La_0.33Ca_0.67Mno₃钙钛矿中的电荷有序

La 0.33 Ca 0.67 Mno 3 钙钛矿中的电荷有序 tranCharge-Ordering in La 0.33 Ca 0.67 MnO 3 Perovskite 王仁卉 1 2 3 4 first-author 桂嘉年 1 2 3 4 朱溢眉 1 2 3 4 武汉大学物理学系,武汉,430072 武汉大学物理学系,武汉,430072 Department of Physics, Wuhan University Department of Physics, Wuhan University Brookhaven National Laboratory!Upton Brookhaven National Laboratory!Upton Brookhaven National Laboratory, Upton Brookhaven National Laboratory, Upton ,NY,11973 ,NY,11973 Ｌａ ０．３３ Ｃａ ０．６７ ＭｎＯ ３ 钙钛矿中电荷有序的结构模型是当前凝聚态物理学研究热点之一，前人的工作在这方面有很大的分歧．本文用透射电子显微术证实了横向位移的Ｗｉｇｎｅｒ晶体模型，否定了纵向位移的双条带（ｂｉ－ｓｔｒｉｐｅ）模型．在电荷有序的Ｌａ ０．３３ Ｃａ ０．６７ ＭｎＯ ３ 中发现了非公度调制和在电荷有序过程中生成的位移矢量为ａｃｏ／３的反相畴． Structure model of charge-ordered La 0.33 Ca 0.67 MnO 3 perovskite is one of current focusedstudy in condensed matter physics. There are great discrepancies in previous studies in this field. Ourtransmission electron microscopy study confirms Wigner crystal model with transverse displacement and isnot consisent with the bi-stripe model with longitudinal displacement. We observed incommensurate modulation and anti-phase domains with a displacement vector aco/3 in charge-ordered La 0.33 Ca 0.67 MnO 3 perovskite. 电荷有序 钙钛矿结构 La0.33Ca0.67MnO3 电子显微学 畴结构 过渡金属氧化物 特大磁阻性 10.14188/j.1671-8836.2000.01.021 O469 国家自然科学基金!（19974031） 2000-01-01 2021-04-01 1