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Topological Nature of Anomalous Hall Effect in Ferromagnet
Masaru Onoda, Naoto Nagaosa
The anomalous Hall effect in two-dimensional ferromagnets is discussed to be the physical realization of the parity anomaly in (2+1)D, and the band crossing points behave as the to…
Role of electron-phonon interaction in the strongly correlated cuprates superconductors
Z. -X. Shen, A. Lanzara, S. Ishihara +1
Using high resolution angle-resolved photoemission data in conjunction with that from neutron and other probes, we show that electron-phonon (el-ph) coupling is strong in cuprates…
Orbital ferromagnetism and anomalous Hall effect in antiferromagnets on distorted fcc lattice
Ryuichi Shindou, Naoto Nagaosa
The Berry phase due to the spin wavefunction gives rise to the orbital ferromagnetism and anomalous Hall effect in the non-coplanar antiferromagnetic ordered state on face centered…
Quantum Tunneling in Half-Integer Spin Systems
S. Miyashita, N. Nagaosa
Motivated by the experimental observations of resonant tunnelings in the systems with half-integer spin, such as V and Mn, we study the mechanism of adiabatic change of…
Theory of Ferromagnetism in Ca1-xLaxB6
Shuichi Murakami, Ryuichi Shindou, Naoto Nagaosa +1
Novel ferromagnetism in CaLaB is studied in terms of the Ginzburg-Landau theory for excitonic order parameters, taking into account symmetry of the wavefunctions.…
Magnetic frustrations in the face centered cubic antiferromagnet NiS2
M. Matsuura, Y. Endoh, H. Hiraka +5
Neutron scattering experiment on NiS2 single crystal revealed a honeycomb pattern of the intensity distribution in reciprocal lattice space (continuous-line structure along the fcc…