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Title: Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo 2Ga 8

Dimensionality plays an essential role in determining the anomalous non-Fermi liquid properties in heavy fermion systems. So far most heavy fermion compounds are quasi-two-dimensional or three-dimensional. Here we report the synthesis and systematic investigations of the single crystals of the quasi-one-dimensional Kondo lattice CeCo 2Ga 8. Resistivity measurements at ambient pressure reveal the onset of coherence at T * ≈ 20 K and non-Fermi liquid behavior with linear temperature dependence over a decade in temperature from 2 to 0.1 K. The specific heat increases logarithmically with lowering temperature between 10 and 2 K and reaches 800 mJ/mol K 2 at 1 K, suggesting that CeCo 2Ga 8 is a heavy fermion compound in the close vicinity of a quantum critical point. Resistivity measurements under pressure further confirm the non-Fermi liquid behavior in a large temperature–pressure range. The magnetic susceptibility is found to follow the typical behavior for a one-dimensional spin chain from 300 K down to T *, and first-principles calculations predict flat Fermi surfaces for the itinerant f-electron bands. These suggest that CeCo 2Ga 8 is a rare example of the quasi-one-dimensional Kondo lattice, but its non-Fermi liquid behaviors resemble those of the quasi-two-dimensional YbRh 2Si 2 family. Themore » study of the quasi-one-dimensional CeCo 2Ga 8 family may therefore help us to understand the role of dimensionality on heavy fermion physics and quantum criticality.« less
Authors:
ORCiD logo [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [1] ;  [4] ;  [4] ;  [3] ;  [5] ;  [6] ;  [7] ;  [3] ;  [7] ;  [1] ;  [7]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences
  2. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Henan Normal Univ., Xinxiang (China). College of Physics and Material Science
  3. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. National Inst. for Materials Science (NIMS), Tsukuba (Japan)
  6. National Inst. for Materials Science (NIMS), Tsukuba (Japan). Research Center for Functional Materials
  7. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences; Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Report Number(s):
LA-UR-16-27918
Journal ID: ISSN 2397-4648; TRN: US1800393
Grant/Contract Number:
AC52-06NA25396; 11274367; 11522435; 11474330; 11574377; 2016YFA0300604; 2015CB921300; 2014CB921500; XDB07020000; XDB07020200; XDB07020100; 15K14133; 16H04501
Type:
Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 2; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China); National Inst. for Materials Science (NIMS), Tsukuba (Japan)
Sponsoring Org:
USDOE; National Natural Science Foundation of China (NNSFC); National Key Research and Development Program of China; State Key Development Program for Basic Research of China; Chinese Academy of Sciences; Japan Society for the Promotion of Science (JSPS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; condensed-matter physics
OSTI Identifier:
1412885

Wang, Le, Fu, Zhaoming, Sun, Jianping, Liu, Min, Yi, Wei, Yi, Changjiang, Luo, Yongkang, Dai, Yaomin, Liu, Guangtong, Matsushita, Yoshitaka, Yamaura, Kazunari, Lu, Li, Cheng, Jin-Guang, Yang, Yi-feng, Shi, Youguo, and Luo, Jianlin. Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo2Ga8. United States: N. p., Web. doi:10.1038/s41535-017-0040-9.
Wang, Le, Fu, Zhaoming, Sun, Jianping, Liu, Min, Yi, Wei, Yi, Changjiang, Luo, Yongkang, Dai, Yaomin, Liu, Guangtong, Matsushita, Yoshitaka, Yamaura, Kazunari, Lu, Li, Cheng, Jin-Guang, Yang, Yi-feng, Shi, Youguo, & Luo, Jianlin. Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo2Ga8. United States. doi:10.1038/s41535-017-0040-9.
Wang, Le, Fu, Zhaoming, Sun, Jianping, Liu, Min, Yi, Wei, Yi, Changjiang, Luo, Yongkang, Dai, Yaomin, Liu, Guangtong, Matsushita, Yoshitaka, Yamaura, Kazunari, Lu, Li, Cheng, Jin-Guang, Yang, Yi-feng, Shi, Youguo, and Luo, Jianlin. 2017. "Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo2Ga8". United States. doi:10.1038/s41535-017-0040-9. https://www.osti.gov/servlets/purl/1412885.
@article{osti_1412885,
title = {Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo2Ga8},
author = {Wang, Le and Fu, Zhaoming and Sun, Jianping and Liu, Min and Yi, Wei and Yi, Changjiang and Luo, Yongkang and Dai, Yaomin and Liu, Guangtong and Matsushita, Yoshitaka and Yamaura, Kazunari and Lu, Li and Cheng, Jin-Guang and Yang, Yi-feng and Shi, Youguo and Luo, Jianlin},
abstractNote = {Dimensionality plays an essential role in determining the anomalous non-Fermi liquid properties in heavy fermion systems. So far most heavy fermion compounds are quasi-two-dimensional or three-dimensional. Here we report the synthesis and systematic investigations of the single crystals of the quasi-one-dimensional Kondo lattice CeCo2Ga8. Resistivity measurements at ambient pressure reveal the onset of coherence at T * ≈ 20 K and non-Fermi liquid behavior with linear temperature dependence over a decade in temperature from 2 to 0.1 K. The specific heat increases logarithmically with lowering temperature between 10 and 2 K and reaches 800 mJ/mol K2 at 1 K, suggesting that CeCo2Ga8 is a heavy fermion compound in the close vicinity of a quantum critical point. Resistivity measurements under pressure further confirm the non-Fermi liquid behavior in a large temperature–pressure range. The magnetic susceptibility is found to follow the typical behavior for a one-dimensional spin chain from 300 K down to T *, and first-principles calculations predict flat Fermi surfaces for the itinerant f-electron bands. These suggest that CeCo2Ga8 is a rare example of the quasi-one-dimensional Kondo lattice, but its non-Fermi liquid behaviors resemble those of the quasi-two-dimensional YbRh2Si2 family. The study of the quasi-one-dimensional CeCo2Ga8 family may therefore help us to understand the role of dimensionality on heavy fermion physics and quantum criticality.},
doi = {10.1038/s41535-017-0040-9},
journal = {npj Quantum Materials},
number = ,
volume = 2,
place = {United States},
year = {2017},
month = {7}
}

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