Strain-induced spin crossover in phthalocyanine-based organometallic sheets

Jian Zhou, Qian Wang, Qiang Sun, Yoshiyuki Kawazoe, Puru Jena

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Motivated by the recent success in synthesizing two-dimensional Fe-phthalocyanine (poly-FePc) porous sheets, we studied strain-induced spin crossover in poly-TMPc (TM = Mn, Fe, Co, and Ni) systems by using first-principle calculations based on density functional theory. A small amount of biaxial tensile strain is found to not only significantly enhance the magnetic moment of the central TM atoms by 2 μ B when the strain reaches a critical value, but also the systems undergo low-spin (LS) to high-spin (HS) transition. These systems, however, show different response to strain, namely, poly-FePc sheet becomes ferromagnetic (FM) while poly-MnPc and poly-NiPc sheets become antiferromagnetic (AFM). Poly-CoPc, on the other hand, remains AFM. These predicted results can be observed in suspended poly-TMPc sheets by using scanning tunneling microscope (STM) tips to manipulate strain.

Original languageEnglish
Pages (from-to)3109-3114
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume3
Issue number21
DOIs
Publication statusPublished - 2012 Nov 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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