Journal
SCIENCE
Volume 339, Issue 6122, Pages 933-936Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1230583
Keywords
-
Categories
Funding
- DFG Research Unit 960 Quantum Phase Transitions
Ask authors/readers for more resources
Unconventional superconductivity and other previously unknown phases of matter exist in the vicinity of a quantum critical point (QCP): a continuous phase change of matter at absolute zero. Intensive theoretical and experimental investigations on itinerant systems have shown that metallic ferromagnets tend to develop via either a first-order phase transition or through the formation of intermediate superconducting or inhomogeneous magnetic phases. Here, through precision low-temperature measurements, we show that the Gruneisen ratio of the heavy fermion metallic ferromagnet YbNi4(P0.92As0.08)(2) diverges upon cooling to T = 0, indicating a ferromagnetic QCP. Our observation that this kind of instability, which is forbidden in d-electron metals, occurs in a heavy fermion system will have a large impact on the studies of quantum critical materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available