Suppression of the commensurate charge density wave phase in ultrathin 1T-TaS2 evidenced by Raman hyperspectral analysis

Ramos, Sergio L.  L.  M.; Plumadore, Ryan; Boddison-Chouinard, Justin; Hla, Saw Wai; Guest, Jeffrey R.; Gosztola, David J.; Pimenta, Marcos A.; Luican-Mayer, Adina

doi:10.1103/PhysRevB.100.165414

Title: Suppression of the commensurate charge density wave phase in ultrathin $1 T - {TaS}_{2}$ evidenced by Raman hyperspectral analysis

Abstract

Using temperature-dependent and low-frequency Raman spectroscopy, we address the question of how the transition from bulk to a few atomic layers affects the charge density wave (CDW) phases in 1T-TaS₂. We find that for crystals with thickness larger than approximate to 10 nm the transition temperatures between the different phases as well as the hysteresis that occurs in the thermal cycle correspond to the ones expected for a bulk sample. However, when the crystals become thinner than approximate to 10 nm, the low-temperature commensurate CDW phases can be suppressed down to the experimentally accessible temperatures (similar to 80 K) upon cooling at moderate rates (similar to 5 K min^-1). In addition, even the near commensurate CDW phase is not accessible in few-layer flakes below approximate to 4 nm for even slower cooling rates (similar to 1 K min^-1). Finally, we employ Raman hyperspectral imaging to statistically confirm these findings and consider the interlayer coupling and its dynamics to play significant roles in determining the properties of CDW systems consisting of a few unit cells in the vertical direction.

Authors:

Ramos, Sergio L. L. M. ^[1]; Plumadore, Ryan ^[2]; Boddison-Chouinard, Justin ^[2]; Hla, Saw Wai ^[3]; Guest, Jeffrey R. ^[3]; Gosztola, David J. ^[3]; Pimenta, Marcos A. ^[1]; Luican-Mayer, Adina ^[2]

Univ. Federal de Minas Gerais (UFMG), Minas Gerais (Brazil)
Univ. of Ottawa, ON (Canada)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: 2019-10-21

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Sciences and Engineering Research Council of Canada (NSERC)

OSTI Identifier:: 1607448

Grant/Contract Number:: AC02-06CH11357; RGPIN-2016-06717

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 100; Journal Issue: 16; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; charge density waves; transition-metals dichalcogenide; ultrathin films; raman spectroscopy

Citation Formats


                    Ramos, Sergio L.  L.  M., Plumadore, Ryan, Boddison-Chouinard, Justin, Hla, Saw Wai, Guest, Jeffrey R., Gosztola, David J., Pimenta, Marcos A., and Luican-Mayer, Adina. Suppression of the commensurate charge density wave phase in ultrathin 1T-TaS2 evidenced by Raman hyperspectral analysis.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevB.100.165414.

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                    Ramos, Sergio L.  L.  M., Plumadore, Ryan, Boddison-Chouinard, Justin, Hla, Saw Wai, Guest, Jeffrey R., Gosztola, David J., Pimenta, Marcos A., & Luican-Mayer, Adina. Suppression of the commensurate charge density wave phase in ultrathin 1T-TaS2 evidenced by Raman hyperspectral analysis.  United States.  https://doi.org/10.1103/PhysRevB.100.165414

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                    Ramos, Sergio L.  L.  M., Plumadore, Ryan, Boddison-Chouinard, Justin, Hla, Saw Wai, Guest, Jeffrey R., Gosztola, David J., Pimenta, Marcos A., and Luican-Mayer, Adina. Mon .  
"Suppression of the commensurate charge density wave phase in ultrathin 1T-TaS2 evidenced by Raman hyperspectral analysis".  United States.  https://doi.org/10.1103/PhysRevB.100.165414.  https://www.osti.gov/servlets/purl/1607448.

