23,215 research outputs found
Thermodynamic Geometry of the Born-Infeld-anti-de Sitter black holes
Thermodynamic geometry is applied to the Born-Infeld-anti-de Sitter black
hole (BIAdS) in the four dimensions, which is a nonlinear generalization of the
Reissner-Norstr\"Aom-AdS black hole (RNAdS). We compute the Weinhold as well as
the Ruppeiner scalar curvature and find that the singular points are not the
same with the ones obtained using the heat capacity. Legendre-invariant metric
proposed by Quevedo and the metric obtained by using the free energy as the
thermodynamic potential are obtained and the corresponding scalar curvatures
diverge at the Davies points.Comment: Latex,19 pages,14 figure
Inherent properties of binary tetrahedral semiconductors
A new approach utilising the concept of ionic charge theory has been used to
explain the inherent properties such as lattice thermal conductivity and bulk
modulus of 3,5 and 2,6 semiconductors. The lattice thermal conductivity of
these semiconductors exhibit a linear relationship when plotted on a log scale
against the nearest neighbour distance but fall on two straight lines according
to the product of the ionic charge of the compounds. On the basis of this
result a simple relationship of lattice thermal conductivity with bulk modulus
is proposed and used to estimate the bulk modulus of these semiconductors. A
fairly good agreement has been found between the experimantal and calculated
values of these parameters for zinc blende structured solids.Comment: 6 pages, 19 reference
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