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Dive into the research topics of 'Scanning tunneling spectroscopy on YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/PrBa<sub>2</sub>Cu<sub>3</sub>O <sub>y</sub>/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> sandwiched junctions and YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub>/Y<sub>0.5</sub>Pr <sub>0.5</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> superlattices'. Together they form a unique fingerprint.