<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">Electronic specific heat and spin-susceptibility of heavy fermion systems: Role of <i>s</i>-<i>f</i> interactions</span>

Abstract

<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">Representing the heavy fermion systems by the periodic Anderson model, we use variational method to study the behaviour of electronic specific heat <i>C_v(T) </i>and magnetic susceptibility <i><img src='/image/spc_char/lembda.gif' border=0>_s(T)</i> of these systems. We have studied the effect of intra-site <i>s-f</i> interactions on the properties. We find that as <i>s-f</i> interactions increase, the low temperature peak in <i>C_v</i> lowers in magnitude whereas the peak in <img src='/image/spc_char/lembda.gif' border=0><i>_s </i>lowers, broadens and shifts a bit towards high temperature region.</span>