Structural Phase Transition and Electrical Transport Properties of CuInS2 Nanocrystals under High Pressure

2015 ◽  
Vol 119 (6) ◽  
pp. 2963-2968 ◽  
Author(s):  
Yan Li ◽  
Ying Wang ◽  
Ruilian Tang ◽  
Xin Wang ◽  
Pinwen Zhu ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Transport Properties ◽  
Structural Phase Transition ◽  
Electrical Transport ◽  
Structural Phase ◽  
Electrical Transport Properties ◽  
Cuins2 Nanocrystals

scholarly journals Pressure-Induced Structural Phase Transition and Metallization in Ga2Se3 up to 40.2 GPa under Non-Hydrostatic and Hydrostatic Environments

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 746
Author(s):  
Meiling Hong ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Xinyu Zhang
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transformation ◽  
Transport Properties ◽  
Electrical Transport ◽  
Structural Phase ◽  
Structure Evolution ◽  
Systematic Research ◽  
Electrical Transport Properties

A series of investigations on the structural, vibrational, and electrical transport characterizations for Ga2Se3 were conducted up to 40.2 GPa under different hydrostatic environments by virtue of Raman scattering, electrical conductivity, high-resolution transmission electron microscopy, and atomic force microscopy. Upon compression, Ga2Se3 underwent a phase transformation from the zinc-blende to NaCl-type structure at 10.6 GPa under non-hydrostatic conditions, which was manifested by the disappearance of an A mode and the noticeable discontinuities in the pressure-dependent Raman full width at half maximum (FWHMs) and electrical conductivity. Further increasing the pressure to 18.8 GPa, the semiconductor-to-metal phase transition occurred in Ga2Se3, which was evidenced by the high-pressure variable-temperature electrical conductivity measurements. However, the higher structural transition pressure point of 13.2 GPa was detected for Ga2Se3 under hydrostatic conditions, which was possibly related to the protective influence of the pressure medium. Upon decompression, the phase transformation and metallization were found to be reversible but existed in the large pressure hysteresis effect under different hydrostatic environments. Systematic research on the high-pressure structural and electrical transport properties for Ga2Se3 would be helpful to further explore the crystal structure evolution and electrical transport properties for other A2B3-type compounds.

scholarly journals Structural Phase Transition and Metallization of Nanocrystalline Rutile Investigated by High-Pressure Raman Spectroscopy and Electrical Conductivity

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 441 ◽  
Author(s):  
Meiling Hong ◽  
Lidong Dai ◽  
Heping Li ◽  
Haiying Hu ◽  
Kaixiang Liu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
Structural Phase Transition ◽  
Electrical Transport ◽  
Structural Phase ◽  
Pressure Coefficient ◽  
Complex Impedance ◽  
Atmospheric Condition

We investigate the structural, vibrational, and electrical transport properties of nanocrystalline rutile and its high-pressure polymorphs by Raman spectroscopy, and AC complex impedance spectroscopy in conjunction with the high-resolution transmission electron microscopy (HRTEM) up to ~25.0 GPa using the diamond anvil cell (DAC). Experimental results indicate that the structural phase transition and metallization for nanocrystalline rutile occurred with increasing pressure up to ~12.3 and ~14.5 GPa, respectively. The structural phase transition of sample at ~12.3 GPa is confirmed as a baddeleyite phase, which is verified by six new Raman characteristic peaks. The metallization of the baddeleyite phase is manifested by the temperature-dependent electrical conductivity measurements at ~14.5 GPa. However, upon decompression, the structural phase transition from the metallic baddeleyite to columbite phases at ~7.2 GPa is characterized by the inflexion point of the pressure coefficient and the pressure-dependent electrical conductivity. The recovered columbite phase is always retained to the atmospheric condition, which belongs to an irreversible phase transformation.

High-pressure structural phase transition and metallization in Ga2S3 under non-hydrostatic and hydrostatic conditions up to 36.4 GPa

2021 ◽  
Author(s):  
Linfei Yang ◽  
Jianjun Jiang ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Meiling Hong ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
Structural Properties ◽  
Structural Phase Transition ◽  
First Principles ◽  
Theoretical Calculations ◽  
Structural Phase

The vibrational, electrical and structural properties of Ga2S3 were explored by Raman spectroscopy, EC measurements, HRTEM and First-principles theoretical calculations under different pressure environments up to 36.4 GPa.

The structural phase transition of ammonia borane under high pressure

2020 ◽  
Vol 45 (58) ◽  
pp. 33047-33058
Author(s):  
Lan-Ting Shi ◽  
Cui-E Hu ◽  
Alfonso Muñoz ◽  
Lin-Xiang Ji ◽  
Yao-Yao Huang ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Ammonia Borane

Grain boundary effect on the β-boron electrical transport properties at high pressure

2010 ◽  
Vol 97 (17) ◽  
pp. 174101 ◽  
Author(s):  
Ming Li ◽  
Jie Yang ◽  
Karim Snoussi ◽  
Lixin Li ◽  
Huixin Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
Transport Properties ◽  
Electrical Transport ◽  
Boundary Effect ◽  
Electrical Transport Properties ◽  
Grain Boundary Effect

scholarly journals High-pressure structural phase transition inMnWO4

2015 ◽  
Vol 91 (10) ◽  
Author(s):  
J. Ruiz-Fuertes ◽  
A. Friedrich ◽  
O. Gomis ◽  
D. Errandonea ◽  
W. Morgenroth ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Structural Phase Transition ◽  
Structural Phase
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