Search for pressure-induced quantum criticality in YbFe2Zn20

TitleSearch for pressure-induced quantum criticality in YbFe2Zn20
Publication TypeJournal Article
Year of Publication2013
AuthorsKim SK, Torikachvili MS, Budko SL, Canfield PC
Journal TitlePhysical Review B
Date Published07
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000321838300001
Keywordsdependence, ELECTRICAL-RESISTIVITY, fermi-liquid behavior, fluorinert, gpa, hydrostatic limits, kondo-lattice, superconductivity, systems, temperature

Electrical transportmeasurements of the heavy-fermion compound YbFe2Zn20 were carried out under pressures up to 8.23 GPa and down to temperatures of nearly 0.3 K. The pressure dependence of the low-temperature Fermi-liquid state was assessed by fitting rho(T) = rho(0) + AT(n) with n = 2 for T < T-FL. Power-law analysis of the low-temperature resistivities indicates n = 2 over a broad temperature range for P less than or similar to 5 GPa. However, at higher pressures, the quadratic temperature dependence is only seen at the very lowest temperatures, and instead shows a wider range of n < 2 power-law behavior in the low-temperature resistivities. As pressure was increased, T-FL diminished from similar to 11 K at ambient pressure to similar to 0.6 K at 8.23 GPa. Over the same pressure range, the A parameter increased dramatically with a functional form of A proportional to (P -P-c)(-2) with P-c similar or equal to 9.8 GPa being the critical pressure for a possible quantum critical point.

URL<Go to ISI>://WOS:000321838300001