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Transport Study on Overdoped TlBa2CUO6+δ Single Crystal

Published online by Cambridge University Press:  26 February 2011

Takashi Manako ,
Yuichi Shimakawa  and
Yoshimi Kubo
Takashi Manako
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
Yuichi Shimakawa
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
Yoshimi Kubo
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
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Abstract

Tl2Ba2Cuo6+δ(T1-2201) single crystals are prepared by a KCI flux method. In-plane and out-of plane resistivities (ρabρc as well as the in-plane Hall coefficient are measured for the single crystal samples with various 7c's. The ρc values are as large as ∼10−1 Ω cm, which is larger than that of YBa2Cu3O7, but smaller than that of Bi2Sr2CaCu2O8. Temperature dependences of ρc show metallic behaviors for both normal metallic and 75-K superconducting samples. Temperature dependence of in-plane resistivity par changes from ∼T2 to ∼T1 with increasing Tc In-plane Hall coefficient RH shows a characteristic maximum at about 100 K for all samples. Although both ρab and RH have rather a complicated temperature dependence, inverse Hall mobility μH(=ρab/RH always exhibits clear T2 dependence for all samples. These results suggest that the intrinsic scattering rate of this material varies as ∼T2, just like in an ordinary Fermi liquid, and that the carrier concentration actually changes with temperature like that observed in nH(=1/RHe).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 455
Copyright
Copyright © Materials Research Society 1992

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References

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