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Title: Suppression of Stacking Order with Doping in 1T-TaS2–xSex

Journal Article · · Condensed Matter

In 1T-TaS2–xSex, the charge density wave (CDW) state features a star of David lattice that expands across layers as the system becomes commensurate upon cooling. The layers can also order along the c-axis, and different stacking orders have been proposed. For this work, using neutron scattering on powder samples, we compared the stacking order previously observed in 1T-TaS2 when the system is doped with Se. While at low temperature, a 13c layer sequence stacking was observed in TaS2; this type of ordering was not evident with doping. Doping with Se results in a metallic state in which the Mott transition is suppressed, which may be linked to the absence of layer stacking.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2251568
Journal Information:
Condensed Matter, Journal Name: Condensed Matter Journal Issue: 4 Vol. 8; ISSN 2410-3896
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (43)

Superconductivity induced by Se-doping in layered charge-density-wave system 1 T -TaS 2− x Se x journal May 2013
On electrically tunable stacking domains and ferroelectricity in moiré superlattices journal January 2022
Stacking-driven gap formation in layered 1 T - TaS 2 journal November 2018
Ferromagnetism emerged from non-ferromagnetic atomic crystals journal June 2023
Electrical, structural and magnetic properties of pure and doped 1T-TaS 2 journal March 1979
X-ray crystal-structure refinement of the nearly commensurate phase of 1 T − TaS 2 in ( 3 + 2 ) -dimensional superspace journal December 1997
Combined investigation of collective amplitude and phase modes in a quasi-one-dimensional charge density wave system over a wide spectral range journal July 2023
Charge-density waves and superlattices in the metallic layered transition metal dichalcogenides journal March 1975
The role of charge density waves in structural transformations of 1T TaS 2 journal February 1975
Local structure anomaly with the charge ordering transition of 1T−TaS2 journal May 2023
Pseudogapped Fermi surfaces of 1 T − TaS 2 and 1 T − TaSe 2 : A charge density wave effect journal March 2004
Emergence of coherence in the charge-density wave state of 2H-NbSe2 journal February 2015
Band structures of the layer compounds 1T-TaS 2 and 2H-TaSe 2 in the presence of commensurate charge-density waves journal June 1985
Atomic structure and Mott nature of the insulating charge density wave phase of 1T-TaS2 journal June 2022
On the Phase Transitions in 1 T -TaS 2 journal January 1989
General Theory for Bilayer Stacking Ferroelectricity journal April 2023
From Mott state to superconductivity in 1T-TaS2 journal November 2008
Structural analysis of complex materials using the atomic pair distribution function — a practical guide journal January 2003
Spectral Consequences of Broken Phase Coherence in 1T- TaS_{2} journal August 1998
Stacking-engineered ferroelectricity in bilayer boron nitride journal May 2021
Collective modes in the charge density wave state of K0.3MoO3 : Role of long-range Coulomb interactions revisited journal July 2023
Atomistic origin of an ordered superstructure induced superconductivity in layered chalcogenides journal January 2015
Nature of charge density waves and superconductivity in 1 T − TaSe 2 − x Te x journal July 2016
EXPGUI , a graphical user interface for GSAS journal April 2001
Coexistence of ferromagnetism and superconductivity in CeO 0.3 F 0.7 BiS 2 journal December 2014
Band insulator to Mott insulator transition in 1T-TaS2 journal August 2020
Ambipolar Thickness-Dependent Thermoelectric Measurements of WSe2 journal May 2023
Charge-Density Waves in Metallic, Layered, Transition-Metal Dichalcogenides journal April 1974
Understanding the Mott insulating state in 1T-TaS2 and 1T-TaSe2 journal July 2022
Hidden CDW states and insulator-to-metal transition after a pulsed femtosecond laser excitation in layered chalcogenide 1T-TaS 2− x Se x journal July 2018
Underneath the Bragg Peaks journal June 2003
Coexistence of Superconductivity and Charge Density Waves in Tantalum Disulfide: Experiment and Theory journal October 2020
PDFgetN : a user-friendly program to extract the total scattering structure factor and the pair distribution function from neutron powder diffraction data journal August 2000
1T-TaS 2 as a quantum spin liquid journal June 2017
On the origin of charge-density waves in select layered transition-metal dichalcogenides journal May 2011
Origin of the Insulating Phase and First-Order Metal-Insulator Transition in 1 T − TaS 2 journal March 2019
An alternative interpretation of recent ARPES measurements on TiSe 2 journal February 2010
New Magnetic Superconductors: A Toy Box for Solid‐State Physicists journal October 1998
Mottness versus unit-cell doubling as the driver of the insulating state in 1T-TaS2 journal May 2020
Stacking order and driving forces in the layered charge density wave phase of 1T-MX2 (M = Nb, Ta and X = S, Se) journal April 2023
Evidence for pseudo–Jahn-Teller distortions in the charge density wave phase of 1 T − TiSe 2 journal May 2020
Orbital textures and charge density waves in transition metal dichalcogenides journal March 2015
Increase in charge-density-wave potential of1T−TaSxSe2−x journal June 2004