1D Magnetic MX3 Single-Chains (M = Cr, V and X = Cl, Br, I)

Yangjin Lee; Young Woo Choi; Kihyun Lee; Chengyu Song; Peter Ercius; Marvin L Cohen; Kwanpyo Kim; Alex Zettl

doi:10.1002/adma.202307942

1D Magnetic MX₃ Single-Chains (M = Cr, V and X = Cl, Br, I)

Adv Mater. 2023 Dec;35(49):e2307942. doi: 10.1002/adma.202307942. Epub 2023 Oct 28.

Authors

Yangjin Lee^{1

2

3

4}, Young Woo Choi^{1

2}, Kihyun Lee^{3

4}, Chengyu Song⁵, Peter Ercius⁵, Marvin L Cohen^{1

2}, Kwanpyo Kim^{3

4}, Alex Zettl^{1

2

6}

Affiliations

¹ Department of Physics, University of California at Berkeley, Berkeley, CA, 94720, USA.
² Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
³ Department of Physics, Yonsei University, Seoul, 03722, South Korea.
⁴ Center for Nanomedicine, Institute for Basic Science, Seoul, 03722, South Korea.
⁵ National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
⁶ Kavli Energy NanoSciences Institute, University of California at Berkeley, Berkeley, CA, 94720, USA.

PMID: 37771062
DOI: 10.1002/adma.202307942

Abstract

Magnetic materials in reduced dimensions are not only excellent platforms for fundamental studies of magnetism, but they play crucial roles in technological advances. The discovery of intrinsic magnetism in monolayer 2D van der Waals systems has sparked enormous interest, but the single-chain limit of 1D magnetic van der Waals materials has been largely unexplored. This paper reports on a family of 1D magnetic van der Waals materials with composition MX₃ (M = Cr, V, and X = Cl, Br, I), prepared in fully-isolated fashion within the protective cores of carbon nanotubes. Atomic-resolution scanning transmission electron microscopy identifies unique structures that differ from the well-known 2D honeycomb lattice MX₃ structure. Density functional theory calculations reveal charge-driven reversible magnetic phase transitions.

Keywords: 1D materials; atomic chain; density functional theory; magnetic chain; nanotubes; transition metal halide; transmission electron microscopy.

Abstract

Grants and funding