@article{cea44d96ccc643e793b01de1c045dc79,
title = "Topological Lifshitz transitions and Fermi arc manipulation in Weyl semimetal NbAs",
abstract = "Surface Fermi arcs (SFAs), the unique open Fermi-surfaces (FSs) discovered recently in topological Weyl semimetals (TWSs), are unlike closed FSs in conventional materials and can give rise to many exotic phenomena, such as anomalous SFA-mediated quantum oscillations, chiral magnetic effects, three-dimensional quantum Hall effect, non-local voltage generation and anomalous electromagnetic wave transmission. Here, by using in-situ surface decoration, we demonstrate successful manipulation of the shape, size and even the connections of SFAs in a model TWS, NbAs, and observe their evolution that leads to an unusual topological Lifshitz transition not caused by the change of the carrier concentration. The phase transition teleports the SFAs between different parts of the surface Brillouin zone. Despite the dramatic surface evolution, the existence of SFAs is robust and each SFA remains tied to a pair of Weyl points of opposite chirality, as dictated by the bulk topology.",
author = "Yang, {H. F.} and Yang, {L. X.} and Liu, {Z. K.} and Y. Sun and C. Chen and H. Peng and M. Schmidt and D. Prabhakaran and Bernevig, {B. A.} and C. Felser and Yan, {B. H.} and Chen, {Y. L.}",
note = "We thank John A. McGuire for polishing the writing of this paper. This work was supported by the National Key R&D program of China (No. 2017YFA0305400), Shanghai Municipal Science and Technology Major Project (Grant 2018SHZDZX02), and the National Natural Science Foundation of China (Grants No. 11774190, No. 11674229 and No. 11634009). Y.L.C. acknowledges the insightful discussion with Siddharth Parameswaran. Y.L.C. and L.X.Y. acknowledge the support from Tsinghua University Initiative Scientific Research Program. B.A.B. acknowledges an early discussion with Ady Stern in Banff, 2015, where he was introduced to the idea of changing the Fermi arc topology of a Dirac semimetal. B.A.B. was supported by Department of Energy de-sc0016239, Simons Investigator Award, the Packard Foundation, and the Schmidt Fund for Innovative Research, NSF EAGER grant DMR-1643312, ONR-N00014–14–1–0330, ARO MURI W911NF-12–1–0461, NSF-MRSEC DMR-1420541. C.F. acknowledges financial support by the ERC Advanced Grant (No 291472 {\textquoteleft}Idea Heusler{\textquoteright}). B.Y. is supported by a research grant from the Benoziyo Endowment Fund for the Advancement of Science and by a Grant from the German-Israeli Foundation for Scientific Research and Development (GIF Grant no. I-1364–303.7/2016). H.F.Y. acknowledges financial support from the China Postdoctoral Science Foundation (Grant No. 2017M611635). Data of this work were taken at Diamond Light Source (Beamline I05, proposal No. SI19310 and SI18005) and Shanghai Synchrotron Radiation Facility (Beamline 03U, supported by National Natural Science Foundation of China, contract No. 11227902).",
year = "2019",
month = aug,
day = "2",
doi = "10.1038/s41467-019-11491-4",
language = "الإنجليزيّة",
volume = "10",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Research",
number = "1",
}