Pregled bibliografske jedinice broj: 1112294
Dependence of transport coefficients of Yb(Rh1-xCox)(2)Si-2 intermetallics on temperature and cobalt concentration
Dependence of transport coefficients of Yb(Rh1-xCox)(2)Si-2 intermetallics on temperature and cobalt concentration // Physical review. B., 101 (2020), 15; 155146, 8 doi:10.1103/PhysRevB.101.155146 (međunarodna recenzija, članak, znanstveni)
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Naslov
Dependence of transport coefficients of Yb(Rh1-xCox)(2)Si-2 intermetallics on temperature and cobalt concentration
Autori
Zlatić, Veljko ; Stockert, Ulrike
Izvornik
Physical review. B. (2469-9950) 101
(2020), 15;
155146, 8
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
transport properties ; Yb(Rh1-xCox)(2)Si-2 ; CEF splitting ; Anderson model
Sažetak
Dependence of transport coefficients of the Yb(Rh1-xCox)(2)Si-2 series of alloys on temperature and cobalt concentration is explained by an asymmetric Anderson model which takes into account the exchange scattering of conduction electrons on ytterbium ions and the splitting of 4f states by the crystalline electric field (CEF). The substitution of rhodium by cobalt is described as an increase of chemical pressure which reduces the exchange coupling and the CEF splitting. The scaling analysis and numerical NCA solution of the model show that the effective degeneracy of the 4f state at a given temperature depends on the relative magnitude of the Kondo scale and the CEF splitting. Thus, we find that dependence of the thermopower, S(T), on temperature and cobalt concentration can be understood as an interplay of quantum fluctuations, driven by the Kondo effect, and thermal fluctuations, which favor a uniform occupation of the CEF states. The theoretical model captures all the qualitative features of the experimental data and it explains the evolution of the shape of S(T) with the increase of cobalt concentration.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
MZO-Ugovor br. 1/2014 - Novi materijali za ultrabrzu elektronsku tehnologiju zasnovanu na efektima elektronskih korelacija u dvodimenzionalnim slojevima (Aviani, Ivica, MZO - Bilateralna suradnja između Hrvatske i SAD-a) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Split
Profili:
Veljko Zlatić
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- Nature Index