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

ABSTRACT: 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.

SUBMITTER: Mondal AK

PROVIDER: S-EPMC7760088 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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

Mondal Amit Kumar AK Brown Noam N Mishra Suryakant S Makam Pandeeswar P Wing Dahvyd D Gilead Sharon S Wiesenfeld Yarden Y Leitus Gregory G Shimon Linda J W LJW Carmieli Raanan R Ehre David D Kamieniarz Grzegorz G Fransson Jonas J Hod Oded O Kronik Leeor L Gazit Ehud E Naaman Ron R

ACS nano 20201023 12

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 ...[more]

PMID: 33095016

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