Electrical resistivity and tunneling anomalies in CeCuAs2

E. V. Sampathkumaran; T. Ekino; R. A. Ribeiro; Kausik Sengupta; T. Nakano; M. Hedo; N. Fujiwara; M. Abliz; Y. Uwatoko; S. Rayaprol; Th. Doert; J. P. F. Jemetio

doi:10.1016/j.physb.2005.01.005

Electrical resistivity and tunneling anomalies in CeCuAs2

Strongly Correlated Electrons 2009-11-10 v1

Authors: E. V. Sampathkumaran , T. Ekino , R. A. Ribeiro , Kausik Sengupta , T. Nakano , M. Hedo , N. Fujiwara , M. Abliz , Y. Uwatoko , S. Rayaprol , Th. Doert , J. P. F. Jemetio

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Abstract

The compound CeCuAs2 is found to exhibit negative temperature (T) coefficient of electrical resistivity (rho) under ambient pressure conditions in the entire T-range of investigation (45 mK to 300 K), even in the presence of high magnetic fields. Preliminary tunneling spectroscopic measurements indicate the existence of a psuedo-gap at least at low temperatures, thereby implying that this compound could be classified as a Kondo semi-conductor, though rho(T) interestingly is not found to be of an activated type.

Keywords

CeCuAs2 electrical resistivity tunneling spectroscopy pseudo-gap Kondo semiconductor

Cite

@article{arxiv.cond-mat/0408060,
  title  = {Electrical resistivity and tunneling anomalies in CeCuAs2},
  author = {E. V. Sampathkumaran and T. Ekino and R. A. Ribeiro and Kausik Sengupta and T. Nakano and M. Hedo and N. Fujiwara and M. Abliz and Y. Uwatoko and S. Rayaprol and Th. Doert and J. P. F. Jemetio},
  journal= {arXiv preprint arXiv:cond-mat/0408060},
  year   = {2009}
}

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To appear in the proceedings of SCES2004

Electrical resistivity and tunneling anomalies in CeCuAs2

Abstract

Keywords

Cite

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