2016/08/17 by P. Gegenwart, Philipp Gegenwart
Materials Science · Physics and Astronomy · #Adiabatic process #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Electron #Geometrical frustration #Grüneisen parameter #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic refrigeration #Magnetization #Physics #Quantum #Quantum mechanics #Rare-earth and actinide compounds #Thermal #Thermal conduction #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1088/0034-4885/79/11/114502
published as Rep. Prog. Phys. 79 (2016) 114502 · Review for Special Issue on Strongly Correlated Electron Systems in Reports on Progress in Physics, 16 pages, 10 figures
arxiv created 2016/08/17 · openalex publication_date 2016/10/06 · arxiv updated 2016/10/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Grüneisen parameter, experimentally determined from the ratio of thermal expansion to specific heat, quantifies the pressure dependence of characteristic energy scales of matter. It is highly enhanced for Kondo lattice systems, whose properties are strongly dependent on the pressure sensitive antiferromagnetic exchange interaction between f- and conduction electrons. In this review, we focus on the divergence of the Grüneisen parameter and its magnetic analogue, the adiabatic magnetocaloric effect, for heavy-fermion metals near quantum critical points. We compare experimental results with current theoretical models, including the effect of strong geometrical frustration. We also discuss the possibility of using materials with the divergent magnetic Grüneisen parameter for adiabatic demagnetization cooling to very low temperatures.