arXiv Open Access 2006

Flat spin wave dispersion in a triangular antiferromagnet

Oleg A. Starykh Andrey V. Chubukov Alexander G. Abanov

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Abstrak

The excitation spectrum of a S=1/2 2D triangular quantum antiferromagnet is studied using 1/S expansion. Due to the non-collinearity of the classical ground state significant and non-trivial corrections to the spin wave spectrum appear already in the first order in 1/S in contrast to the square lattice antiferromagnet. The resulting magnon dispersion is almost flat in a substantial portion of the Brillouin zone. Our results are in quantitative agreement with recent series expansion studies by Zheng, Fjaerestad, Singh, McKenzie, and Coldea [PRL 96, 057201 (2006) and cond-mat/0608008].

Topik & Kata Kunci

cond-mat.str-el cond-mat.stat-mech

Penulis (3)

Oleg A. Starykh

Andrey V. Chubukov

Alexander G. Abanov

Format Sitasi

APA MLA BibTeX

Starykh, O.A., Chubukov, A.V., Abanov, A.G. (2006). Flat spin wave dispersion in a triangular antiferromagnet. https://arxiv.org/abs/cond-mat/0608002

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2006
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