Static and Vibrational Properties of Equiatomic Cesium-Alkali Binary Alloys

Authors Aditya M. Vora

Humanities and Social Science Department, S. T. B. S. College of Diploma Engineering, Shri Swami Atmanand Sarswati Vidya Sankul, Opp. Kapodra Police Station,Varachha Road, Surat 395 006, Gujarat, India

Issue Volume 4, Year 2012, Number 2
Dates Received 01 March 2012; published online 04 July 2012
Citation Aditya M. Vora, J. Nano-Electron. Phys. 4 No 2, 25 (2012)
PACS Number(s) 2.30. + d; 62.20. – x; 62.20.Dc; 63.50. + x
Keywords Static and vibrational properties, Cs-based equiatomic alloys, Phonon dispersion curves (PDC).
Annotation The computations of the static and vibrational properties of four equiatomic Cs-based binary alloys viz. Cs0.5Li0.5, Cs0.5Na0.5, Cs0.5K0.5 and Cs0.5Rb0.5 to second order in local model potential is discussed in terms of real-space sum of Born von Karman central force constants. The local field correlation functions due to Hartree (H), Ichimaru-Utsumi (IU) and Sarkar et al. (S) are used to investigate influence of the screening effects on the aforesaid properties. Results for the lattice constants, i.e. С11, С12, С44, С12 – С44, С12 / С44, and bulk modulus B obtained using the H-local field correction function, have higher values in comparison with the results obtained for the same properties using IU and S local field correction functions. The results for the Shear modulus (C), deviation from Cauchy’s relation, Poisson’s ratio , Young modulus Y, propagation velocity of elastic waves, phonon dispersion curves and degree of anisotropy A are highly appreciable for the four equiatomic Cs-based binary alloys.

List of References