한국초전도학회:학술대회논문집

The Korean Superconductivity Society (한국초전도학회)
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Mixed-state Hall effect in Hg-and Tl-based superconducting thin films

수은 및 탈륨계 초전도박막에서 혼합상태의 홀효과

  • Kang, Won-Nam (National Creative Research Initiative Center for Superconductivity, Department of Physics, Pohang University of Science and Technology) ;
  • Kim, Wan-Seon (National Creative Research Initiative Center for Superconductivity, Department of Physics, Pohang University of Science and Technology) ;
  • Oh, Sang-Jun (National Creative Research Initiative Center for Superconductivity, Department of Physics, Pohang University of Science and Technology) ;
  • Lee, Seong-Ik (National Creative Research Initiative Center for Superconductivity, Department of Physics, Pohang University of Science and Technology) ;
  • Kim, Dong-Ho (Department of Physics, Yeungnam University) ;
  • Choi, Chang-Ho (Material Science Team, Korea Basic Science Institute) ;
  • Ri, Hyeong-Cheol (Material Science Team, Korea Basic Science Institute)
  • 강원남 (포항공과대학교 물리학과 초전도연구단) ;
  • 김완선 (포항공과대학교 물리학과 초전도연구단) ;
  • 오상준 (포항공과대학교 물리학과 초전도연구단) ;
  • 이성익 (포항공과대학교 물리학과 초전도연구단) ;
  • 김동호 (영남대학교 물리학과) ;
  • 최창호 (기초과학지원연구소 재료연구팀) ;
  • 이형철 (기초과학지원연구소 재료연구팀)
  • Published : 1999.08.18
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Abstract

We have investigated the mixed-state Hall effect in HgBa$_2CaCu_2O_6$, HgBa$_2Ca_2Cu_3O_8$, and Tl$_2Ba_2Cau_2O_8$ thin films as functions of the magnetic field up to 18 T. At high fields and low temperatures, the scaling exponent in ${\rho}_{xy}$ = A${\rho}_{xx}\;^{\beta}$ shows a universal behavior, ${\beta}$ = 1 ${\pm}$ 0.1, regardless of the field, the number of CuO$_2$ layers, the types of defects, and even the types of compounds. At low fields and high temperatures, p = 1 ${\pm}$ 0.1 also appears as a universal number although the observed field range is rather limited. These observations show the universal scaling of Hall resistivity in the regions of the clean and the moderately clean limit, consistent with a theory based on the midgap states in the vortex core.

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