【摘 要】
：
As a new type of quantum state of matter hosting low energy relativistic quasiparticles,Weyl semimetals(WSMs)have attracted significant attention for scientific community and potential quantum device applications.In this study,we present a comprehensive i
【机 构】
：
School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;School of Ph
论文部分内容阅读
As a new type of quantum state of matter hosting low energy relativistic quasiparticles,Weyl semimetals(WSMs)have attracted significant attention for scientific community and potential quantum device applications.In this study,we present a comprehensive investigation of the structural,magnetic,and transport properties of noncentrosymmetric RRAlSi(R=Sm,Ce),which have been predicted to be new magnetic WSM candidates.Both samples exhibit nonsaturated magnetoresistance,with about 900％and 80％for SmAlSi and CeAlSi,respectively,at temperature of 1.8 K and magnetic field of 9T.The carrier densities of SmAlSi and CeAlSi exhibit remarkable change around magnetic transition temperatures,signifying that the electronic states are sensitive to the magnetic ordering of rare-earth elements.At low temperatures,SmAlSi reveals prominent Shubnikov-de Haas oscillations associated with the nontrivial Berry phase.High-pressure experiments demonstrate that the magnetic order is robust and survival under high pressure.Our results would yield valuable insights into WSM physics and potentials in applications to next-generation spintronic devices in the RAlSi(R=Sm,Ce)family.
其他文献
目的:探讨急性中毒患者血液灌流治疗并发出血的临床特点和危险因素。方法:于2021年1月，分析2018年1月至2020年12月在空军军医大学第二附属医院行血液灌流治疗的196例急性中毒患者的临床资料，根据患者是否并发出血分为出血组与未出血组。应用logistic回归分析血液灌流治疗患者并发出血的危险因素。结果:共纳入出血组患者21例，未出血组175例；两组患者的性别、年龄、体重指数等一般资料差异均无统计学意义（n P>0.05）。有机磷农药（χn 2=4.56，n P=0.03
目的:评估老年慢性阻塞性肺疾病（简称慢阻肺）急性加重期营养状况，并分析急性加重的危险因素。方法:回顾分析2012年1月—2020年12月主要来自全国5家三级甲等医院（北京医院、上海华东医院、天津南开医院、浙江大学医学院附属第二医院、广州市第一人民医院）的老年慢阻肺住院患者的调查数据。根据全球慢阻肺防治倡议诊断标准（GOLD），将纳入的339例老年慢阻肺患者分为急性加重期组和稳定期组。比较两组患者入院后年龄、性别、病史、人体测量、实验室检查、营养支持情况及营养风险筛查2002（NRS2002）、全球领导人营
目的:分析医护人员健康素养水平及其影响因素。方法:采用方便抽样法，选取2021年1月5—17日上海市浦东新区人民医院、上海市浦东新区周浦医院、上海市第十人民医院崇明分院、上海市静安区闸北区中心医院4家医疗机构在岗医护人员，依据中国健康教育中心统一编订的《全国居民健康素养调查问卷》，结合医护人员职业特点自行编制电子调查问卷，问卷内容包含性别、年龄、学历、职称、是否患有慢性病等基本情况，以及基本知识和理念、健康生活方式与行为、健康技能三方面的健康素养情况，涉及科学健康观、传染病防治素养、慢性病防治素养、安全与
Mn-based superconductors are very rare and their superconductivity has only been reported in three-dimensional MnP and quasi-one-dimensional KMn6Bi5 and RbMn6Bi5 with[Mn6Bi5]-columns under high pressures.Here we report the synthesis,magnetism,electrical r
Two-dimensional electron gas(2DEG)with high electron mobility is highly desired to study the emergent prop-erties and to enhance future device performance.Here we report the formation of 2DEG with high mobility at the interface between rock-salt BaO and p
山东第一医科大学第二附属医院于2020年1月14日收治1例口服石硫合剂中毒患者，患者以紫绀、意识障碍为首发表现，伴有代谢性酸中毒、休克、高钙血症以及严重肝功能、心肌损害，予以洗胃、血液净化、亚甲蓝应用及纠正休克、脏器支持等治疗，效果欠佳。最终患者家属要求出院，随访患者当日死亡。“,”The Second Affiliated Hospital of Shandong First Medical University treated a patient with oral sulfur mixture po
The CsV3Sb5 kagome lattice holds the promise for manifesting electron correlation,topology and superconduc-tivity.However,by far only three CsV3Sb5-like kagome materials have been experimentally spotted.We enlarge this family of materials to 1386 compound
大数据时代的到来为诸多领域带来了新的发展机遇,具体到地理教学上,如何充分应用新型技术为地理教学助力,并最大限度地规避不良影响是学校和地理教师需重点思考的问题,而解决这一问题的关键就是要做好地理课堂教学的优化设计.《地理教育》刊物中《新探索》《新课堂》等栏目的相关文献,可为地理课堂教学优化设计提供借鉴和参考.
In marginally twisted bilayer graphene,the Moiré pattern consists of the maximized AB(BA)stacking regions,minimized A A stacking regions and triangular networks of domain walls.Here we realize the strain-modulated electronic structures of marginally twist
We investigate the spin Hall magnetoresistance(SMR)in all-antiferromagnetic heterostructures α-Fe2O3/Cr2O3 with Pt contacts.When the temperature is ultralow(＜50 K),the spin current generated in the Pt layer cannot be transmitted through Cr2O3(t=4nm),and t