skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

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.

Authors:
ORCiD logo [1];  [2];  [3];  [2];  [4];  [5];  [2];  [2];  [6];  [2];  [3]; ORCiD logo [5];  [7];  [3];  [3];  [8]; ORCiD logo [9]; ORCiD logo [5]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pohang Univ. of Science and Technology, Pohang (Korea)
  2. Univ. of California, Berkeley, CA (United States)
  3. Pohang Univ. of Science and Technology, Pohang (Korea)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Univ. of California, Berkeley, CA (United States); Henan Univ., Keifeng (People's Republic of China)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Stanford Univ., Stanford, CA (United States)
  8. Pusan National Univ., Busan (Korea)
  9. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
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 Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1471522
Alternate Identifier(s):
OSTI ID: 1471447; OSTI ID: 1530339
Grant/Contract Number:  
AC02-76SF00515; 2015R1A2A1A15053564; 2016K1A4A4A01922028; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 18; Journal Issue: 2; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 2D materials; ARPES; CDW; charge density wave; MBE; STM; TaSe2; Transition metal dichalcogenides; 36 MATERIALS SCIENCE

Citation Formats

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., and Mo, Sung -Kwan. Persistent Charge-Density-Wave Order in Single-Layer TaSe 2. United States: N. p., 2018. Web. doi:10.1021/acs.nanolett.7b03264.
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. Persistent Charge-Density-Wave Order in Single-Layer TaSe 2. United States. https://doi.org/10.1021/acs.nanolett.7b03264
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., and Mo, Sung -Kwan. 2018. "Persistent Charge-Density-Wave Order in Single-Layer TaSe 2". United States. https://doi.org/10.1021/acs.nanolett.7b03264. https://www.osti.gov/servlets/purl/1471522.
@article{osti_1471522,
title = {Persistent Charge-Density-Wave Order in Single-Layer TaSe 2},
author = {Ryu, Hyejin and Chen, Yi and Kim, Heejung and Tsai, Hsin -Zon and Tang, Shujie and Jiang, Juan and Liou, Franklin and Kahn, Salman and Jia, Caihong and Omrani, Arash A. and Shim, Ji Hoon and Hussain, Zahid and Shen, Zhi -Xun and Kim, Kyoo and Min, Byung Il and Hwang, Choongyu and Crommie, Michael F. and Mo, Sung -Kwan},
abstractNote = {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.},
doi = {10.1021/acs.nanolett.7b03264},
url = {https://www.osti.gov/biblio/1471522}, journal = {Nano Letters},
issn = {1530-6984},
number = 2,
volume = 18,
place = {United States},
year = {Thu Jan 04 00:00:00 EST 2018},
month = {Thu Jan 04 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 85 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1. Figure 1.: Growth of epitaxial single-layer 1H-TaSe2 film. (a) Crystal structure 1H-TaSe2 single-layer film on bilayer graphene 6H-SiC(0001) from top view and (b) side view. (c) RHEED pattern of epitaxial bilayer graphene on 6H-SiC(0001) substrate and (d) 0.9 monolayer (ML, 0.9 ML means that 90% area of the substrate surfacemore » was covered by single-layer TaSe2) 1H-TaSe2 film. (e) LEED pattern of 0.9 ML 1H-TaSe2 film. (f) Core-level spectra of 1H-TaSe2 single-layer taken at 15 K with 80 eV photon energy. (g) Large-scale STM image of 0.9 ML 1H-TaSe2/BLG (Vb = 1 V, It = 1 pA, T = 5 K). (h) Atomically resolved STM image of single-layer 1H-TaSe2 shows 3 x 3 CDW order (Vb = 50 mV, It = 180 pA, T = 5K).« less

Save / Share:

Works referenced in this record:

Synthesis and chemistry of elemental 2D materials
journal, January 2017


Two-dimensional semiconductors for transistors
journal, August 2016


2D materials and van der Waals heterostructures
journal, July 2016


On the origin of charge-density waves in select layered transition-metal dichalcogenides
journal, May 2011


The dynamics of charge-density waves
journal, October 1988


Quasiparticle Interference, Quasiparticle Interactions, and the Origin of the Charge Density Wave in 2 H NbSe 2
journal, January 2015


k -resolved susceptibility function of 2 H -TaSe 2 from angle-resolved photoemission
journal, July 2013


Fermi-surface nesting and the origin of the charge-density wave in Nb Se 2
journal, May 2006


Characterization of collective ground states in single-layer NbSe2
journal, November 2015


Spin–valley locking in the normal state of a transition-metal dichalcogenide superconductor
journal, May 2016


Strongly enhanced charge-density-wave order in monolayer NbSe2
journal, July 2015


Ising pairing in superconducting NbSe2 atomic layers
journal, November 2015


Charge density waves and superconductivity in 2H-TaSe2
journal, May 1996


Na and Cs intercalation of 2H-TaSe 2 studied by photoemission
journal, October 2001


Pseudogap and Charge Density Waves in Two Dimensions
journal, May 2008


Fermi surface, charge-density-wave gap, and kinks in 2 H TaSe 2
journal, September 2005


A simple effective potential for exchange
journal, June 2006


Charge density wave transition in single-layer titanium diselenide
journal, November 2015


Study of Superlattice Formation in 2 H -Nb Se 2 and 2 H -Ta Se 2 by Neutron Scattering
journal, March 1975


Quantum phase transition from triangular to stripe charge order in NbSe2
journal, January 2013


Scanning tunnelling microscopy of charge-density waves in transition metal chalcogenides
journal, December 1988


Superconductivity at the Two-Dimensional Limit
journal, April 2009


Giant phonon-induced conductance in scanning tunnelling spectroscopy of gate-tunable graphene
journal, July 2008


Theory and Application for the Scanning Tunneling Microscope
journal, June 1983


Large-scale uniform bilayer graphene prepared by vacuum graphitization of 6H-SiC(0001) substrates
journal, January 2013


Unfolding First-Principles Band Structures
journal, May 2010


Works referencing / citing this record:

Single anisotropic gap superconductivity and proximity effect in PbTaSe 2
journal, December 2019


Distinctive Performance of Terahertz Photodetection Driven by Charge‐Density‐Wave Order in CVD‐Grown Tantalum Diselenide
journal, September 2019


The Computational 2D Materials Database: high-throughput modeling and discovery of atomically thin crystals
journal, September 2018


Morphology‐controlled Tantalum Diselenide Structures as Self‐optimizing Hydrogen Evolution Catalysts
journal, March 2020


Strong correlations and orbital texture in single-layer 1T-TaSe2
journal, January 2020


Role of Charge Density Wave in Monatomic Assembly in Transition Metal Dichalcogenides
journal, February 2019


Chemical Vapor Deposition Grown Wafer-Scale 2D Tantalum Diselenide with Robust Charge-Density-Wave Order
journal, September 2018


Strain-controlled magnetic and optical properties of monolayer 2 H TaS e 2
journal, August 2019


Multivalley Free Energy Landscape and the Origin of Stripe and Quasi-Stripe CDW Structures in Monolayer MX2 Compounds
journal, January 2020


Controlling the Charge Density Wave Transition in Monolayer TiSe 2 : Substrate and Doping Effects
journal, October 2018


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.