These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2Si.
    Author: Feng B, Fu B, Kasamatsu S, Ito S, Cheng P, Liu CC, Feng Y, Wu S, Mahatha SK, Sheverdyaeva P, Moras P, Arita M, Sugino O, Chiang TC, Shimada K, Miyamoto K, Okuda T, Wu K, Chen L, Yao Y, Matsuda I.
    Journal: Nat Commun; 2017 Oct 18; 8(1):1007. PubMed ID: 29044100.
    Abstract:
    Topological nodal line semimetals, a novel quantum state of materials, possess topologically nontrivial valence and conduction bands that touch at a line near the Fermi level. The exotic band structure can lead to various novel properties, such as long-range Coulomb interaction and flat Landau levels. Recently, topological nodal lines have been observed in several bulk materials, such as PtSn4, ZrSiS, TlTaSe2 and PbTaSe2. However, in two-dimensional materials, experimental research on nodal line fermions is still lacking. Here, we report the discovery of two-dimensional Dirac nodal line fermions in monolayer Cu2Si based on combined theoretical calculations and angle-resolved photoemission spectroscopy measurements. The Dirac nodal lines in Cu2Si form two concentric loops centred around the Γ point and are protected by mirror reflection symmetry. Our results establish Cu2Si as a platform to study the novel physical properties in two-dimensional Dirac materials and provide opportunities to realize high-speed low-dissipation devices.
    [Abstract] [Full Text] [Related] [New Search]