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Point-contact spectroscopy of heavy fermion superconductors Ce2PdIn8 and Ce3PdIn11 in comparison with CeCoIn5

Journal Article · · Journal of Physics. Condensed Matter
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [4];  [3];  [5]
  1. Zhejiang Univ., Hangzhou (China)
  2. Sungkyunkwan University (Korea, Republic of)
  3. Polish Academy of Sciences (PAS), Wroclaw (Poland)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Zhejiang Univ., Hangzhou (China); Nanjing Univ. (China)
+ Show Author Affiliations

Here, we report point-contact spectroscopy measurements on heavy fermion cousins CeCoIn5, Ce2PdIn8 and Ce3PdIn11 to systematically study the hybridization between f and conduction electrons. Below a temperature T*, the spectrum of each compound exhibits an evolving Fano-like conductance shape, superimposed on a sloping background, that suggests the development of hybridization between local f and itinerant conduction electrons in the coherent heavy fermion state below T*. We present a quantitative analysis of the conductance curves with a two-channel model to compare the tunneling process between normal metallic silver particles in our soft point-contact and heavy-fermion single crystals CeCoIn5, Ce2PdIn8 and Ce3PdIn11.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Zhejiang Provincial Natural Science Foundation of China; Polish National Science Centre (NCN)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1883142
Alternate ID(s):
OSTI ID: 23181132
Report Number(s):
LA-UR-20-30401
Journal Information:
Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 20 Vol. 33; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
Fano-line
heavy fermion
hybridization
point-contact spectroscopy