Designed and built apparatus
- Pressure cell: In order to apply pressure on the samples up to 2 GPas (~ 20 kbar).
Hydrostatic pressure influence the distance of the atoms in a solid compound and consequently affect the physical properties of the compound; it may even cause a phases transition or reveal new phenomenon. Therefore, the physical properties of the compound can be understood by the invaluable tool.
Many materials can show superconductivity features by pressure application; see for example Refs. [1-6]. This may be compared with the effects of doping impurities (internal pressure); the efforts have been made to simulate the effect of chemical pressure on superconducting transition temperature, Tc, through applied pressure. Variations of Tc under pressure has attracted great attention to advance our understanding of the paring in new superconductors .
A 2GPa Pressure cell is designated and developed for studying the electronic properties of various compounds under pressure, in a temperature range of 300 K to 30 K. It is exploited especially for electrical resistivity experiments.
 Pascal Reiss et al., Quenched nematic criticality and two superconducting domes in an iron-based superconductor, Nature Physics 16 (2020) 89. https://doi.org/10.5287/bodleian:2REyEPKZX.
 P. Ball, Cosmic superconductiviy, Nature material 19 (2020) 490. https://doi.org/10.1038/s41563-020-0671-2
 A. Legros et al., Universal T-linear resistivity and Planckian dissipation in overdoped cuprates, Nature Physics 15 (2019) 142. https://doi.org/10.1038/s41567-018-0334-2
 S. Arumugam1, et al., Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14), ScientificReports 7 (2017) 11731. https://doi:10.1038/s41598-017-11927-1
 F.F. Tafti, et al., Sudden reversal in the pressure dependence of Tc in the iron-based superconductor KFe2As2, Nature Physics 9 (2013) 349. https://doi.org/10.1038/nphys2617
 N.D. Mathur, et al., Magnetically mediated superconductivity in heavy fermion compounds, Nature 394 (1998) 39-43. https://doi.org/10.1038/27838.
 Eremets gorup: Nature 569 (2019) 528, Superconductivity at 250 K in lanthanum hydride under high pressures, https://doi.org/10.1038/s41586-019-1201-8; ….
A sealed container, providing a specific (neutral) atmosphere such as Argon or Nitorgen gases, arranges a desired working atmosphere for sensitive materials.
- Machine Press
These works have been fulfilled with Mr. Kambiz Shogi collaboration, Metallurgy engineer.