Quantum diffusion of massive Dirac fermions induced by symmetry breaking

doi:10.1103/PhysRevB.104.075427

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	Quantum diffusion of massive Dirac fermions induced by symmetry breaking
	Zhang, Ting 1; Tian, Chushun 2,3; Sheng, Ping 1
刊名	PHYSICAL REVIEW B
	2021
卷号	104 期号:7 页码:75427
关键词	TRANSPORT LOCALIZATION
ISSN号	2469-9950
DOI	10.1103/PhysRevB.104.075427
英文摘要	We show that when a two-dimensional (2D) Dirac fermion moves in disordered environments, the weak time-reversal symmetry breaking by a small mass gives rise to the diffusive wave propagation, i.e., that the wave-packet spread obeys the diffusive law of Einstein, up to a-practically inaccessible-exponentially large length. Strikingly, the diffusion constant is larger than that given by the Boltzmann kinetic theory, and grows unboundedly as the energy-to-mass ratio increases. This diffusive phenomenon is of quantum nature and different from weak antilocalization. It implies a new type of transport in topological insulators at zero temperature.
学科主题	Materials Science ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27454]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Inst Adv Study, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ting,Tian, Chushun,Sheng, Ping. Quantum diffusion of massive Dirac fermions induced by symmetry breaking[J]. PHYSICAL REVIEW B,2021,104(7):75427.
APA	Zhang, Ting,Tian, Chushun,&Sheng, Ping.(2021).Quantum diffusion of massive Dirac fermions induced by symmetry breaking.PHYSICAL REVIEW B,104(7),75427.
MLA	Zhang, Ting,et al."Quantum diffusion of massive Dirac fermions induced by symmetry breaking".PHYSICAL REVIEW B 104.7(2021):75427.