Novel Spin-Orbital Phases Induced by Orbital Dilution

被引：21
|
作者：
Brzezicki, Wojciech [1 ,2 ]
Cuoco, Mario [1 ,2 ]
Oles, Andrzej M. [3 ,4 ]
机构：
[1] CNR SPIN, IT-84084 Fisciano, SA, Italy
[2] Univ Salerno, Dipartimento Fis ER Caianiello, IT-84084 Fisciano, SA, Italy
[3] Jagiellonian Univ, Marian Smoluchowski Inst Phys, Prof S Lojasiewicza 11, PL-30348 Krakow, Poland
[4] Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2016年 / 29卷 / 03期
关键词：
Orbital dilution; Spin-orbital order; Orbital polarons; Doped Mott insulator;
D O I：
10.1007/s10948-015-3287-z
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate that magnetic 3d impurities with S = 3/2 spins and no orbital degree of freedom induce changes of spin-orbital order in a 4d (4) Mott insulator with S = 1 spins. Impurities act either as spin defects which decouple from the surrounding ions, or trigger orbital polarons along 3d- 4d bonds. The 4d- 4d superexchange in the host J (host) competes with 3d- 4d superexchange J (imp)-it depends on which orbital is doubly occupied. The spin-orbital order within the host is totally modified at doping x = 1/4. Our findings provide new perspective for future theoretical and experimental studies of doped transition-metal oxides.
引用
收藏
页码：563 / 567
页数：5
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