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Traces of charge density waves in NbS2

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4]
  1. Univ. Grenoble Alpes, Grenoble (France); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Institut des Materiaux de Nantes, Nantes (France)
  3. The European Synchrotron, Grenoble (France)
  4. Univ. Grenoble Alpes, Grenoble (France)
Among transition metal dichalcogenides (TMD), NbS2 is often considered as the archetypal compound that does not have a charge density wave (CDW) in any of its polytypes. By comparison, close isoelectronic compounds such as NbSe2, TaS2, and TaSe2 all have CDW in at least one polytype. Here we report traces of CDW in the 2H polytype of NbS2, using diffuse x-ray scattering measurements at 77 K and room temperature. We observe 12 extremely weak satellite peaks located at ±13.9° from a* and b* around each Bragg peak in the (h,k,0) plane. These satellite peaks are commensurate with the lattice via 3q–q'=a*, where q' is the 120° rotation of q, and define two √13a × √13a superlattices in real space. These commensurate wave vectors and tilt angle are identical to those of the CDW observed in the 1T polytype of TaS2 and TaSe2. In conclusion, to understand this similarity and the faintness of the peaks, we discuss possible sources of local 1T polytype environment in bulk 2H-NbS2 crystals.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; Universities/Institutions
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1440495
Report Number(s):
LA-UR--18-20468
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 19 Vol. 97; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Optical Properties of 2D 3R Phase Niobium Disulfide and Its Applications as a Saturable Absorber journal December 2019
Niobium disulphide (NbS 2 )-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction journal January 2019
Coexistence of the Kondo effect and spin glass physics in Fe-doped NbS 2 journal January 2020
Impact ionization dynamics in small band-gap two-dimensional materials from a coherent phonon mechanism journal July 2019
Niobium disulphide (NbS$_2$)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction text January 2020

Figures / Tables (5)


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