Nodeless superconductivity in a quasi-two-dimensional superconductor AuTe2Se4/3<xref rid="cpb_27_6_067401_fn1" ref-type="fn">*</xref> <fn id="cpb_27_6_067401_fn1"> <label>*</label> Project supported by the Key Basic Research Program of China (Grant Nos. 2015CB921401 and 2016YFA0300503), the National Natural Science Foundation of China (Grant Nos. 11422429 and 11421404), China Postdoctoral Science Foundation (Grant No. 2016T90332), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and STCSM of China (Grant No. 15XD1500200), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB04040200). </fn>

Nodeless superconductivity in a quasi-two-dimensional superconductor AuTe₂Se_4/3* *

Project supported by the Key Basic Research Program of China (Grant Nos. 2015CB921401 and 2016YFA0300503), the National Natural Science Foundation of China (Grant Nos. 11422429 and 11421404), China Postdoctoral Science Foundation (Grant No. 2016T90332), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and STCSM of China (Grant No. 15XD1500200), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB04040200).

Jia Xiao-Yu¹, Yu Yun-Jie¹, Chen Xu², Guo Jian-Gang², Ying Tian-Ping¹, He Lan-Po¹, Chen Xiao-Long^{2, 3, 4}, Li Shi-Yan^{1, 5, †}

(color online) (a) X-ray diffraction pattern of AuTe₂Se_4/3 single crystal. Only (00l) Bragg peaks show up, demonstrating that the largest surface is ab plane. Inset: Optical image of our AuTe₂Se_4/3 single crystals. (b) The temperature dependence of resistivity at zero field for AuTe₂Se_4/3 single crystal. Top inset: The fit of the normal-state resistivity to the Fermi-liquid behavior ρ(T) = ρ₀ + AT² from 3 K to 15 K. Bottom inset: The resistive superconducting transition at low temperature.