Lifshitz metal-insulator transition induced by the all-in/all-out magnetic order in the pyrochlore oxide Cd2Os2O7
Lifshitz metal-insulator transition induced by the all-in/all-out magnetic order in the pyrochlore oxide Cd2Os2O7
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DOI：
10.1063/1.4907734
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发表时间：
2015-04-01
期刊：
影响因子：
6.1
通讯作者：
Okamoto, Y.
中科院分区：
文献类型：
--
作者：
Hiroi, Z.;Yamaura, J.;Okamoto, Y.
我们研究的金属-绝缘体转变（MIT）的锇烧绿石氧化物Cd 2 Os 2 O 7通过运输和磁化测量。在227 K时，MIT和向全进/全出（AIAO）序的磁转变同时发生。我们提出了一个机制的基础上诱导的AIAO磁序可能通过强自旋轨道耦合在特定的半金属带结构的Lifshitz过渡。有人建议，此外，两个观察到的难题，一个有限的电导率T = 0附近和出现弱铁磁矩，是不是散装的属性，但起源于两种AIAO域之间的磁畴壁。(C)2015年作者。所有文章内容，除非另有说明，是根据知识共享署名3.0未移植许可证许可。
We investigate the metal-insulator transition (MIT) of the osmium pyrochlore oxide Cd2Os2O7 through transport and magnetization measurements. The MIT and a magnetic transition to the all-in/all-out (AIAO) order occur simultaneously at 227 K. We propose a mechanism based on a Lifshitz transition induced by the AIAO magnetic order probably via strong spin-orbit couplings in the specific semimetallic band structure. It is suggested, moreover, that two observed puzzles, a finite conductivity near T = 0 and an emergence of weak ferromagnetic moments, are not bulk properties but originate at magnetic domain walls between two kinds of AIAO domains. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.