Persistent Charge-Density-Wave Order in Single-Layer TaSe 2

Ryu, Hyejin; Chen, Yi; Kim, Heejung; Tsai, Hsin -Zon; Tang, Shujie; Jiang, Juan; Liou, Franklin; Kahn, Salman; Jia, Caihong; Omrani, Arash A.; Shim, Ji Hoon; Hussain, Zahid; Shen, Zhi -Xun; Kim, Kyoo; Min, Byung Il; Hwang, Choongyu; Crommie, Michael F.; Mo, Sung -Kwan

doi:10.1021/acs.nanolett.7b03264

Title: Persistent Charge-Density-Wave Order in Single-Layer TaSe ₂

Journal Article · Thu Jan 04 00:00:00 EST 2018 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.7b03264· OSTI ID:1471522

^[1]; Chen, Yi ^[2]; Kim, Heejung ^[3]; Tsai, Hsin -Zon ^[2]; Tang, Shujie ^[4]; Jiang, Juan ^[5]; Liou, Franklin ^[2]; Kahn, Salman ^[2]; Jia, Caihong ^[6]; Omrani, Arash A. ^[2]; Shim, Ji Hoon ^[3];

^[5]; Shen, Zhi -Xun ^[7]; Kim, Kyoo ^[3]; Min, Byung Il ^[3]; Hwang, Choongyu ^[8];

^[9];

^[5]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pohang Univ. of Science and Technology, Pohang (Korea)
Univ. of California, Berkeley, CA (United States)
Pohang Univ. of Science and Technology, Pohang (Korea)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Henan Univ., Keifeng (People's Republic of China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Stanford Univ., Stanford, CA (United States)
Pusan National Univ., Busan (Korea)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; 2015R1A2A1A15053564; 2016K1A4A4A01922028; AC02-05CH11231

OSTI ID:: 1471522

Alternate ID(s):: OSTI ID: 1471447; OSTI ID: 1530339

Journal Information:: Nano Letters, Vol. 18, Issue 2; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 85 works

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Title: Persistent Charge-Density-Wave Order in Single-Layer TaSe 2

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