Modeling Pressure Effects on the Electronic Properties of Ca, Sr, and Ba by the Confined Atoms Model

2009 ◽  
pp. 1-12 ◽  
Author(s):  
Doris Guerra ◽  
Rubicelia Vargas ◽  
Patricio Fuentealba ◽  
Jorge Garza
Keyword(s):  
Electronic Properties ◽  
Pressure Effects

scholarly journals Distinct superconducting properties and hydrostatic pressure effects in 2D α- and β-Mo2C crystal sheets

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yunjie Fan ◽  
Chuan Xu ◽  
Xiang Liu ◽  
Chao Ma ◽  
Yuewei Yin ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Hydrostatic Pressure ◽  
Electronic Properties ◽  
Superconducting Transition Temperature ◽  
Important Influence ◽  
Pressure Effects ◽  
Superconducting Transition ◽  
Superconducting Properties ◽  
Disordered Carbon

Abstract Recently, 2D Mo2C, a new member of the MXene family, has attracted much attention due to the exotic superconducting properties discovered in 2D α-Mo2C. Here, not only 2D α-Mo2C but also 2D β-Mo2C crystal sheets with distinct disordered carbon distributions were successfully grown. 2D β-Mo2C shows a much stronger superconductivity than 2D α-Mo2C, and their superconductivities have different hydrostatic pressure responses. The superconducting transition temperature Tc of 2D α-Mo2C shows a dome-shaped profile under pressure, implying the existence of two competing effects arising from phononic and electronic properties, while for 2D β-Mo2C, Tc decreases monotonically with increasing pressure, possibly due to phonon stiffening. These results indicate that the electronic properties have a more important influence on the superconductivity in 2D α-Mo2C compared to 2D β-Mo2C. The ordered and disordered carbon distributions in 2D α-Mo2C and β-Mo2C, respectively, may be the underlying origin for their different electronic and superconducting properties.

scholarly journals Pressure effects on the electronic properties of the undoped superconductor ThFeAsN

2018 ◽  
Vol 97 (14) ◽  
Author(s):  
N. Barbero ◽  
S. Holenstein ◽  
T. Shang ◽  
Z. Shermadini ◽  
F. Lochner ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Pressure Effects
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