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Vanishing Confinement Regime in Terahertz HgTe Nanocrystals Studied under Extreme Conditions of Temperature and Pressure.
Pierini, Stefano; Capitani, Francesco; Scimeca, Michael; Kozlov, Sergei; Pierucci, Debora; Alchaar, Rodolphe; Abadie, Claire; Khalili, Adrien; Cavallo, Mariarosa; Dang, Tung Huu; Zhang, Huichen; Bossavit, Erwan; Gréboval, Charlie; Avila, José; Baptiste, Benoit; Klotz, Stefan; Sahu, Ayaskanta; Feuillet-Palma, Cheryl; Xu, Xiang Zhen; Ouerghi, Abdelkarim; Ithurria, Sandrine; Utterback, James K; Sauvage, Sebastien; Lhuillier, Emmanuel.
Afiliação
  • Pierini S; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Capitani F; Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, CNRS, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.
  • Scimeca M; Synchrotron SOLEIL, Saint-Aubin, BP48, 91190 Saint-Aubin, France.
  • Kozlov S; Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York 11201, United States.
  • Pierucci D; Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin, 75005 Paris, France.
  • Alchaar R; Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, CNRS, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.
  • Abadie C; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Khalili A; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Cavallo M; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Dang TH; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Zhang H; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Bossavit E; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Gréboval C; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Avila J; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Baptiste B; Synchrotron SOLEIL, Saint-Aubin, BP48, 91190 Saint-Aubin, France.
  • Klotz S; Sorbonne Université, CNRS, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, F-75005 Paris, France.
  • Sahu A; Sorbonne Université, CNRS, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, F-75005 Paris, France.
  • Feuillet-Palma C; Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York 11201, United States.
  • Xu XZ; Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin, 75005 Paris, France.
  • Ouerghi A; Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin, 75005 Paris, France.
  • Ithurria S; Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, CNRS, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.
  • Utterback JK; Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin, 75005 Paris, France.
  • Sauvage S; Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
  • Lhuillier E; Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, CNRS, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.
J Phys Chem Lett ; 13(30): 6919-6926, 2022 Aug 04.
Article em En | MEDLINE | ID: mdl-35867700
While HgTe nanocrystals (NCs) in the mid-infrared region have reached a high level of maturity, their far-infrared counterparts remain far less studied, raising the need for an in-depth investigation of the material before efficient device integration can be considered. Here, we explore the effect of temperature and pressure on the structural, spectroscopic, and transport properties of HgTe NCs displaying an intraband absorption at 10 THz. The temperature leads to a very weak modulation of the spectrum as opposed to what was observed for strongly confined HgTe NCs. HgTe NC films present ambipolar conduction with a clear prevalence of electron conduction as confirmed by transistor and thermoelectric measurements. Under the application of pressure, the material undergoes phase transitions from the zinc blende to cinnabar phase and later to the rock salt phase which we reveal using joint X-ray diffraction and infrared spectroscopy measurements. We discuss how the pressure existence domain of each phase is affected by the particle size.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article