Carrier induced magnetic coupling transitions in phthalocyanine-based organometallic sheet

被引：46
|
作者：
Zhou, Jian [1 ]
Sun, Qiang [1 ,2 ]
机构：
[1] Peking Univ, Dept Mat Sci & Engn, Beijing 100871, Peoples R China
[2] Peking Univ, Ctr Appl Phys & Technol, Beijing 100871, Peoples R China
来源：
NANOSCALE | 2014年 / 6卷 / 01期
基金：
中国国家自然科学基金;
关键词：
METAL PHTHALOCYANINES; ELECTRONIC-STRUCTURE; FE; CO; CU;
D O I：
10.1039/c3nr04041k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A two-dimensional sheet with long range ferromagnetic (FM) order has been hotly pursued currently. The recent success in synthesizing polymerized Fe-phthalocyanine (poly-FePc) porous sheets paves a possible way to achieve this goal. However, the poly-FePc and its analog poly-CrPc structure are intrinsically antiferromagnetic (AFM). Using first principles combined with Monte-Carlo simulations, we study systematically the carrier-induced magnetic coupling transitions in poly-CrPc and poly-FePc sheets. We show that electron doping can induce stable FM states with Curie temperatures of 130-140 K, while hole doping will enhance the stability of the AFM states. Such changes in magnetic couplings depend on the balance of AFM superexchange and FM p-d exchange.
引用
收藏
页码：328 / 333
页数：6
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