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Journal Articles

Magnetization energy current in the axial magnetic effect

Shitade, Atsuo*; Araki, Yasufumi

Physical Review B, 103(15), p.155202_1 - 155202_8, 2021/04

 Times Cited Count:2 Percentile:18.63(Materials Science, Multidisciplinary)

The axial magnetic effect (AME) is one of the anomalous transport phenomena in which the energy current is induced by an axial magnetic field. Here we numerically study the AME for the relativistic Wilson fermion in the axial magnetic field and a twisted Dirac semimetal. The AME current density inside the bulk is nonzero, and particularly in the low energy regime for the former model, it is explained by the field-theoretical results without any fitting parameter. However, for both models, the average AME current density vanishes owing to the surface contribution. The axial gauge field is regarded as the spatially modulated (effective) Zeeman field and induces the spatially modulated energy magnetization. The AME is attributed to the magnetization energy current and hence cannot be observed in transport experiments.

Journal Articles

Orbital angular momentum in a topological superconductor with Chern number higher than 1

Shitade, Atsuo*; Nagai, Yuki

Physical Review B, 93(17), p.174517_1 - 174517_9, 2016/05

 Times Cited Count:3 Percentile:16.22(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Orbital angular momentum in a nonchiral topological superconductor

Shitade, Atsuo*; Nagai, Yuki

Physical Review B, 92(2), p.024502_1 - 024502_7, 2015/07

 Times Cited Count:10 Percentile:42.32(Materials Science, Multidisciplinary)

We investigate the bulk orbital angular momentum in a two-dimensional time-reversal broken topological superconductor with the Rashba spin-orbit interaction, the Zeeman interaction, and the $$s$$-wave pairing potential. Prior to the topological phase transition, we find the crossover from $$s$$-wave to $$p$$-wave. For the large spin-orbit interaction, even in the topological phase, $$L_z/N$$ does not reach -1/2, which is the universal value in chiral $$p$$-wave superconductors. Here $$L_z$$ and $$N$$ are the bulk orbital angular momentum and the total number of electrons at zero temperature, respectively. Finally, we discuss the effects of nonmagnetic impurities.

Oral presentation

Magnetization energy current in the axial magnetic effect

Shitade, Atsuo*; Araki, Yasufumi

no journal, , 

no abstracts in English

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