Uniaxial stress effect on quasi-one-dimensional Kondo lattice CeCo 2 Ga 8
Quantum critical phenomena in the quasi-one-dimensional limit remain an open issue. We report the uniaxial stress effect on the quasi-one-dimensional Kondo lattice CeCo 2 Ga 8 by electric transport and AC heat capacity measurements. CeCo 2 Ga 8 is speculated to sit in close vicinity but on the quant...
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Veröffentlicht in: | Chinese physics B 2022-06, Vol.31 (6), p.67104 |
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Hauptverfasser: | , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Quantum critical phenomena in the quasi-one-dimensional limit remain an open issue. We report the uniaxial stress effect on the quasi-one-dimensional Kondo lattice CeCo
2
Ga
8
by electric transport and AC heat capacity measurements. CeCo
2
Ga
8
is speculated to sit in close vicinity but on the quantum-disordered side of a quantum critical point. Upon compressing the
c
axis, parallel to the Ce–Ce chain, the onset of coherent Kondo effect is enhanced. In contrast, the electronic specific heat diverges more rapidly at low temperature when the intra-chain distance is elongated by compressions along
a
or
b
axis. These results suggest that a tensile intra-chain strain (
ε
c
> 0) pushes CeCo
2
Ga
8
closer to the quantum critical point, while a compressive intra-chain strain (
ε
c
> 0) likely causes departure. Our work provides a rare paradigm of manipulation near a quantum critical point in a quasi-1D Kondo lattice by uniaxial stress, and paves the way for further investigations on the unique feature of quantum criticality in the quasi-1D limit. |
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ISSN: | 1674-1056 |
DOI: | 10.1088/1674-1056/ac6339 |