Quantum fluctuations in the quasi-one-dimensional non-Fermi liquid system CeCo2Ga8 investigated using μSR

被引：13

作者：

Bhattacharyya, A. ^{[1
]}

Adroja, D. T. ^{[2
,3
]}

Lord, J. S. ^{[2
]}

Wang, L. ^{[4
,5
]}

Shi, Y. ^{[4
,5
,6
]}

Panda, K. ^{[1
]}

Luo, H. ^{[4
,5
,6
]}

Strydom, A. M. ^{[3
]}

机构：

[1] Ramakrishna Mission Vivekananda Educ & Res Inst, Dept Phys, Howrah 711202, W Bengal, India

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] Univ Johannesburg, Highly Correlated Matter Res Grp, Phys Dept, POB 524, ZA-2006 Auckland Pk, South Africa

[4] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China

[6] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 21期

基金：

新加坡国家研究基金会; 中国国家自然科学基金; 北京市自然科学基金;

关键词：

CRITICAL-POINT; BEHAVIOR; CRITICALITY; FIELD;

D O I：

10.1103/PhysRevB.101.214437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 CeCo2Ga8 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 (chi similar to T-0.2), heat capacity (C-p/T similar to - ln T), and resistivity (rho similar to T-n with n similar to 1) strongly confirms the non-Fermi liquid ground state of CeCo2Ga8. We study the low-energy spin dynamics of the CeCo2Ga8 compound utilizing zero-field (ZF) and longitudinal-field muon spin relaxation (mu SR) measurements. ZF-mu 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 CeCo2Ga8.

引用

页数：6

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