  A material described as lutetium-hydrogen-nitrogen (Lu-H-N in short) was
recently claimed to have near-ambient superconductivity[Gammon et al, Nature
615, 244, 2023]. If the results could be reproduced by other teams, it would be
a major scientific breakthrough. Here, we report our results of transport and
structure measurements on a material prepared using the same method as that
reported by Gammon et al. Our X-ray diffraction measurements indicated that the
obtained sample contained three substances: the FCC-1 phase (Fm-3m) with a
lattice parameter a=5.03 {\AA}, the FCC-2 phase (Fm-3m) with a lattice
parameter a= 4.755 {\AA} and Lu metal. These two FCC phases are identical to
the those reported in the so-called near-ambient superconductor. However, we
found that the samples had no evidence of superconductivity, through our
resistance measurements in the temperature range of 300 - 4 K and pressure
range of 0.9 - 3.4 GPa, and our magnetic susceptibility measurements in the
pressure range of 0.8-3.3 GPa and temperature down to 100 K. We also used a
laser heating technique to heat the sample to 1800{\deg}C and found no
superconductivity in the produced dark blue samples below 6.5 GPa. In addition,
the color of the both samples remain dark blue in the pressure range
investigated.
