scholarly journals Metal-Insulator Phase Transition in Quasi-One-Dimensional VO2Structures

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Woong-Ki Hong ◽  
SeungNam Cha ◽  
Jung Inn Sohn ◽  
Jong Min Kim
Keyword(s):  
Advanced Technology ◽  
Research Progress ◽  
Strongly Correlated ◽  
Metal Insulator ◽  
One Dimensional ◽  
Electrical And Magnetic Properties ◽  
Wide Range ◽  
Strongly Correlated Oxides ◽  
Insulator Phase Transition ◽  
Flexible Strain Sensor

The metal-insulator transition (MIT) in strongly correlated oxides has attracted considerable attention from both theoretical and experimental researchers. Among the strongly correlated oxides, vanadium dioxide (VO2) has been extensively studied in the last decade because of a sharp, reversible change in its optical, electrical, and magnetic properties at approximately 341 K, which would be possible and promising to develop functional devices with advanced technology by utilizing MITs. However, taking the step towards successful commercialization requires the comprehensive understanding of MIT mechanisms, enabling us to manipulate the nature of transitions. In this regard, recently, quasi-one-dimensional (quasi-1D) VO2structures have been intensively investigated due to their attractive geometry and unique physical properties to observe new aspects of transitions compared with their bulk counterparts. Thus, in this review, we will address recent research progress in the development of various approaches for the modification of MITs in quasi-1D VO2structures. Furthermore, we will review recent studies on realizing novel functional devices based on quasi-1D VO2structures for a wide range of applications, such as a gas sensor, a flexible strain sensor, an electrical switch, a thermal memory, and a nonvolatile electrical memory with multiple resistance.

Disappearance of the quasi-one-dimensional plasmon at the metal-insulator phase transition of indium atomic wires

2008 ◽  
Vol 77 (20) ◽  
Author(s):  
Canhua Liu ◽  
Takeshi Inaoka ◽  
Shin Yaginuma ◽  
Tomonobu Nakayama ◽  
Masakazu Aono ◽  
...  
Keyword(s):  
Phase Transition ◽  
Metal Insulator ◽  
One Dimensional ◽  
Atomic Wires ◽  
Insulator Phase Transition

scholarly journals Effect of Sintering Temperature on Metal-Insulator Phase Transition in La1-xCaxMnO3 Perovskites

2020 ◽  
Vol 2 (1) ◽  
pp. 37-42
Author(s):  
Arunachalam M ◽  
Thamilmaran P ◽  
Sakthipandi K
Keyword(s):  
Phase Transition ◽  
Bulk Modulus ◽  
Sintering Temperature ◽  
Magnetic Sensors ◽  
Temperature Dependent ◽  
Metal Insulator ◽  
Wide Range ◽  
Different Temperatures ◽  
Insulator Phase Transition

Lanthanum calcium based perovskites are found to be advantageous for the possible applications in magnetic sensors/reading heads, cathodes in solid oxide fuel cells, and frequency switching devices. In the present investigation La0.3Ca0.7MnO3 perovskites were synthesised through solid state reaction and sintered at four different temperatures such as 900, 1000, 1100 and 1200˚ C. X-ray powder diffraction pattern confirms that the prepared La0.3Ca0.7MnO3 perovskites have orthorhombic structure with Pnma space group. Ultrasonic in-situ measurements have been carried out on the La0.3Ca0.7MnO3 perovskites over wide range of temperature and elastic constants such as bulk modulus of the prepared La0.3Ca0.7MnO3 perovskites was obtained as function of temperature. The temperature-dependent bulk modulus has shown an interesting anomaly at the metal-insulator phase transition. The metal insulator transition temperature derived from temperature-dependent bulk modulus increases from temperature 352˚ C to 367˚ C with the increase of sintering temperature from 900 to 1200˚ C.

