Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 2, Pages 315-322Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc03463a
Keywords
-
Funding
- Laboratory Directed Research and Development program (LDRD) project
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- National Science Foundation [NSF DMR-1410428]
- Direct For Mathematical & Physical Scien [1410428] Funding Source: National Science Foundation
Ask authors/readers for more resources
Finite range ferromagnetism and antiferromagnetism in two-dimensional (2D) systems within an isotropic Heisenberg model at non-zero temperature were originally proposed to be impossible. However, recent theoretical studies using an Ising model have shown that 2D magnetic crystals can exhibit magnetism. Experimental verification of existing 2D magnetic crystals in this system has remained exploratory. In this work we exfoliated CrSiTe3, a bulk ferromagnetic semiconductor, to mono- and few-layer 2D crystals onto a Si/SiO2 substrate. Raman spectra indicate good stability and high quality of the exfoliated flakes, consistent with the computed phonon spectra of 2D CrSiTe3, giving strong evidence for the existence of 2D CrSiTe3 crystals. When the thickness of the CrSiTe3 crystals is reduced to a few layers, we observed a clear change in resistivity at 80-120 K, consistent with theoretical calculations of the Curie temperature (T-c) of similar to 80 K for the magnetic ordering of 2D CrSiTe3 crystals. The ferromagnetic mono- and few-layer 2D CrSiTe3 indicated here should enable numerous applications in nano-spintronics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available