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

页码：328 / 333

页数：6