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Three-terminal Weyl complex with double surface arcs in a cubic lattice
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作者 Zhenqiao Huang Zhongjia Chen +1 位作者 baobing zheng Hu Xu 《npj Computational Materials》 SCIE EI CSCD 2020年第1期940-946,共7页
Exploring unconventional topological quasiparticles and their associated exotic physical properties has become a hot topic in condensed matter physics,thus stimulating extensive interest in recent years.Here,in contra... Exploring unconventional topological quasiparticles and their associated exotic physical properties has become a hot topic in condensed matter physics,thus stimulating extensive interest in recent years.Here,in contrast to the double-Weyl phonons(the topological chiral charge+2)in the trigonal and hexagonal crystal systems,we propose that the unconventional double-Weyl without counterparts in high-energy physics can emerge in the phonons of cubic structures,i.e.,SrSi_(2). 展开更多
关键词 CUBIC DOUBLE TOPOLOGICAL
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Tunable ferromagnetic Weyl fermions from a hybrid nodal ring
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作者 baobing zheng Bowen Xia +4 位作者 Rui Wang Jinzhu Zhao Zhongjia Chen Yujun Zhao Hu Xu 《npj Computational Materials》 SCIE EI CSCD 2019年第1期516-522,共7页
Realization of nontrivial band topology in condensed matter systems is of great interest in recent years.Using first-principles calculations and symmetry analysis,we propose an exotic topological phase with tunable fe... Realization of nontrivial band topology in condensed matter systems is of great interest in recent years.Using first-principles calculations and symmetry analysis,we propose an exotic topological phase with tunable ferromagnetic Weyl fermions in a halfmetallic oxide CrP_(2)O_(7).In the absence of spin–orbit coupling(SOC),we reveal that CrP_(2)O_(7) possesses a hybrid nodal ring.When SOC is present,the spin-rotation symmetry is broken.As a result,the hybrid nodal ring shrinks to discrete nodal points and forms different types of Weyl points.The Fermi arcs projected on the(100)surface are clearly visible,which can contribute to the experimental study for the topological properties of CrP_(2)O_(7).In addition,the calculated quasiparticle interference patterns are also highly desirable for the experimental study of CrP_(2)O_(7).Our findings provide a good candidate of ferromagnetic Weyl semimetals,and are expected to realize related topological applications with their attracted features. 展开更多
关键词 FERROMAGNETIC NODAL TOPOLOGICAL
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