Third order dielectric susceptibility in a model quantum paraelectric

Details Third order dielectric susceptibility in a model quantum paraelectric Third order dielectric susceptibility in a model quantum paraelectric

1996-02-15

arxiv.org/abs/mtrl-th/9602002v1

Physics

Condensed Matter

Materials Science

22 pages

Scientific paper

10.1103/PhysRevB.54.15714

In the context of perovskite quantum paraelectrics, we study the effects of a quadrupolar interaction $J_q$, in addition to the standard dipolar one $J_d$. We concentrate here on the nonlinear dielectric response $\chi_{P}^{(3)}$, as the main response function sensitive to quadrupolar (in our case antiquadrupolar) interactions. We employ a 3D quantum four-state lattice model and mean-field theory. The results show that inclusion of quadrupolar coupling of moderate strength ($J_q \sim {{1}\over{4}} J_d$) is clearly accompanied by a double change of sign of $\chi_{P}^{(3)}$ from negative to positive, near the quantum temperature $T_Q$ where the quantum paraelectric behaviour sets in. We fit our $\chi_{P}^{(3)}$ to recent experimental data for SrTiO$_3$, where the sign change is identified close to $T_Q \sim 37 K$.

Affiliated with

Also associated with

No associations

Rating

Third order dielectric susceptibility in a model quantum paraelectric does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Third order dielectric susceptibility in a model quantum paraelectric, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Third order dielectric susceptibility in a model quantum paraelectric will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-323136