Features of Optical Properties and the Electronic Structure of Nanostructured Oxides of 3d-Metals

2010 ◽  
Vol 168-169 ◽  
pp. 317-320 ◽  
Author(s):  
Boris A. Gizhevskii ◽  
Yu.P. Sukhorukov ◽  
L.V. Nomerovannaya ◽  
A.A. Makhnev ◽  
Yurii S. Ponosov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Absorption Edge ◽  
High Pressure Torsion ◽  
Fundamental Absorption Edge ◽  
Strongly Correlated ◽  
Phonon Modes ◽  
3D Metals ◽  
Wide Range ◽  
Strongly Correlated Oxides

Features of the optical properties of nanostructured strongly correlated oxides CuO, Y3Fe5O12, and FeBO3 in a wide range of energies, which includes both the fundamental absorption region, low-energy electron excitations, and phonon modes have been investigated by methods of optical spectroscopy. Absorption and reflection spectra, Raman spectra, and ellipsometry measurements are carried out on the samples of oxide nanostructured ceramics. High-density nanoceramics were prepared by shock-wave loading and high pressure torsion methods from coarse-grain oxide powders. Strong smearing of the fundamental absorption edge is revealed for all nanoceramics. Anomalous red shift of the absorption edge Eg is found in CuO nanooxide. The features of the optical functions in nanooxides of 3d-metals may be attributed to high defectiveness of nanooxides, peculiarities in the electronic structure of strongly correlated oxides and their tendency to electronic phase separation.

scholarly journals Research progress of metal-insulator phase transition in VO2 induced by electric field

2019 ◽  
Vol 68 (10) ◽  
pp. 107201
Author(s):  
Xiao-Ning Sun ◽  
Zhao-Ming Qu ◽  
Qing-Guo Wang ◽  
Yang Yuan ◽  
Shang-He Liu
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Research Progress ◽  
Metal Insulator ◽  
Insulator Phase Transition

scholarly journals Research progress of metal-insulator phase transition mechanism in VO2

2016 ◽  
Vol 65 (4) ◽  
pp. 047201
Author(s):  
Luo Ming-Hai ◽  
Xu Ma-Ji ◽  
Huang Qi-Wei ◽  
Li Pai ◽  
He Yun-Bin
Keyword(s):  
Phase Transition ◽  
Research Progress ◽  
Metal Insulator ◽  
Transition Mechanism ◽  
Insulator Phase Transition

Research progress on the preparation methods for VO2 nanoparticles and their application in smart windows

CrystEngComm ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 851-869 ◽  
Author(s):  
Wen Zeng ◽  
Nan Chen ◽  
Weiguang Xie
Keyword(s):  
Phase Transition ◽  
Vanadium Dioxide ◽  
Research Progress ◽  
Metal Insulator ◽  
Preparation Methods ◽  
Smart Windows ◽  
First Order ◽  
Photoelectric Properties ◽  
Insulator Phase Transition

Accompanied with drastic changes in photoelectric properties, vanadium dioxide (VO2) exhibits a first order metal–insulator phase transition (MIT) at the temperature of about 68 °C.

scholarly journals Фазовый переход металл-диэлектрик в тонких пленках диоксида ванадия, легированного никелем

2019 ◽  
Vol 61 (10) ◽  
pp. 1935
Author(s):  
В.Н. Андреев ◽  
В.А. Климов
Keyword(s):  
Phase Transition ◽  
Nickel Concentration ◽  
Integral Parameter ◽  
Hopping Conduction ◽  
Conduction Model ◽  
Metal Insulator ◽  
Wide Range ◽  
Atomic Vibrations ◽  
Insulator Phase Transition ◽  
Thin Polycrystalline

AbstractThe electrical conductivity of thin polycrystalline VNi_ x O_2 films has been studied in a wide range of temperatures, which covers the regions of both metallic and insulator phase. It is shown that the metal–insulator phase transition temperature decreases as the nickel concentration increases, and the temperature range of coexistence of the phases increases monotonically. The temperature dependence of the conductivity of the insulating VNi_ x O_2 phase is explained using the hopping conduction model that takes into account the influence of thermal atomic vibrations on the resonance integral. Parameter ε has been calculated as a function of the doping level of VO_2.

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