International Journal of Physics and Applications

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Point Asymmetry in Charge Shift Model for Electric Field Gradient in TCP Metals


Affiliations
1 Department of Physics, College Of Commerce, Patna., India
     

   Subscribe/Renew Journal


Electric field gradient at nuclear site in the lattice of tetragonal close packed (TCP) metals such as Indium is computed using the theory developed on the pattern of the Charge Shift Model initiated for hexagonal close packed (hcp) lattice. Numerical results are obtained using FORTRAN programs developed by us for electric field gradient in Indium. A tabulation of lattice sums for electric gradient in this metal suggests that all the three nonequivalent sites under the charge shift ansatz do not simultaneously pass through null electric field gradient for the case when the tcp lattice of the element transforms to body centered cubic lattice with axial ratio unity. At least one non-equivalent electronic site in the frame work of the charge shift model lacks the point symmetry of tetragonal system and contributes an extra electric field gradient.

Keywords

Lattice Sum, TCP Lattice, Electric Field Gradient, Indium, Charge Shift, Body Centered Cubic Lattice
Subscription Login to verify subscription
User
Notifications
Font Size


  • T.P. Das, Physica Scripta 11 12 (1975)

  • Mahapatra N.C, Patnaik P.C., Thomson M.D, Das T.P. Phys. Rev. B16 30001(1977)

  • E. Bodenstedt and B Parscheid, Hyp. Int. 5 291 (1978)

  • H.C. Verma and G.N. Rao, Phys. Lett. A82 303(1981)

  • S. Chandra and H.C. Verma, Phys. St. Sol. B K73 131 (1985)

  • S.N. Gupta, G. Verma and H.C Verma, Pramana 23 39 (1984)

  • S. Chandra and H.C.Verma, Phys. Rev. B34 9(1986)

  • S. Chandra and H.C.Verma, Phys. St. Sol.(b) 145(1988)K1

  • S.N. Gupta, A. Anand, S. Chandra and B.C. Rai, J.Phy.Sc. vol 12 no. 1159 (2010)

  • H.C. Verma, B.kumar, B.C. Rai and S. Chandra, Hyp. Int. 52 97 (1989)

  • F.W.de Wette, Phys. Rev. 123, 1 (1961)

  • D.P.Verma, A.Yadav and H.C.Verma, Pramana 21 357(1983)

  • D.P. Verma, B. Kumar and H.C. Verma, Pramana 25 211 (1985)

  • T.P.Das and R.Bersohn, Phys. Rev. 102 733 (1965)

  • R.M.Sternheimer, Phys. Rev. 130 (1963)1423, Phys. Rev. 159, 2(1967)


Abstract Views: 419

PDF Views: 0




  • Point Asymmetry in Charge Shift Model for Electric Field Gradient in TCP Metals

Abstract Views: 419  |  PDF Views: 0

Authors

B. C. Rai
Department of Physics, College Of Commerce, Patna., India
A. Kumar
Department of Physics, College Of Commerce, Patna., India

Abstract


Electric field gradient at nuclear site in the lattice of tetragonal close packed (TCP) metals such as Indium is computed using the theory developed on the pattern of the Charge Shift Model initiated for hexagonal close packed (hcp) lattice. Numerical results are obtained using FORTRAN programs developed by us for electric field gradient in Indium. A tabulation of lattice sums for electric gradient in this metal suggests that all the three nonequivalent sites under the charge shift ansatz do not simultaneously pass through null electric field gradient for the case when the tcp lattice of the element transforms to body centered cubic lattice with axial ratio unity. At least one non-equivalent electronic site in the frame work of the charge shift model lacks the point symmetry of tetragonal system and contributes an extra electric field gradient.

Keywords


Lattice Sum, TCP Lattice, Electric Field Gradient, Indium, Charge Shift, Body Centered Cubic Lattice

References