Quantum phase transition and unusual critical behavior in multi-Weyl semimetals
文献类型:期刊论文
作者 | Wang, Jing-Rong1; Liu, Guo-Zhu2; Zhang, Chang-Jin1,3 |
刊名 | PHYSICAL REVIEW B |
出版日期 | 2017-10-24 |
卷号 | 96期号:16页码:1-22 |
DOI | 10.1103/PhysRevB.96.165142 |
文献子类 | Article |
英文摘要 | The low-energy behaviors of gapless double- and triple-Weyl fermions caused by the interplay of long-range Coulomb interaction and quenched disorder are studied by performing a renormalization group analysis. It is found that an arbitrarily weak disorder drives the double-Weyl semimetal to undergo a quantum phase transition into a compressible diffusive metal, independent of the disorder type and the Coulomb interaction strength. In contrast, the nature of the ground state of triple-Weyl fermion system relies sensitively on the specific disorder type in the noninteracting limit: The system is turned into a compressible diffusive metal state by an arbitrarily weak random scalar potential or z component of random vector potential but exhibits stable critical behavior when there is only an x or y component of random vector potential. In case the triple-Weyl fermions couple to random scalar potential, the system becomes a diffusive metal in the weak interaction regime but remains a semimetal if Coulomb interaction is sufficiently strong. Interplay of Coulomb interaction and x, or y, component of random vector potential leads to a stable infrared fixed point that is likely to be characterized by critical behavior. When Coulomb interaction coexists with the z component of random vector potential, the system flows to the interaction-dominated strong coupling regime, which might drive a Mott insulating transition. It is thus clear that double-and triple-Weyl fermions exhibit distinct low-energy behavior in response to interaction and disorder. The physical explanation of such distinction is discussed in detail. The role played by long-range Coulomb impurity in triple-Weyl semimetal is also considered. The main conclusion is that Coulomb impurity always drives the system to become a compressible diffusive metal, whereas Coulomb interaction tends to suppress the Coulomb impurity, rendering the robustness of the semimetal phase. |
WOS关键词 | 2-DIMENSIONAL ELECTRON-SYSTEMS ; RENORMALIZATION-GROUP APPROACH ; METAL-INSULATOR-TRANSITION ; D-WAVE SUPERCONDUCTORS ; HALL CRITICAL-POINTS ; FERMION SEMIMETAL ; STATES ; TRANSPORT ; GRAPHENE ; COLLOQUIUM |
WOS研究方向 | Physics |
语种 | 英语 |
WOS记录号 | WOS:000413510900002 |
资助机构 | Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; Ministry of Science and Technology of China(2016YFA0300404 ; National Natural Science Foundation of China(11574285 ; 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源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/33816] |
专题 | 合肥物质科学研究院_中科院强磁场科学中心 |
作者单位 | 1.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China 3.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Jing-Rong,Liu, Guo-Zhu,Zhang, Chang-Jin. Quantum phase transition and unusual critical behavior in multi-Weyl semimetals[J]. PHYSICAL REVIEW B,2017,96(16):1-22. |
APA | Wang, Jing-Rong,Liu, Guo-Zhu,&Zhang, Chang-Jin.(2017).Quantum phase transition and unusual critical behavior in multi-Weyl semimetals.PHYSICAL REVIEW B,96(16),1-22. |
MLA | Wang, Jing-Rong,et al."Quantum phase transition and unusual critical behavior in multi-Weyl semimetals".PHYSICAL REVIEW B 96.16(2017):1-22. |
入库方式: OAI收割
来源:合肥物质科学研究院
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