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@article{osti_1607448,

  title        = {Suppression of the commensurate charge density wave phase in ultrathin 1T-TaS2 evidenced by Raman hyperspectral analysis},

  author       = {Ramos, Sergio L.  L.  M. and Plumadore, Ryan and Boddison-Chouinard, Justin and Hla, Saw Wai and Guest, Jeffrey R. and Gosztola, David J. and Pimenta, Marcos A. and Luican-Mayer, Adina},

  abstractNote = {Using temperature-dependent and low-frequency Raman spectroscopy, we address the question of how the transition from bulk to a few atomic layers affects the charge density wave (CDW) phases in 1T-TaS2. We find that for crystals with thickness larger than approximate to 10 nm the transition temperatures between the different phases as well as the hysteresis that occurs in the thermal cycle correspond to the ones expected for a bulk sample. However, when the crystals become thinner than approximate to 10 nm, the low-temperature commensurate CDW phases can be suppressed down to the experimentally accessible temperatures (similar to 80 K) upon cooling at moderate rates (similar to 5 K min-1). In addition, even the near commensurate CDW phase is not accessible in few-layer flakes below approximate to 4 nm for even slower cooling rates (similar to 1 K min-1). Finally, we employ Raman hyperspectral imaging to statistically confirm these findings and consider the interlayer coupling and its dynamics to play significant roles in determining the properties of CDW systems consisting of a few unit cells in the vertical direction.},

  doi          = {10.1103/PhysRevB.100.165414},

  journal      = {Physical Review B},

  number       = 16,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {10}

}

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https://doi.org/10.1103/PhysRevB.100.165414

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Figures / Tables:

FIG. 1: (a) Schematic representation of the crystal structure for 1T-TaS₂. (b) Summary of the different phases in 1T-TaS₂ as a function of temperature. (c) The structure of the CCDW phase; Ta atoms arranged in the Star of David pattern. (d) 8nm x 8nm STM topographic images of a bulkmore »

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Title: Suppression of the commensurate charge density wave phase in ultrathin 1 T - TaS 2 evidenced by Raman hyperspectral analysis

Abstract

Citation Formats

Figures / Tables:

Structure and control of charge density waves in two-dimensional 1T-TaS 2 journal, November 2015

Van der Waals heterostructures journal, July 2013

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

Electron microscopy of phase transformations in 1 T - TaS 2 journal, August 1991

Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2 journal, January 2016

X-Ray Study of Charge Density Wave Structure in 1T-TaS 2 journal, February 1984

The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties journal, May 1969

Spin polarization driven by a charge-density wave in monolayer 1 T − TaS 2 journal, August 2014

Stacking of charge-density waves in 1 T transition-metal dichalcogenides journal, September 1983

Infrared and Raman studies on commensurate CDW states in transition metal dichalcogenides journal, May 1981

A metallic mosaic phase and the origin of Mott-insulating state in 1T-TaS2 journal, March 2016

Nanoscale measurement of Nernst effect in two-dimensional charge density wave material 1T-TaS 2 journal, November 2017

Comparison of the soft modes in tantalum dichalcogenides journal, May 1981

X-ray crystal-structure refinement of the nearly commensurate phase of 1 T − TaS 2 in ( 3 + 2 ) -dimensional superspace journal, December 1997

Three-dimensional metallic and two-dimensional insulating behavior in octahedral tantalum dichalcogenides journal, July 2014

Phonon anomaly at the charge ordering transition in 1 T − TaS 2 journal, September 2002

Domain-Like Incommensurate Charge-Density-Wave States and Collective Modes journal, October 1978

Zone-center phonons of bulk, few-layer, and monolayer 1 T − TaS 2 : Detection of commensurate charge density wave phase through Raman scattering journal, June 2016

