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Effects of Dirac cone tilt in a two-dimensional Dirac semimetal
Yang, Zhao-Kun1; Wang, Jing-Rong2; Liu, Guo-Zhu1
2018-11-19
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号98期号:19页码:20
通讯作者Liu, Guo-Zhu(gzliu@ustc.edu.cn)
摘要A two-dimensional Dirac semimetal with tilted Dirac cone has recently attracted increasing interest. The tilt of Dirac cone can be realized in a number of materials, including deformed graphene, surface state of topological crystalline insulator, and certain organic compounds. We study how Dirac cone tilting affects the low-energy properties by presenting a renormalization group analysis of the Coulomb interaction and quenched disorder. A random scalar potential or random vector potential along the tilting direction cannot exist on its own as it always dynamically generates a new type of disorder, which dominates at low energies and turns the system into a compressible diffusive metal. Consequently, the fermions acquire a finite disorder scattering rate. Moreover, the isolated band-touching point is replaced by a bulk Fermi arc in the Brillouin zone. These results are not qualitatively changed when the Coulomb interaction is incorporated. In comparison, random mass and random vector potential along the nontilting direction can exist individually, without generating other types of disorder. They both suppress tilt at low energies, and do not produce bulk Fermi arc. Upon taking the Coulomb interaction into account, the system enters into a stable quantum critical state, in which the fermion field acquires a finite anomalous dimension but the dynamical exponent z = 1. These results indicate that Dirac cone tilt does lead to some qualitatively different low-energy properties compared to the untilted system.
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province
DOI10.1103/PhysRevB.98.195123
关键词[WOS]TOPOLOGICAL PHASE-TRANSITIONS ; HALL CRITICAL-POINTS ; WEYL SEMIMETALS ; QUANTUM CRITICALITY ; SUSPENDED GRAPHENE ; FERMIONS ; INSULATORS ; SYSTEMS
收录类别SCI
语种英语
资助项目National Natural Science Foundation of China[11574285] ; National Natural Science Foundation of China[11504379] ; Fundamental Research Funds for the Central Universities (P. R. China)[WK2030040085] ; Natural Science Foundation of Anhui Province[1608085MA19]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Fundamental Research Funds for the Central Universities (P. R. China) ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province
WOS研究方向Materials Science ; Physics
WOS类目Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000450547800001
出版者AMER PHYSICAL SOC
引用统计
文献类型期刊论文
条目标识符http://ir.hfcas.ac.cn:8080/handle/334002/34388
专题中科院强磁场科学中心
通讯作者Liu, Guo-Zhu
作者单位1.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, High Magnet Field Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China
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GB/T 7714
Yang, Zhao-Kun,Wang, Jing-Rong,Liu, Guo-Zhu. Effects of Dirac cone tilt in a two-dimensional Dirac semimetal[J]. PHYSICAL REVIEW B,2018,98(19):20.
APA Yang, Zhao-Kun,Wang, Jing-Rong,&Liu, Guo-Zhu.(2018).Effects of Dirac cone tilt in a two-dimensional Dirac semimetal.PHYSICAL REVIEW B,98(19),20.
MLA Yang, Zhao-Kun,et al."Effects of Dirac cone tilt in a two-dimensional Dirac semimetal".PHYSICAL REVIEW B 98.19(2018):20.
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