Some elements go cubic under pressure
نویسندگان
چکیده
منابع مشابه
Stability of a new cubic monoxide of Thorium under pressure
Density functional theory has been applied to elucidate the stability of thorium monoxide (ThO). It is found out that the pressure can stabilize the rocksalt phase of ThO, and the transition pressure is estimated between 14 and 22 GPa. The stability of ThO can be attributed due to the gradually filling 5f orbitals at the expense of 7s and 6d electrons in Th metal. For ThO, the pressure induces ...
متن کاملSuperconductivity in Hydrides Doped with Main Group Elements Under Pressure
A priori crystal structure prediction techniques have been used to explore the phase diagrams of hydrides ofmain group elements under pressure. Anumber of novel phases with the chemical formulas MHn, n > 1 and M = Li, Na, K, Rb, Cs; MHn, n > 2 and M= Mg, Ca, Sr, Ba; HnI with n > 1 and PH, PH2, PH3 have been predicted to be stable at pressures achievable in diamond anvil cells. The hydrogenic la...
متن کاملAnalyzing Some Behavior of a Cracked Beam under Pressure
In this paper, a simple cracked beam under vertical pressure is considered. Stress intensity factor, normal, and shear stresses (at the tip of the crack) are calculated with finite element software. Results are compared when there is contact between crack surfaces with different direction of pressure, and when there is no contact. Results show that stress intensity factors can be implemented fo...
متن کاملAnalysis of compression and elasticity of the nanocrystalline cubic silicon nitride (γ- Si3N4) under high pressure
Analysis of compression and elasticity of the nanocrystalline cubic silicon nitride (γSi3N4) under high pressure Monika Goyal & B.R.K.Gupta Department of Physics, IAH GLA University, Mathura-281406, (U.P.), India __________________________________________________________________________________________ Abstract: A simple theory based on Tait’s equation of state is applied to predict the effect ...
متن کاملPolar effects on the thermal conductivity of cubic boron nitride under pressure.
We report the lattice thermal conductivity (κ) of cubic boron nitride (c-BN) under pressure calculated using density functional theory. Pressure was used to manipulate the c-BN phonon dispersion and study its effect on thermal conductivity. These results were compared to c-BN's mass-equivalent, nonpolar counterpart, diamond, in order to isolate the effect of polar bonds on thermal conductivity....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Today
سال: 2007
ISSN: 0031-9228,1945-0699
DOI: 10.1063/1.2800085