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Quantum-critical phase out of frustrated magnetism in a strongly correlated metal
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- Strange-metal phenomena often develop at the border of antiferromagnetic order in strongly correlated metals. It has been well established that they can originate from the fluctuations anchored by the point of continuous quantum phase transition out of the antiferromagnetic order, i.e., a quantum critical point. What has been unclear is how these phenomena can be associated with a potential new phase of matter at zero temperature. Here we show that magnetic frustration of the 4f-local moments in the distorted Kagome intermetallic compound CePdAl gives rise to such a paramagnetic quantum-critical phase. Moreover, we demonstrate that this phase turns into a Fermi liquid through a Mott-like crossover; in a two-dimensional parameter space of pressure and magnetic field, this crossover is linked to a line of zero-temperature 4f-electron localization-delocalization phase transitions at low and moderate pressures. Our discovery motivates a new design principle for strongly correlated metallic states with unconventional excitations that may underlie the development of such effects as high temperature superconductivity.<br />Comment: 13 pages, 4 figures
- Subjects :
- Quantum phase transition
Physics
Condensed matter physics
Strongly Correlated Electrons (cond-mat.str-el)
Magnetism
media_common.quotation_subject
Intermetallic
General Physics and Astronomy
Frustration
FOS: Physical sciences
01 natural sciences
010305 fluids & plasmas
Condensed Matter - Strongly Correlated Electrons
Paramagnetism
Phase (matter)
0103 physical sciences
Antiferromagnetism
ddc:530
Condensed Matter::Strongly Correlated Electrons
010306 general physics
Quantum
media_common
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....98fb8c34bde207d23e83869cff5b29c0
- Full Text :
- https://doi.org/10.48550/arxiv.1907.04255