Stabilization of antiferromagnetism in 1T-Fe0.05TaS2

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

4 Scopus Citations
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  • Q. Niu
  • W. Zhang
  • Y. T. Chan
  • E. C. T. O'Farrell
  • R. Doganov
  • K. Y. Yip
  • Kwing To Lai
  • B Özyilmaz
  • G. R. Stewart
  • J. S. Kim
  • Swee K. Goh

Related Research Unit(s)


Original languageEnglish
Article number023297
Journal / PublicationPhysical Review Research
Issue number2
Online published5 Jun 2020
Publication statusPublished - Jun 2020



1T-TaS2 is a prototypical charge-density-wave system with a Mott insulating ground state. Usually, a Mottinsulator is accompanied by an antiferromagnetic state. However, the antiferromagnetic order had never beenobserved in 1T-TaS2. Here, we report the stabilization of the antiferromagnetic order by the intercalation ofa small amount of Fe into the van der Waals gap of 1T-TaS2, i.e., forming 1T-Fe0.05TaS2. Upon cooling from300 K, the electrical resistivity increases with a decreasing temperature before reaching a maximum value ataround 15 K, which is close to the Néel temperature determined from our magnetic susceptibility measurement.The antiferromagnetic state can be fully suppressed when the sample thickness is reduced, indicating that theantiferromagnetic order in Fe0.05TaS2 has a non-negligible three-dimensional character. For the bulk Fe0.05TaS2, acomparison of our high pressure electrical transport data with that of 1T-TaS2 indicates that, at ambient pressure,Fe0.05TaS2 is in the nearly commensurate charge-density-wave phase near the border of the Mott insulating state.The temperature-pressure phase diagram thus reveals an interesting decoupling of the antiferromagnetism fromthe Mott insulating state.

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Stabilization of antiferromagnetism in 1T-Fe0.05TaS2. / Niu, Q.; Zhang, W.; Chan, Y. T. et al.
In: Physical Review Research, Vol. 2, No. 2, 023297, 06.2020.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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