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First-principles design and subsequent synthesis of a material to search for the permanent electric dipole moment of the electron

K. Z. Rushchanskii, S. Kamba, V. Goian, P. Vanvek, M. Savinov, J. Provlevska, D. Nuzhnyy, K. Knivsek, F. Laufek, S. Eckel, S. K. Lamoreaux, A. O. Sushkov, M. Lezaic, N. A. Spaldin
Arxiv ID: 1002.0376Last updated: 3/9/2021
We describe the first-principles design and subsequent synthesis of a new material with the specific functionalities required for a solid-state-based search for the permanent electric dipole moment of the electron. We show computationally that perovskite-structure europium barium titanate should exhibit the required large and pressure-dependent ferroelectric polarization, local magnetic moments, and absence of magnetic ordering even at liquid helium temperature. Subsequent synthesis and characterization of Eu$_{0.5}$Ba$_{0.5}$TiO$_3$ ceramics confirm the predicted desirable properties.

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