Long-Range Spin-Selective Transport in Chiral Metal-Organic Crystals with Temperature-Activated Magnetization.

Long-Range Spin-Selective Transport in Chiral Metal-Organic Crystals with Temperature-Activated Magnetization.
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在手性金属有机晶体中具有温度激活磁化的远程自旋选择性转运。

DOI:
10.1021/acsnano.0c07569
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发表时间:
2020-12-22
期刊:
影响因子:
17.1
通讯作者:
Naaman R
Naaman R
中科院分区:
材料科学1区
文献类型:
--
作者:
Mondal AK;Brown N;Mishra S;Makam P;Wing D;Gilead S;Wiesenfeld Y;Leitus G;Shimon LJW;Carmieli R;Ehre D;Kamieniarz G;Fransson J;Hod O;Kronik L;Gazit E;Naaman R

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使用磁导电性原子力显微镜,在手性金属 - 有机铜(II)苯丙氨酸晶体中发现了室温,远距离(300 nm),手学诱导的自旋选择性电子传导。值得注意的是,观察到的铁磁和铁电是值得注意的,观察到的铁磁被热激活,因此晶体在低温下是抗铁磁磁性从铜(II)离子通过手性晶格的间接交换相互作用。
Room-temperature, long-range (300 nm), chirality-induced spin-selective electron conduction is found in chiral metal–organic Cu(II) phenylalanine crystals, using magnetic conductive-probe atomic force microscopy. These crystals are found to be also weakly ferromagnetic and ferroelectric. Notably, the observed ferromagnetism is thermally activated, so that the crystals are antiferromagnetic at low temperatures and become ferromagnetic above ∼50 K. Electron paramagnetic resonance measurements and density functional theory calculations suggest that these unusual magnetic properties result from indirect exchange interaction of the Cu(II) ions through the chiral lattice.
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