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Spin current and magneto-electric effect in non-collinear magnets
Hosho Katsura, Naoto Nagaosa, Alexander V. Balatsky
A new microscopic mechanism of the magneto-electric (ME) effect based on the spin supercurrent is theoretically presented for non-collinear magnets. The close analogy between the s…
Anisotropic Electron-Phonon Coupling Uncovered By Angle-Resolved Photoemission
T. P. Devereaux, T. Cuk, Z. -X. Shen +1
Recently there has been an accumulation of experimental evidence in the high temperature superconductors suggesting the relevance of electron-phonon coupling in these materials. Th…
Entropy-Driven Reentrant Behavior in CMR Manganites
Nobuo Furukawa, Yukitoshi Motome, Naoto Nagaosa
We discuss the origin of the reentrant behaviors of insulating states above the Curie temperature of the colossal magnetoresistance manganites. We consider a system where charge or…
An Origin of CMR: Competing Phases and Disorder-Induced Insulator-to-Metal Transition in Manganites
Yukitoshi Motome, Nobuo Furukawa, Naoto Nagaosa
We theoretically explore the mechanism of the colossal magnetoresistance in manganese oxides by explicitly taking into account the phase competition between the double-exchange fer…
Re-entrant Behavior and Gigantic Response in Disordered Spin-Peierls System
Hitoshi Seo, Yukitoshi Motome, Naoto Nagaosa
Effects of disorder and external field on the competing spin-Peierls and antiferromagnetic states are studied theoretically in terms of the numerical transfer matrix method applied…
On the stability of U(1) spin liquids in two dimensions
Michael Hermele, T. Senthil, Matthew P. A. Fisher +3
We establish that spin liquids described in terms of gapless fermionic (Dirac) spinons and gapless U(1) gauge fluctuations can be stable in two dimensions, at least when the physic…