Discovery of aWeyl fermion state with Fermi arcs in niobium arsenide
نویسندگان
چکیده
Su-Yang Xu1,2†, Nasser Alidoust1,2†, Ilya Belopolski1,2†, Zhujun Yuan3, Guang Bian1, Tay-Rong Chang1,4, Hao Zheng1, Vladimir N. Strocov5, Daniel S. Sanchez1, Guoqing Chang6,7, Chenglong Zhang3, Daixiang Mou8,9, YunWu8,9, Lunan Huang8,9, Chi-Cheng Lee6,7, Shin-Ming Huang6,7, BaoKai Wang6,7,10, Arun Bansil10, Horng-Tay Jeng4,11, Titus Neupert12, Adam Kaminski8,9, Hsin Lin6,7, Shuang Jia3,13 and M. Zahid Hasan*
منابع مشابه
Experimental discovery of a topological Weyl semimetal state in TaP
Weyl semimetals are expected to open up new horizons in physics and materials science because they provide the first realization of Weyl fermions and exhibit protected Fermi arc surface states. However, they had been found to be extremely rare in nature. Recently, a family of compounds, consisting of tantalum arsenide, tantalum phosphide (TaP), niobium arsenide, and niobium phosphide, was predi...
متن کاملنظریه میدان میانگین برای ابررسانایی مسی دمای بالا
Two decades ago the epoch making discovery of high Tc cuprate superconductivity by Bednorz and Müller shocked the world’s superconductivity community. However, already in 1979 and 1980, the first heavy fermion superconductor CeCu2Si2 and organic superconductor (TMTSF)2PF6 have been discovered respectively. Also we know now that all these superconductors are unconventional and nodal. Further t...
متن کاملA Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
Weyl fermions are massless chiral fermions that play an important role in quantum field theory but have never been observed as fundamental particles. A Weyl semimetal is an unusual crystal that hosts Weyl fermions as quasiparticle excitations and features Fermi arcs on its surface. Such a semimetal not only provides a condensed matter realization of the anomalies in quantum field theories but a...
متن کاملساختار الکترونی ترکیبات فرمیون سنگین M = Co, Rh) PuMGa5 )
Electronic properties of heavy Fermion superconductors PuCoGa5 and PuRhGa5 consisting of density of states, band structure and the Fermi surface have been calculated based on density functional theory in the local spin density approximation plus on site Coulomb correlation (LSDA+U). Calculated density of states is in overall consistency with a photo emission experiment. The bands with f charac...
متن کاملSurface to bulk Fermi arcs via Weyl nodes as topological defects
A hallmark of Weyl semimetal is the existence of surface Fermi arcs. An intriguing question is what determines the connectivity of surface Fermi arcs, when multiple pairs of Weyl nodes are present. To answer this question, we show that the locations of surface Fermi arcs are predominantly determined by the condition that the Zak phase integrated along the normal-to-surface direction is . The Za...
متن کامل