Local electron structure and vacancy properties for oxygen deficient YBa2Cu3O7−δ(δ = 0.06∼0.68) by positron lifetime data

Characteristic of local electron structu

Characteristic of local electron structure, O–T phase transition and superconductivity for oxygen-deficient YBa2Cu3O7−δ systems

✍ Jincang Zhang; Yujian Cui; Dongmei Deng; Zhenping Chen; Xigui Li; Guosheng Cheng 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 118 KB

The oxygen deficient YBa Cu O d s 0.06 ; 0.68 has been studied by positron lifetime experiment at normal state 2 3 7 yd 300 K. It is found that there exists an abrupt change of positron lifetime parameter near Orthorhombic-Tetragonal phase transition. The local electron density n and vacancy concent