Persistent charge-density-wave order in single-layer TaSe2

Title
Persistent charge-density-wave order in single-layer TaSe2
Authors
류혜진Yi ChenHeejung KimHsin-zon TsaiShujie TangJuan JiangSalman KahnFranklin LiouCaihong JiaJi Hoon ShimZahid HussainZhi-Xun ShenKyoo KimB. I. MinChoongyu HwangMichael F. CrommieSung-Kwan MoArash A. Omrani
Issue Date
2018-02
Publisher
Nano letters
Citation
VOL 18-694
Abstract
We present the electronic characterization of single-layer 1H-TaSe2 grown by molecular beam epitaxy using a combined angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 × 3 charge-density-wave (CDW) order persists despite distinct changes in the low energy electronic structure highlighted by the reduction in the number of bands crossing the Fermi energy and the corresponding modification of Fermi surface topology. Enhanced spin– orbit coupling and lattice distortion in the single-layer play a crucial role in the formation of CDW order. Our findings provide a deeper understanding of the nature of CDW order in the two-dimensional limit.
URI
http://pubs.kist.re.kr/handle/201004/70269
ISSN
1530-6984
Appears in Collections:
KIST Publication > Article
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