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@ARTICLE{Liu:885982,
author = {Liu, Shuyuan and Wang, Chongze and Liu, Liangliang and
Choi, Jin-Ho and Kim, Hyun-Jung and Jia, Yu and Park, Chul
Hong and Cho, Jun-Hyung},
title = {{F}erromagnetic {W}eyl {F}ermions in {T}wo-{D}imensional
{L}ayered {E}lectride {G}d2{C}},
journal = {Physical review letters},
volume = {125},
issn = {0031-9007},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2020-04209},
pages = {187203},
year = {2020},
abstract = {Recently, two-dimensional layered electrides have emerged
as a new class of materials which possess anionic electrons
in the interstitial spaces between cationic layers. Here,
based on first-principles calculations, we discover a
time-reversal-symmetry-breaking Weyl semimetal phase in a
unique two-dimensional layered ferromagnetic (FM) electride
Gd2C. It is revealed that the crystal field mixes the
interstitial electron states and Gd−5d orbitals near the
Fermi energy to form band inversions. Meanwhile, the FM
order induces two spinful Weyl nodal lines (WNLs), which are
converted into multiple pairs of Weyl nodes through
spin-orbit coupling. Further, we not only identify Fermi-arc
surface states connecting the Weyl nodes but also predict a
large intrinsic anomalous Hall conductivity due to the Berry
curvature produced by the gapped WNLs. Our findings
demonstrate the existence of Weyl fermions in the
room-temperature FM electride Gd2C, therefore offering a new
platform to investigate the intriguing interplay between
electride materials and magnetic Weyl physics.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33196220},
UT = {WOS:000583031900003},
doi = {10.1103/PhysRevLett.125.187203},
url = {https://juser.fz-juelich.de/record/885982},
}