Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain

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	Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain
	S. Dong; Q. F. Zhang; S. Yunoki; J. M. Liu; E. Dagotto
	2012
发表期刊	Physical Review B
ISSN	1098-0121
卷号	86 期号:20
摘要	The two-orbital double-exchange model is employed for the study of the magnetic and orbital orders in (RMnO3)(n)/(AMnO(3))(2n) (R: rare earths; A: alkaline-earth metal) superlattices. The A-type antiferromagnetic order is observed in a broad region of parameter space for the case of SrTiO3 as substrate, in agreement with recent experiments and first-principles calculations using these superlattices. In addition, a C-type antiferromagnetic state is also predicted to be stabilized when using substrates like LaAlO3 with smaller lattice constants than SrTiO3, again in agreement with first-principles results. The physical mechanism for the stabilization of the A and C magnetic transitions is driven by the orbital splitting of the x(2) - y(2) and 3z(2) - r(2) orbitals. This splitting is induced by the Q(3) mode of Jahn-Teller distortions created by the strain induced by the substrates. In addition to the special example of (LaMnO3)(n)/(SrMnO3)(2n), our phase diagrams can be valuable for the case where the superlattices are prepared employing narrow bandwidth manganites. In particular, several nonhomogenous magnetic profiles are predicted to occur in narrow-bandwidth superlattices, highlighting the importance of carrying out investigations in this mostly unexplored area of research.
部门归属	[dong, shuai] southeast univ, dept phys, nanjing 211189, jiangsu, peoples r china. [dong, shuai; dagotto, elbio] univ tennessee, dept phys & astron, knoxville, tn 37996 usa. [dong, shuai; dagotto, elbio] oak ridge natl lab, div mat sci & technol, oak ridge, tn 37831 usa. [dong, shuai; liu, j-m] nanjing univ, natl lab solid state microstruct, nanjing 210093, jiangsu, peoples r china. [zhang, qinfang] yancheng inst technol, key lab adv technol environm protect jiangsu prov, yancheng 224051, peoples r china. [zhang, qinfang; yunoki, seiji] riken asi, computat condensed matter phys lab, wako, saitama 3510198, japan. [zhang, qinfang; yunoki, seiji] japan sci & technol agcy jst, crest, kawaguchi, saitama 3320012, japan. [yunoki, seiji] riken aics, computat mat sci res team, kobe, hyogo 6500047, japan. [liu, j-m] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;dong, s (reprint author), southeast univ, dept phys, nanjing 211189, jiangsu, peoples r china.
关键词	Oxide Interfaces Phase-separation Electronics Manganites Bias
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59929
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Dong,Q. F. Zhang,S. Yunoki,et al. Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain[J]. Physical Review B,2012,86(20).
APA	S. Dong,Q. F. Zhang,S. Yunoki,J. M. Liu,&E. Dagotto.(2012).Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain.Physical Review B,86(20).
MLA	S. Dong,et al."Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain".Physical Review B 86.20(2012).