Investigation on the Current Transport Characteristics of SrTiO3/YBa2Cu3O7−x Heterostructure

  • JiQiang Jia
  • JianMin Li
  • GaoYang Zhao
Original Paper


By the combined use of the sol-gel and pulsed laser deposition methods, the SrTiO3/YBa2Cu3O7−x (STO/YBCO) heterostructure was prepared on a LaAlO3 substrate. XRD results and φ scanning test showed that the prepared STO/YBCO heterostructure had good biaxial texture. Moreover, a Pt electrode was sputtered on the STO/YBCO heterostructure to investigate the current density-voltage (JV) characteristic curves of STO/YBCO in the 50–300 K temperature range. The results showed that the STO/YBCO heterostructure had good rectifying characteristics. With an applied positive bias voltage smaller than 3.7 V, the current density of the STO/YBCO heterostructure decreased with the decrease of temperature; for higher voltages, on the contrary, the current density increased with the decrease of temperature. When the YBCO experienced superconducting transition, the turn-on voltage (V t) changed suddenly due to the sudden opening of the superconducting energy gap of YBCO. The V t variation obtained from the experiment was essentially consistent with the known value of the YBCO superconducting energy gap.


SrTiO3/YBa2Cu3O7−x Heterostructure JV curves Schottky barrier 



This work was supported by the National Natural Science Foundation of China (No. 51372198 and No. 51672212).


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Authors and Affiliations

  1. 1.Advanced Materials Analysis and Test CenterXi’an University of TechnologyXi’anChina
  2. 2.School of Materials Science and EngineeringXi’an University of TechnologyXi’anChina

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