Spontaneous polarization by photon tunneling model in ferroelectrics

Abstract

We apply a photon correlation theory to ferroelectrics where we consider a photon field from its constituent electrons and ions. We calculate the spontaneous polarization $P_s$ which originates from certain alignments of photon field in correlation with the specific phonon mode. Using the microscopic Hamiltonian, we obtain the ferroelectric transition temperature, $T_c.$ The spontaneous polarization derived by our theory is proportional to $\sqrt{T_c-T}$ in some conformity with experimental data.

KEYWORDS:

• Ferroelectrics
• photon tunneling
• polarization

PACS NUMBERS:

• 77.84.Fa
• 77.80.-e
• 77.80.Bh

Additional information

Funding

This work has been conducted under a research grant of Kwangwoon University in 2017.