YbBiPt (ytterbium-bismuth-platinum; also named YbPtBi) is an intermetallic material which at low temperatures exhibits an extremely high value of specific heat, which is a characteristic of heavy-fermion behavior. YbBiPt has a noncentrosymmetric cubic crystal structure; in particular it belongs to the ternary half-Heusler compounds.
YbBiPt was discovered by Zachary Fisk (Los Alamos National Laboratory) and coworkers in 1991 in the context of material research devoted to correlated electron systems such as heavy-fermion metals and Kondo insulators.[2][3] Then the material was studied in detail due to its unconventional properties at very low temperatures (below 1 K).
Material propertiesedit
YbBiPt crystallizes in the MgAgAs structure, which is also known as the half-Heusler structure. YbBiPt exhibits metallic behavior, e.g. continuously decreasing electrical resistivity upon cooling. The temperature dependence of the specific heat shows an anomaly at 0.4K and linear behavior at yet lower temperatures with the enormous Sommerfeld coefficient (which describes the linear-in-temperature contribution to the specific heat caused by metallic electrons) of 8J/(mol Yb K2),[2] which indicates an effective mass of the charge carriers that is extremely large even for heavy-fermion standards.
Larger contextedit
The crystal structure of YbBiPt makes it an example of the Heusler compounds,[4] more precisely of the so-called half-Heuslers which have XYZ composition.[4] In recent years, there has been a large interest in this material class due to the large variety of physical properties that can be found, and many new Heusler materials have been discovered.[4]
Referencesedit
^Ueland, B. G.; Saunders, S. M.; Bud'ko, S. L.; Schmiedeshoff, G. M.; Canfield, P. C.; Kreyssig, A.; Goldman, A. I. (2015-11-30). "High-resolution x-ray diffraction study of the heavy-fermion compound YbBiPt". Physical Review B. 92 (18). American Physical Society (APS): 184111. arXiv:1511.01822. Bibcode:2015PhRvB..92r4111U. doi:10.1103/physrevb.92.184111. ISSN 1098-0121. S2CID 119272964.
^ abFisk, Z.; et al. (1991). "Massive Electron State in YbBiPt". Phys. Rev. Lett. 67 (23): 3310–3313. Bibcode:1991PhRvL..67.3310F. doi:10.1103/PhysRevLett.67.3310. PMID 10044700. S2CID 32812392.
^Canfield, P.C.; et al. (1991). "Magnetism and heavy fermion-like behavior in the RBiPt series". J. Appl. Phys. 70 (10): 5800. Bibcode:1991JAP....70.5800C. doi:10.1063/1.350141. S2CID 55237913.
ybbipt, ytterbium, bismuth, platinum, also, named, ybptbi, intermetallic, material, which, temperatures, exhibits, extremely, high, value, specific, heat, which, characteristic, heavy, fermion, behavior, noncentrosymmetric, cubic, crystal, structure, particula. YbBiPt ytterbium bismuth platinum also named YbPtBi is an intermetallic material which at low temperatures exhibits an extremely high value of specific heat which is a characteristic of heavy fermion behavior YbBiPt has a noncentrosymmetric cubic crystal structure in particular it belongs to the ternary half Heusler compounds YbBiPt Names Other names Ytterbium bismuth platinum Identifiers Properties Chemical formula YbBiPt Structure Crystal structure Half Heusler structure MgAgAs type Space group F4 3m No 216 Lattice constant a 659 53 pm 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references Contents 1 Discovery 2 Material properties 3 Larger context 4 ReferencesDiscovery editYbBiPt was discovered by Zachary Fisk Los Alamos National Laboratory and coworkers in 1991 in the context of material research devoted to correlated electron systems such as heavy fermion metals and Kondo insulators 2 3 Then the material was studied in detail due to its unconventional properties at very low temperatures below 1 K Material properties editYbBiPt crystallizes in the MgAgAs structure which is also known as the half Heusler structure YbBiPt exhibits metallic behavior e g continuously decreasing electrical resistivity upon cooling The temperature dependence of the specific heat shows an anomaly at 0 4K and linear behavior at yet lower temperatures with the enormous Sommerfeld coefficient which describes the linear in temperature contribution to the specific heat caused by metallic electrons of 8J mol Yb K2 2 which indicates an effective mass of the charge carriers that is extremely large even for heavy fermion standards Larger context editThe crystal structure of YbBiPt makes it an example of the Heusler compounds 4 more precisely of the so called half Heuslers which have XYZ composition 4 In recent years there has been a large interest in this material class due to the large variety of physical properties that can be found and many new Heusler materials have been discovered 4 References edit Ueland B G Saunders S M Bud ko S L Schmiedeshoff G M Canfield P C Kreyssig A Goldman A I 2015 11 30 High resolution x ray diffraction study of the heavy fermion compound YbBiPt Physical Review B 92 18 American Physical Society APS 184111 arXiv 1511 01822 Bibcode 2015PhRvB 92r4111U doi 10 1103 physrevb 92 184111 ISSN 1098 0121 S2CID 119272964 a b Fisk Z et al 1991 Massive Electron State in YbBiPt Phys Rev Lett 67 23 3310 3313 Bibcode 1991PhRvL 67 3310F doi 10 1103 PhysRevLett 67 3310 PMID 10044700 S2CID 32812392 Canfield P C et al 1991 Magnetism and heavy fermion like behavior in the RBiPt series J Appl Phys 70 10 5800 Bibcode 1991JAP 70 5800C doi 10 1063 1 350141 S2CID 55237913 a b c Chadov Stanislav Qi Xiaoliang Kubler Jurgen Fecher Gerhard H Felser Claudia Zhang Shou Cheng July 2010 Tunable multifunctional topological insulators in ternary Heusler compounds Nature Materials 9 7 541 545 arXiv 1003 0193 Bibcode 2010NatMa 9 541C doi 10 1038 nmat2770 PMID 20512154 S2CID 32178219 Retrieved from https en wikipedia org w index php title YbBiPt amp oldid 1176635629, wikipedia, wiki, book, books, library,