Gate-tunable phase transitions in thin flakes of 1T-TaS2 journal, January 2015

Atomically Thin MoS2 A New Direct-Gap Semiconductor journal, September 2010

From Mott state to superconductivity in 1T-TaS2 journal, November 2008

1T-TaS 2 as a quantum spin liquid journal, June 2017

Controlling charge-density-wave states in nano-thick crystals of 1T-TaS2 journal, December 2014

Atomic lattice disorder in charge-density-wave phases of exfoliated dichalcogenides (1T-TaS 2 ) journal, September 2016

Distinct surface and bulk charge density waves in ultrathin 1 T − Ta S 2 journal, November 2016

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

Raman scattering from 1T-TaS2 journal, November 1976

Orbital textures and charge density waves in transition metal dichalcogenides journal, March 2015

The role of charge density waves in structural transformations of 1T TaS 2 journal, February 1975

Interplane coupling in the quasi-two-dimensional 1 T − TaS 2 journal, March 2003

Electrical, structural and magnetic properties of pure and doped 1T-TaS 2 journal, March 1979

Title: Suppression of the commensurate charge density wave phase in ultrathin $1 T - {TaS}_{2}$ evidenced by Raman hyperspectral analysis

Structure and control of charge density waves in two-dimensional 1T-TaS ₂
journal, November 2015

Van der Waals heterostructures
journal, July 2013

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

Electron microscopy of phase transformations in 1 T - ${TaS}_{2}$
journal, August 1991

Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2
journal, January 2016

X-Ray Study of Charge Density Wave Structure in 1T-TaS ₂
journal, February 1984

The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties
journal, May 1969

Spin polarization driven by a charge-density wave in monolayer $1 T − {TaS}_{2}$
journal, August 2014

Stacking of charge-density waves in $1 T$ transition-metal dichalcogenides
journal, September 1983

Infrared and Raman studies on commensurate CDW states in transition metal dichalcogenides
journal, May 1981

A metallic mosaic phase and the origin of Mott-insulating state in 1T-TaS2
journal, March 2016

Nanoscale measurement of Nernst effect in two-dimensional charge density wave material 1T-TaS ₂
journal, November 2017

Comparison of the soft modes in tantalum dichalcogenides
journal, May 1981

X-ray crystal-structure refinement of the nearly commensurate phase of $1 T - {TaS}_{2}$ in $(3 + 2)$ -dimensional superspace
journal, December 1997

Three-dimensional metallic and two-dimensional insulating behavior in octahedral tantalum dichalcogenides
journal, July 2014

Phonon anomaly at the charge ordering transition in $1 T - {TaS}_{2}$
journal, September 2002

Domain-Like Incommensurate Charge-Density-Wave States and Collective Modes
journal, October 1978

Zone-center phonons of bulk, few-layer, and monolayer $1 T − {TaS}_{2}$ : Detection of commensurate charge density wave phase through Raman scattering
journal, June 2016

Gate-tunable phase transitions in thin flakes of 1T-TaS2
journal, January 2015

Atomically Thin ${MoS}_{2}$ A New Direct-Gap Semiconductor
journal, September 2010

From Mott state to superconductivity in 1T-TaS2
journal, November 2008

1T-TaS ₂ as a quantum spin liquid
journal, June 2017

Controlling charge-density-wave states in nano-thick crystals of 1T-TaS2
journal, December 2014

Atomic lattice disorder in charge-density-wave phases of exfoliated dichalcogenides (1T-TaS ₂ )
journal, September 2016

Distinct surface and bulk charge density waves in ultrathin $1 T − Ta S_{2}$
journal, November 2016

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

Raman scattering from 1T-TaS2
journal, November 1976

Orbital textures and charge density waves in transition metal dichalcogenides
journal, March 2015

The role of charge density waves in structural transformations of 1T TaS ₂
journal, February 1975

Interplane coupling in the quasi-two-dimensional $1 T - {TaS}_{2}$
journal, March 2003

Electrical, structural and magnetic properties of pure and doped 1T-TaS ₂
journal, March 1979