한국초전도학회:학술대회논문집

The Korean Superconductivity Society (한국초전도학회)
권호 표지

Effect of an additional resistance on Shapiro steps of the Josephson junction

조셉슨 접합의 샤피로 계단특성에 대한 부가저항의 효과

  • 심우석 (서강대학교 물리학과) ;
  • 조원일 (서강대학교 물리학과) ;
  • 송이헌 (서강대학교 물리학과) ;
  • 김도현 (서강대학교 물리학과) ;
  • 박광서 (서강대학교 물리학과) ;
  • 송인상 (삼성종합기술원 마이크로시스템연구실)
  • Published : 1999.08.18
Download PDF
⟨ Previous Next ⟩

Abstract

We have investigated the microwave properties of a high-T$_c$. superconducting Josephson junction by Shapiro step measurements. A Josephson junction was fabricated on the bicrystal MgO substrate using pulsed laser deposition method. We have measured Shapiro steps in the I-V characteristics under the irradiation of 1.36 cm wavelength up to 45 K and found inclined current steps above 50 K. In order to understand these results, we introduced an additional resistance connected in series to RSJ model. Using this modified RSJ model, we could explain the inclined current steps as a result of superposition of the junction and an additional resistance above certain temperatures. Also, we presented the received power of the Josephson junction above 50 K.

Keywords