With the development of the technique of preparing thin film, artificial superlattices of high-T<sub>c</sub>oxides, especially （YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub&...With the development of the technique of preparing thin film, artificial superlattices of high-T<sub>c</sub>oxides, especially （YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>）<sub>n</sub>/（PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>）<sub>m</sub>, have attracted much attention due to the possibilities of studying a variety of superconducting physical properties otherwise inaccessible. One of the many interesting characteristics of this system is the reduction of T<sub>c</sub> with increase of the thickness of the PrBCO layer in superlattices with thin YBCO layer, which has been observed by many groups. Several theoretical models have been proposed to account for this interesting phenomenon, including a spin polaron model,展开更多
文摘With the development of the technique of preparing thin film, artificial superlattices of high-T<sub>c</sub>oxides, especially （YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>）<sub>n</sub>/（PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>）<sub>m</sub>, have attracted much attention due to the possibilities of studying a variety of superconducting physical properties otherwise inaccessible. One of the many interesting characteristics of this system is the reduction of T<sub>c</sub> with increase of the thickness of the PrBCO layer in superlattices with thin YBCO layer, which has been observed by many groups. Several theoretical models have been proposed to account for this interesting phenomenon, including a spin polaron model,
