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Title: Pressure-induced phase transitions and insulator-metal transitions in VO 2 nanoparticles

Authors:
; ; ; ; ; ORCiD logo; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1347785
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Alloys and Compounds; Journal Volume: 709
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Li, Quanjun, Zhang, Huafang, Lin, Chuanlong, Tian, Fubo, Smith, Jesse S., Park, Changyong, Liu, Bingbing, and Shen, Guoyin. Pressure-induced phase transitions and insulator-metal transitions in VO 2 nanoparticles. United States: N. p., 2017. Web. doi:10.1016/j.jallcom.2017.03.164.
Li, Quanjun, Zhang, Huafang, Lin, Chuanlong, Tian, Fubo, Smith, Jesse S., Park, Changyong, Liu, Bingbing, & Shen, Guoyin. Pressure-induced phase transitions and insulator-metal transitions in VO 2 nanoparticles. United States. doi:10.1016/j.jallcom.2017.03.164.
Li, Quanjun, Zhang, Huafang, Lin, Chuanlong, Tian, Fubo, Smith, Jesse S., Park, Changyong, Liu, Bingbing, and Shen, Guoyin. Thu . "Pressure-induced phase transitions and insulator-metal transitions in VO 2 nanoparticles". United States. doi:10.1016/j.jallcom.2017.03.164.
@article{osti_1347785,
title = {Pressure-induced phase transitions and insulator-metal transitions in VO 2 nanoparticles},
author = {Li, Quanjun and Zhang, Huafang and Lin, Chuanlong and Tian, Fubo and Smith, Jesse S. and Park, Changyong and Liu, Bingbing and Shen, Guoyin},
abstractNote = {},
doi = {10.1016/j.jallcom.2017.03.164},
journal = {Journal of Alloys and Compounds},
number = ,
volume = 709,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}
  • Vacuum-ultraviolet reflectance and photoemission spectra of VO{sub 2}, V{sub 2}O{sub 3}, V{sub 6}O{sub 13}, and V{sub 2}O{sub 5} are measured in order to investigate the 3{ital d}-band structures and electron-correlation effects. In the case of VO{sub 2}, drastic changes in the 3{ital d} ({pi}{sup *} and {ital d}{sub {parallel}}) -band structures are found in both spectra through the metal-insulator phase transition. The {pi}{sup *} and {ital d}{sub {parallel}} bands are found at the Fermi level and {ital E}{sub {ital B}}=1.3 eV in the photoemission spectra of metallic VO{sub 2}. In the insulating phase, the {pi}{sup *} valence band in themore » photoemission spectra becomes empty and a rise of the {pi}{sup *} conduction band by about 0.5 eV is found in the reflectance spectra. This band shift through the phase transition may be a driving force of the metal-insulator transition of VO{sub 2}. The optical band gap between the {ital d}{sub {parallel}} valence and {pi}{sup *} conduction bands is obtained as 0.7 eV in the insulating phase, to which the {pi}{sup *}-{ital d}{sub {parallel}} correlation energy contributes partially.« less
  • Formation of ferroelastic twin domains in VO_2 nanosystems can strongly affect local strain distributions, and hence couple to the strain-controlled metal-insulator transition. Here we report polarized-light optical and scanning microwave microscopy studies of interrelated ferroelastic and metal-insulator transitions in single-crystalline vanadium dioxide (VO_2) quasi-two-dimensional (quasi-2D) nanoplatelets (NPls). In contrast to quasi-1D single-crystalline nanobeams, the geometric frustration results in emergence of several possible families of ferroelastic domains in NPls, thus allowing systematic studies of strain-controlled transitions in the presence of geometrical frustration. We demonstrate possibility of controlling the ferroelastic domain population by the strength of the NPl-substrate interaction, mechanical stress, andmore » by the NPl lateral size. Ferroelastic domain species and domain walls are identified based on standard group-theoretical considerations. Using variable temperature microscopy, we imaged the development of domains of metallic and semiconducting phases during the metal-insulator phase transition and non-trivial strain-driven reentrant domain formation. A long-range reconstruction of ferroelastic structures accommodating metal-insulator domain formation has been observed. These studies illustrate that complete picture of the phase transitions in single-crystalline and disordered VO_2 structures can be drawn only if both ferroelastic and metal-insulator strain effects are taken into consideration and understood.« less
  • Formation of ferroelastic twin domains in vanadium dioxide (VO{sub 2}) nanosystems can strongly affect local strain distributions, and hence couple to the strain-controlled metal-insulator transition. Here we report polarized-light optical and scanning microwave microscopy studies of interrelated ferroelastic and metal-insulator transitions in single-crystalline VO{sub 2} quasi-two-dimensional (quasi-2D) nanoplatelets (NPls). In contrast to quasi-1D single-crystalline nanobeams, the 2D geometric frustration results in emergence of several possible families of ferroelastic domains in NPls, thus allowing systematic studies of strain-controlled transitions in the presence of geometrical frustration. We demonstrate the possibility of controlling the ferroelastic domain population by the strength of the NPl-substratemore » interaction, mechanical stress, and by the NPl lateral size. Ferroelastic domain species and domain walls are identified based on standard group-theoretical considerations. Using variable temperature microscopy, we imaged the development of domains of metallic and semiconducting phases during the metal-insulator phase transition and nontrivial strain-driven reentrant domain formation. A long-range reconstruction of ferroelastic structures accommodating metal-insulator domain formation has been observed. These studies illustrate that a complete picture of the phase transitions in single-crystalline and disordered VO{sub 2} structures can be drawn only if both ferroelastic and metal-insulator strain effects are taken into consideration and understood.« less
  • Formation of ferroelastic twin domains in vanadium dioxide (VO{sub 2}) nanosystems can strongly affect local strain distributions, and hence couple to the strain-controlled metal-insulator transition. Here we report polarized-light optical and scanning microwave microscopy studies of interrelated ferroelastic and metal-insulator transitions in single-crystalline VO{sub 2} quasi-two-dimensional (quasi-2D) nanoplatelets (NPls). In contrast to quasi-1D single-crystalline nanobeams, the 2D geometric frustration results in emergence of several possible families of ferroelastic domains in NPls, thus allowing systematic studies of strain-controlled transitions in the presence of geometrical frustration. We demonstrate the possibility of controlling the ferroelastic domain population by the strength of the NPl-substratemore » interaction, mechanical stress, and by the NPl lateral size. Ferroelastic domain species and domain walls are identified based on standard group-theoretical considerations. Using variable temperature microscopy, we imaged the development of domains of metallic and semiconducting phases during the metal-insulator phase transition and nontrivial strain-driven reentrant domain formation. A long-range reconstruction of ferroelastic structures accommodating metal-insulator domain formation has been observed. These studies illustrate that a complete picture of the phase transitions in single-crystalline and disordered VO{sub 2} structures can be drawn only if both ferroelastic and metal-insulator strain effects are taken into consideration and understood.« less