Single crystals of CeSbTe with a ZrSiS-type structure were synthesized using vapor transport method. The stoichiometry is deviated from the nominal composition, which may cause some disorder in this compound. The physical properties were characterized by measuring the magnetic susceptibility, electrical resistivity, Hall resistivity and specific heat. One antiferromagnetic (AFM) transition related to Ce 3+ ions was found at T N = 2.62 K, and a field-induced metamagnetic transition was observed below T N . The moderately enhanced Sommerfeld coefficient γ = 41 mJ mol −1 • K −2 and the estimated Kondo temperature T K ∼ 1.3 K, indicate that CeSbTe is a moderately correlated AFM Kondo lattice compound with crystalline electric field effect. The carrier concentration of CeSbTe derived from the Hall coefficient is in the order of 10 21 cm −3 , lower than most Kondo metals, which indicates that CeSbTe is a low-carrier-density Kondo semimetal.

The large size single crystals of (SnSe)(NbSe) misfit layered compound were grown and superconductivity with T of 3.4 K was first discovered in this system. Powder x-ray diffraction and high resolution transmission electron microscopy clearly display the misfit feature between SnSe and NbSe subsystems. The Sommerfeld coefficient γ inferred from specific-heat measurements is 16.73 mJ mol K, slightly larger than the usual misfit compounds. The normalized specific heat jump [Formula: see text] is about 0.98, and the electron-phonon coupling constant [Formula: see text] is estimated to be 0.80. The estimated value of the in-plane upper critical magnetic field, [Formula: see text](0), is about 7.82 T, exceeding the Pauli paramagnetic limit slightly. Both the specific-heat and H data suggest that (SnSe)(NbSe) is a multi-band superconductor.

We report the discovery of superconductivity with a maximum T c ≈1.28 K in Br-doped (PbSe) 1.12 (TaSe 2 ), which is a new misfit compound consisting of alternating layers of distorted rocksalt PbSe and dichalcogenide TaSe 2 . It is found that the Br-doping is required for the formation of this misfit compound and superconductivity can be tuned by the Br content. The large anisotropic parameter of resistivity c ab g r r = r ≈100 and that of the upper critical field H c2 g = H H c ab c c 2 2 ≈10 are obtained. The estimated c-axis coherence length cx ≈6.3 nm, larger than the c-axis lattice constant, which implies that this compound is an anisotropic threedimensional superconductor. The Hall coefficient measurements suggest that the charge transport is dominated by the hole-type charge carrier and there is a charge transfer from the PbSe layer to the conducting TaSe 2 layer. The small normalized specific heat jump ΔC/γ T c =1.16 and electron-phonon coupling constant λ ep ≈0.61 indicate that Br-doped (PbSe) 1.12 (TaSe 2 ) is a weak coupling Bardeen-Cooper-Schrieffer superconductor.

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