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I. A. Sergienko
Researcher at Oak Ridge National Laboratory
Publications - 22
Citations - 2196
I. A. Sergienko is an academic researcher from Oak Ridge National Laboratory. The author has contributed to research in topics: Landau theory & Phase transition. The author has an hindex of 13, co-authored 22 publications receiving 1999 citations. Previous affiliations of I. A. Sergienko include Memorial University of Newfoundland & University of Tennessee.
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Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
TL;DR: In this article, the Dzyaloshinskii-Moriya interaction (DMI) provides the microscopic mechanism for the coexistence and strong coupling between ferroelectricity and incommensurate magnetism.
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Ferroelectricity in the magnetic E-phase of orthorhombic perovskites.
TL;DR: It is predicted that the polarization induced by the E-type magnetic order can potentially be enhanced by up to 2 orders of magnitude with respect to that in the spiral magnetic phases of TbMnO3 and similar multiferroic compounds.
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Dual nature of improper ferroelectricity in a magnetoelectric multiferroic.
Silvia Picozzi,Kunihiko Yamauchi,Biplab Sanyal,I. A. Sergienko,I. A. Sergienko,Elbio Dagotto,Elbio Dagotto +6 more
TL;DR: It is found that the two proposed mechanisms for FE in multiferroics, lattice and electronic based, are simultaneously active in this compound: a large portion of the ferroelectric polarization arises due to quantum-mechanical effects of electron orbital polarization, in addition to the conventional polar atomic displacements.
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Order parameter in superconductors with nondegenerate bands
I. A. Sergienko,Stephanie Curnoe +1 more
TL;DR: In this article, general symmetry properties of the pairing function Delta(k) in noncentrosymmetric superconductors with spin-orbit coupling (NSC), including CePt3Si, UIr and Cd2Re2O7, were investigated.
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Metallic “Ferroelectricity” in the Pyrochlore C d 2 R e 2 O 7
I. A. Sergienko,V. Keppens,Michael A. McGuire,R. Jin,Jian He,Stephanie Curnoe,Brian C. Sales,Peter Blaha,David J. Singh,Karlheinz Schwarz,David Mandrus +10 more
TL;DR: Measurements of the elastic moduli of Cd2Re2O7 through the 200 K cubic-to-tetragonal phase transition are presented and it is revealed that the transition is consistent with the material being classified as a ferroelectric metal in the weaker sense described by Anderson and Blount (loss of a center of symmetry).