title: Ferroelectricity driven by the noncentrosymmetric magnetic ordering in multiferroic TbMn(2)O(5): a first-principles study.
abstract: The ground state structural, electronic, and magnetic properties of multiferroic TbMn(2)O(5) are investigated via first-principles calculations. We show that the ferroelectricity in TbMn(2)O(5) is driven by the noncentrosymmetric magnetic ordering, without invoking the spin-orbit coupling and noncollinear spins. The intrinsic electric polarization in this compound is calculated to be 1187 nC cm(-2), an order of magnitude larger than previously thought.
authors.affiliation: Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
authors.forename: Chenjie
authors.initials: C
authors.lastname: Wang
authors.forename: Guang-Can
authors.initials: GC
authors.lastname: Guo
authors.forename: Lixin
authors.initials: L
authors.lastname: He