Point-contact spectroscopy on antiferromagnetic Kondo semiconductors CeT2Al10 (T = Ru and Os)

Point-contact spectroscopy on antiferromagnetic Kondo semiconductors CeT₂Al₁₀ (T = Ru and Os)

Li Jie¹, Che Li-Qiang¹, Le Tian¹, Zhang Jia-Hao², Sun Pei-Jie², Takabatake Toshiro^{1, 3}, Lu Xin^{1, 4, 5, †}

(a) Co-tunneling fitting curves (solid lines) in comparison with the temperature dependent conductance curves G(V) (circles). The curves are shifted for clarity. (b) The extracted hybridization gap Δ_h as a function of temperature from the co-tunneling model fitting (solid squares). A linear extrapolation of the gap closes at 32.5 K (red dashed line) and the black dashed line starts around T_N. (c) The point-contact conductance curves G(V) as a function of magnetic field B up to 10 T at T = 1.8 K.