arXiv Open Access 2023

Collective spin oscillations in a magnetized graphene sheet

M. Agarwal O. A. Starykh D. A. Pesin E. G. Mishchenko

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Abstrak

We investigate collective spin excitations of graphene electrons with short-ranged interactions and subject to the external Zeeman magnetic field. We find that in addition to the familiar Silin spin wave, a collective spin-flip excitation that reduces to the uniform precession when the wave's momentum approaches zero, the magnetized graphene supports another collective mode visible in the transverse spin susceptibility: a collective spin-current mode. Unlike the Silin wave, this mode is not dictated by the spin-rotational symmetry but rather owns its existence to the pseudo-spin structure of the graphene lattice. We find the new collective excitation to become sharply defined in a finite interval of wave's momenta, the range of which is determined by the interaction and the magnetization.

Topik & Kata Kunci

cond-mat.mes-hall cond-mat.other

Penulis (4)

M. Agarwal

O. A. Starykh

D. A. Pesin

E. G. Mishchenko

Format Sitasi

APA MLA BibTeX

Agarwal, M., Starykh, O.A., Pesin, D.A., Mishchenko, E.G. (2023). Collective spin oscillations in a magnetized graphene sheet. https://arxiv.org/abs/2312.16782

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2023
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