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7 papers · 2 filters
The importance of Charge Fluctuations for the Topological Phase in SmB
Chul-Hee Min, P. Lutz, S. Fiedler +5
The discovery of topologically non-trivial states in band insulators has induced an extensive search for topological phase in strongly correlated electron systems. In particular, s…
Magnon breakdown in a two dimensional triangular lattice Heisenberg antiferromagnet of multiferroic LuMnO
Joosung Oh, Manh Duc Le, Jaehong Jeong +7
The breakdown of magnons, the quasiparticles of magnetic systems, has rarely been seen. By using an inelastic neutron scattering technique we report the observation of spontaneous…
Lattice and orbital fluctuations in TiPO4
Dirk Wulferding, Angela Möller, Kwang-Yong Choi +7
In the s = 1/2 antiferromagnetic spin chain material TiPO4 the formation of a spin gap takes place in a two step process with two characteristic temperatures, T*=111 K and TSP=74 K…
Large in-plane deformation of RuO6 octahedron and ferromagnetism of bulk SrRuO3
Sanghyun Lee, J. R. Zhang, S. Torii +6
SrRuO3 is a ferromagnetic metal with several unusual physical properties such as zero thermal expansion below Tc, so-called Invar behavior. Another anomalous feature is that the a-…
Temperature Evolution of Itinerant Ferromagnetism in SrRuO3 Probed by Optical Spectroscopy
D. W. Jeong, Hong Chul Choi, Choong H. Kim +12
The temperature () dependence of the optical conductivity spectra of a single crystal SrRuO thin film is studied over a range from 5 to 450 K. We observed signifi…
Negative magnetostrictive magnetoelectric coupling of BiFeO3
Sanghyun Lee, M. T. Fernandez-Diaz, H. Kimura +8
How the magnetoelectric coupling actually occurs on a microscopic level in multiferroic BiFeO3 is not well known. By using the high-resolution single crystal neutron diffraction te…