Quantum fluctuations in the quasi-one-dimensional non-Fermi liquid system CeCo2Ga8 investigated using μSR
| Autor: | D. T. Adroja, James S. Lord, Lu-Jia Wang, Y. G. Shi, André M. Strydom, K. Panda, Amitava Bhattacharyya, H. S. Luo |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed matter physics Relaxation (NMR) 02 engineering and technology Crystal structure Type (model theory) Muon spin spectroscopy 021001 nanoscience & nanotechnology 01 natural sciences Heat capacity Magnetic susceptibility 0103 physical sciences Fermi liquid theory 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Physical Review B. 101 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.101.214437 |
| Popis: | Reduced dimensionality offers a piece of crucial information in deciding the type of the quantum ground state in heavy fermion materials. Here we have examined the stoichiometric ${\mathrm{CeCo}}_{2}{\mathrm{Ga}}_{8}$ compound, which crystallizes in a quasi-one-dimensional crystal structure with Ga-Ce-Co chains along the $c$ axis. The low-temperature behavior of the magnetic susceptibility ($\ensuremath{\chi}\ensuremath{\sim}{T}^{\ensuremath{-}0.2}$), heat capacity (${C}_{p}/T\ensuremath{\sim}\ensuremath{-}lnT$), and resistivity ($\ensuremath{\rho}\ensuremath{\sim}{T}^{n}$ with $n\ensuremath{\sim}1$) strongly confirms the non-Fermi liquid ground state of ${\mathrm{CeCo}}_{2}{\mathrm{Ga}}_{8}$. We study the low-energy spin dynamics of the ${\mathrm{CeCo}}_{2}{\mathrm{Ga}}_{8}$ compound utilizing zero-field (ZF) and longitudinal-field muon spin relaxation ($\ensuremath{\mu}\mathrm{SR}$) measurements. ZF-$\ensuremath{\mu}\mathrm{SR}$ measurement reveals the absence of long-range magnetic ordering down to 70 mK. Interestingly, below 1 K the electronic relaxation rate rises sharply, suggesting the appearance of low-energy quantum spin fluctuations in ${\mathrm{CeCo}}_{2}{\mathrm{Ga}}_{8}$. |
| Databáze: | OpenAIRE |
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