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Single Mn Atom Doping in Chiral Sensitive Assembled Gold Clusters to Molecular Magnet
ACS Nano ( IF 17.1 ) Pub Date : 2021-03-05 , DOI: 10.1021/acsnano.0c10260
Deepak K. Swain 1 , Gyanadeep Mallik 1 , Pooja Srivastava 2 , Anoop K. Kushwaha 1 , Parasmani Rajput 3 , Shambhu N. Jha 3 , Seokmin Lim 4, 5 , Seungchul Kim 4 , Satchidananda Rath 1
Affiliation  

Chiral stirred optical and magnetic properties, through the doping of assembled ultrasmall metal clusters (AMCs), are promising discernment to rivet the molecule-like quantum devices. Here, the single manganese (Mn) atom doping and assembly of the gold cluster (Au8), leading to the chirality driven magnetism, has been achieved through a ligand-mediated growth. The X-ray absorption near edge structure and electron paramagnetic resonance studies corroborate the tetrahedral coordinated local structure of Mn dopant in the Au host. The optical and vibrational circular dichroic analysis affirms the modulation of chirality (negative to positive) in the presence of the Mn. A distinct ferromagnetic hysteresis loop at 300 K shows Mn ridden chiral sensitive ferromagnetism in contrary to the ligand influenced superparamagnetic undoped AMCs. The spin-polarized density functional theory level of calculations reveal the partial overlapping of spin-up and -down density of states in the doped AMCs, attributing to the ferromagnetic nature as like a molecular magnet suitable for the opto-spintronics application.

中文翻译:

手性敏感组装金簇中单锰原子向分子磁体的掺杂

通过对组装的超小型金属簇(AMC)进行掺杂,手性搅拌的光学和磁学性质有望使铆钉像分子的量子器件变得有眼光。在此,金团簇的单锰(Mn)原子掺杂和组装(Au 8通过配体介导的生长已经实现了导致手性驱动的磁性)。X射线吸收的近边缘结构和电子顺磁共振研究证实了Au主体中Mn掺杂剂的四面体配位局部结构。光学和振动圆二向色性分析证实了在存在Mn时手性的调节(从负到正)。与配体影响的超顺磁性无掺杂AMC相反,在300 K处有明显的铁磁磁滞回线显示Mn缠着手性敏感铁磁。自旋极化密度泛函理论水平的计算揭示了掺杂AMC中状态的自旋向上和向下密度的部分重叠,这归因于铁磁性质,就像适合于光电自旋电子应用的分子磁体一样。
更新日期:2021-04-28
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