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Emergent Magneto-multipoles and Nonlinear Responses of a Magnetic Hopfion
Yizhou Liu, Hikaru Watanabe, Naoto Nagaosa
The three-dimensional emergent magnetic field of a magnetic hopfion gives rise to emergent magneto-multipoles in a similar manner to the multipoles of classical elec…
The supercurrent diode effect and nonreciprocal paraconductivity due to the chiral structure of nanotubes
James Jun He, Yukio Tanaka, Naoto Nagaosa
The research interest in the supercurrent diode effect (SDE) has been growing. It has been found in various kinds of systems, in a large part of which it may be understood by combi…
Polaron with Quadratic Electron-phonon Interaction
Stefano Ragni, Thomas Hahn, Zhongjin Zhang +9
We present the first numerically exact study of a polaron with quadratic coupling to the oscillator displacement, using two alternative methodological developments. Our results cov…
Tunable Josephson diode effect on the surface of topological insulators
Bo Lu, Satoshi Ikegaya, Pablo Burset +2
The Josephson rectification effect, where the resistance is finite in one direction while zero in the other, has been recently realized experimentally. The resulting Josephson diod…
Toroidal Scattering and Nonreciprocal Transport by Magnetic Impurities
Hiroki Isobe, Naoto Nagaosa
We propose the second-order response of metals in an electric field induced by magnetic impurities which locally break inversion symmetry. The impurities with toroidal moments scat…
Quantum Transport and Magnetism of Dirac Electrons in Solids
Hiroki Isobe, Naoto Nagaosa
The relativistic Dirac equation covers the fundamentals of electronic phenomena in solids and as such it effectively describes the electronic states of the topological insulators l…