Từ tính trong các giao diện của cấu trúc xếp lớp hetero pbtio3/laalo3/srtio3

• Ngôn ngữ: vie
• Ký hiệu phân loại: 530 Physics
• Thông tin xuất bản: Communications in physics, 2015
• Mô tả vật lý: 219-225
• Bộ sưu tập: Metadata
• ID: 486016

Tóm tắt

 The authors investigate the effect of PbTiO3 on the LaAlO3/SrTiO3 hetero-structure by density functional theory, where the asymmetry sandwich not only forms a quasi-two dimensional electron gas but also reveals a ferromagnetic state in the TiO2 interfaces. It is found out that magnetic
  moments of TiO2 interface layers are around 0.18 uB while they are mostly negligible in the pure LaAIO3/SrTiO3 system. Even though magnetic moments are mainly produced by Ti t2g orbitals, oxygen plays a key role in the formation of the ferromagnetic state since polar distortions primarily occur in oxygen positions of the SrTiO3 and PbTiO3 sides in opposite directions.