Incorporating another metal into binary metal borides has emerged as a highly effective strategy for optimizing material properties.Herein,using high-throughput calculations,we systematically investigated the structur...Incorporating another metal into binary metal borides has emerged as a highly effective strategy for optimizing material properties.Herein,using high-throughput calculations,we systematically investigated the structural,electronic,and superconducting properties of Fm3m and F43m phases of Li_(2)MB(M=alkaline earth,3d,and 4d metals).Our analysis of 48 Li_(2)MB compounds at 0-60 GPa reveals that four of them are promising superconductors with TC≥10 K.It is further demonstrated that substitution of different M elements serves as an effective strategy for electron doping,enabling precise control of the band structure and density of states near the Fermi level for the F43m phase.This behavior is exemplified in Li_(2)Sc_(1-x)Ti_(x)B(x=0.05-0.25),which transforms from a semiconductor into a metal and further into a superconductor with increasing Ti doping concentration.For the Fm3m phase,Dirac points near the Fermi level are observed in the M=Sc and Y systems,suggesting unique electronic behavior.Our work provides deep insight into the superconducting mechanisms of lithium-based borides and offers guidance for the targeted design of novel boride superconductors.展开更多
本文针对矿井传统贯通测量技术在复杂地质条件和长距离作业中面临的累积误差大、数据可靠性低等难题,系统研究了高精度贯通测量技术体系的构建与应用。通过融合卡尔曼滤波动态数据处理算法、三维激光扫描等先进感知设备和北斗-超宽带(Ul...本文针对矿井传统贯通测量技术在复杂地质条件和长距离作业中面临的累积误差大、数据可靠性低等难题,系统研究了高精度贯通测量技术体系的构建与应用。通过融合卡尔曼滤波动态数据处理算法、三维激光扫描等先进感知设备和北斗-超宽带(Ultra Wide Band,UWB)天地协同定位技术,构建“天—地—井”一体化智能测量体系;基于“建筑信息模型(Building Information Modeling,BIM)+地理信息系统(Geographic Information System,GIS)”智能决策平台,进行三维建模与数字孪生预演,并在千米深井与超长距离贯通工程中开展应用验证。结果表明,该技术可以有效缩小测量误差、提升工程效率并降低安全风险,为智慧矿山建设提供了可靠的技术支撑。展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11574109 and 91745203)。
文摘Incorporating another metal into binary metal borides has emerged as a highly effective strategy for optimizing material properties.Herein,using high-throughput calculations,we systematically investigated the structural,electronic,and superconducting properties of Fm3m and F43m phases of Li_(2)MB(M=alkaline earth,3d,and 4d metals).Our analysis of 48 Li_(2)MB compounds at 0-60 GPa reveals that four of them are promising superconductors with TC≥10 K.It is further demonstrated that substitution of different M elements serves as an effective strategy for electron doping,enabling precise control of the band structure and density of states near the Fermi level for the F43m phase.This behavior is exemplified in Li_(2)Sc_(1-x)Ti_(x)B(x=0.05-0.25),which transforms from a semiconductor into a metal and further into a superconductor with increasing Ti doping concentration.For the Fm3m phase,Dirac points near the Fermi level are observed in the M=Sc and Y systems,suggesting unique electronic behavior.Our work provides deep insight into the superconducting mechanisms of lithium-based borides and offers guidance for the targeted design of novel boride superconductors.
文摘本文针对矿井传统贯通测量技术在复杂地质条件和长距离作业中面临的累积误差大、数据可靠性低等难题,系统研究了高精度贯通测量技术体系的构建与应用。通过融合卡尔曼滤波动态数据处理算法、三维激光扫描等先进感知设备和北斗-超宽带(Ultra Wide Band,UWB)天地协同定位技术,构建“天—地—井”一体化智能测量体系;基于“建筑信息模型(Building Information Modeling,BIM)+地理信息系统(Geographic Information System,GIS)”智能决策平台,进行三维建模与数字孪生预演,并在千米深井与超长距离贯通工程中开展应用验证。结果表明,该技术可以有效缩小测量误差、提升工程效率并降低安全风险,为智慧矿山建设提供了可靠的技术支撑。
