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

Amit Kumar Mondal, Noam Brown, Suryakant Mishra, Pandeeswar Makam, Dahvyd Wing, Sharon Gilead, Yarden Wiesenfeld, Gregory Leitus, Linda J.W. Shimon, Raanan Carmieli, David Ehre, Grzegorz Kamieniarz, Jonas Fransson, Oded Hod, Leeor Kronik, Ehud Gazit, Ron Naaman

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)16624-16633
Number of pages10
JournalACS Nano
Volume14
Issue number12
DOIs
StatePublished - 22 Dec 2020

Keywords

  • CISS effect
  • chiral crystals
  • long-range spin-selective transport
  • metabolite materials
  • multiferroic materials
  • spin filter

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