupling in PrV2Al20 than in PrTi2Al20 suppresses\nquadrupolar ordering, and instead promotes hybridization between the \Γ3\ndoublet and conduction electrons, leading to most likely the quadrupolar Kondo\neffect.\n