scholarly journals High-pressure study of transport properties in Co0.33NbS2

2011 ◽  
Vol 84 (7) ◽  
Author(s):  
N. Barišić ◽  
I. Smiljanić ◽  
P. Popčević ◽  
A. Bilušić ◽  
E. Tutiš ◽  
...  
Keyword(s):  
High Pressure ◽  
Transport Properties ◽  
High Pressure Study

High Pressure Studies of Quantum Well Emission and Deep Emission in GaInP(ordered)-GaAs Heterostructures

1997 ◽  
Vol 499 ◽  
Author(s):  
S. H. Kwok ◽  
P. Y. Yu ◽  
K. Uchida ◽  
T. Arai
Keyword(s):  
High Pressure ◽  
Quantum Well ◽  
Emission Band ◽  
Excitation Power ◽  
High Excitation ◽  
High Pressure Studies ◽  
Band Alignments ◽  
High Pressure Study

ABSTRACTWe report on a high pressure study of emission from a series of GaInP(ordered)/GaAs heterostructures. A so-called “deep emission” band at 1.46 eV is observed in all our samples. At high excitation power, quantum well emission emerges in only one structure where thin GaP layers are inserted on both sides of the GaAs well. From the pressure dependent emission in this sample we have determined its band alignments. The role of the GaP layers in suppressing the deep emission is elucidated.

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.

High-pressure transport properties of cadmium and zinc Arsenides

2014 ◽  
Vol 50 (9) ◽  
pp. 861-867
Author(s):  
A. Yu. Mollaev ◽  
L. A. Saipulaeva ◽  
R. K. Arslanov ◽  
A. N. Babushkin
Keyword(s):  
High Pressure ◽  
Transport Properties ◽  
Pressure Transport

High-Pressure Study of Metallocenes, M(η5-C5H5)2(M = Fe, Co)

2007 ◽  
Vol 76 (Suppl.A) ◽  
pp. 31-32
Author(s):  
Sergey V. Ovsyannikov ◽  
Vladimir V. Shchennikov ◽  
Alexander N. Titov ◽  
Yoshiya Uwatoko
Keyword(s):  
High Pressure ◽  
High Pressure Study

In-situ high-pressure study of the ordered phase of ethyl propionate

2007 ◽  
Vol 63 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Roman Gajda ◽  
Andrzej Katrusiak
Keyword(s):  
High Pressure ◽  
Degrees Of Freedom ◽  
Molecular Volume ◽  
Ethyl Propionate ◽  
Intermolecular Contacts ◽  
High Pressure Study ◽  
Pressure Phase ◽  
Three Degrees Of Freedom ◽  
Volume Difference

Ethyl propionate, C5H10O2 (m.p. 199 K), has been in-situ pressure-frozen and its structure determined at 1.34, 1.98 and 2.45 GPa. The crystal structure of the new high-pressure phase (denoted β) is different from phase α obtained by lowering the temperature. The freezing pressure of ethyl propionate at 296 K is 1.03 GPa. The molecule assumes an extended chain s-trans–trans–trans conformation, only slightly distorted from planarity. The closest intermolecular contacts in both phases are formed between carbonyl O and methyl H atoms; however, the ethyl-group H atoms in phase β form no contacts shorter than 2.58 Å. A considerable molecular volume difference of 24.2 Å3 between phases α and β can be rationalized in terms of degrees of freedom of molecules arranged into closely packed structures: the three degrees of freedom allowed for rearrangements of molecules confined to planar sheets in phase α, but are not sufficient for obtaining a densely packed pattern.

High-Pressure Study of the Anomalous Rare-Earth TernariesEu1.2Mo6S8andEu1.2Mo6Se8

1981 ◽  
Vol 46 (4) ◽  
pp. 276-279 ◽  
Author(s):  
C. W. Chu ◽  
S. Z. Huang ◽  
C. H. Lin ◽  
R. L. Meng ◽  
M. K. Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Rare Earth ◽  
High Pressure Study

Preparation and transport properties of AgSbTe2 by high-pressure and high-temperature

2008 ◽  
Vol 454 (1-2) ◽  
pp. 415-418 ◽  
Author(s):  
Hongan Ma ◽  
Taichao Su ◽  
Pinwen Zhu ◽  
Jiangang Guo ◽  
Xiaopeng Jia
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Transport Properties

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

High-pressure study of the thermoelectric properties of various oxides (ZnO, Ti2 O3 , Fe x O y ) and FeAs-based compounds

2013 ◽  
Vol 250 (4) ◽  
pp. 741-745 ◽  
Author(s):  
Natalia V. Morozova ◽  
Iuliia A. Khmeleva ◽  
Sergey V. Ovsyannikov ◽  
Alexander E. Karkin ◽  
Vladimir V. Shchennikov
Keyword(s):  
High Pressure ◽  
Thermoelectric Properties ◽  
High Pressure Study
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