Abstract
We report the induced superconductivity by Fe-doping in charge-density-wave (CDW) system 1T-TaS2 and discuss the interplay between CDW and superconductivity. The grown 1T-phase FexTa1−xS2 (0 ≤ x ≤ 0.05) single crystals are experimentally measured and the electronic structures are calculated by density functional theory (DFT). Our results shows that the CDW is suppressed gradually accompanied by the disappearance of pseudogap/Mott-gap. The induced new superconducting state appears at low temperatures for samples with moderate doping levels (x = 0.02 and 0.03). The induced superconductivity and CDW phases may be separated in real space. For high Fe-doping concentration (x ≥ 0.04), the Anderson localization (AL) state is observed due to the occupation disorder, which results in an insulating behavior.
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