Anomalous specific heat behaviour in the quadrupolar Kondo system PrV2Al20

Abstract

We have measured the specific heat of PrV${}_2$Al${}_{20}$ at very low temperatures, using high quality single crystals with the residual resistivity ratio ~ 20. The high-quality single crystals exhibit clear double transitions at $T_{\mathrm{Q}}=$ 0.75 K and $T^{\ast }=$ 0.65 K. These transitions are clearer and shift to higher temperature in higher quality single crystals. Besides, there was no hysteresis in those transitions in warming and cooling process of the heat capacity measurements. In the ordered state below $T^{\ast }$, the specific heat shows a $T^4$ dependence, indicating the gapless mode associated with the quadrupole and/or octupole ordering.

arXiv comment6 pages, 2 figures

References in corpus (9)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Kondo Effects and Multipolar Order in the cubic PrTr2Al20 (Tr=Ti, V)
• Quantum Criticality without Tuning in the Mixed Valence Compound beta-YbAlB4
• Heavy Fermion Superconductivity in the Quadrupole Ordered State of PrV2Al20
• Superconductivity in the Ferroquadrupolar State in the Quadrupolar Kondo Lattice PrTi${}_2$Al${}_{20}$
• Observation of Modulated Quadrupolar Structures in PrPb3
• Ferro-quadrupolar ordering in PrTi${}_2$Al${}_{20}$
• Kondo Resonance in PrTi2Al20: Photoemission spectroscopy and single-impurity Anderson model

Cited by in corpus (6)

• Landau theory of multipolar orders in Pr(TM)${}_2$X${}_{20}$ Kondo materials
• Field-induced Ferrohastatic Order in Cubic Non-Kramers Doublet Systems
• Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV${}_2$Al${}_{20}$
• Proposal for methods to measure the octupole susceptibility
• First-principles Study of the RKKY Interaction and the Quadrupole Order in the Pr 1-2-20 systems PrT2Al20 (T=Ti, V)
• Strange-metal behavior without fine-tuning in PrV2Al20