Tunneling spectra of underdoped Bi_2Sr_2Ca_(1-x)Y_xCu_2O_(8+δ) intrinsic Josephson junctions

<正>Mesa-structured submicron intrinsic Josephson junctions are successfully fabricated and well characterized on underdoped Bi_2Sr_2Ca_(1-x)Y_xCu-2O_(8+δ) single crystals with a T_c of 80 K.Tunneling spectra at the temperatures ranging from 4.2 K to 295 K are measured.A pulse technique is used to reduce sample heating for the measurement near pseudogap opening temperature T~*~280 K.Our experimental results show that the superconducting gap,the peak-dip separation,and the pseudogap opening temperature are all increased as compared with those from near optimally doped samples,which requires further theoretical analysis in the future.     

智能温控烤箱触控MCU设计

触控微控制单元（MCU）具有灵敏度高、稳定性好和功耗低等优点，因而在智能家居领域得到了广泛的应用。对智能温控烤箱触控MCU设计方案进行了研究。首先，对比了触控MCU和触控IC方案之间的差异；其次，阐述了MCU的原理；然后，展示了MCU软、硬件设计方案；最后，介绍了触控按键软件调试方案，并通过测试实例，总结了参数调试的难点，对于提高触控MUC产品灵敏度的和用户体验具有一定的借鉴意义。