フルヤ　シュンスケ   FURUYA Shunsuke   古谷　峻介    所属   埼玉医科大学  医学部 教養教育    職種   専任講師
論文種別	学術雑誌(原著)
言語種別	英語
査読の有無	査読あり
表題	Boundary Resonances in S=1/2 Antiferromagnetic Chains Under a Staggered Field
掲載誌名	正式名：PHYSICAL REVIEW LETTERS ISSNコード：0031-9007/1079-7114
出版社	AMER PHYSICAL SOC
巻・号・頁	109(24)
著者・共著者	Shunsuke C. Furuya,Masaki Oshikawa
発行年月	2012/12
概要	We develop a boundary field theory approach to electron spin resonance in open S=1/2 Heisenberg antiferromagnetic chains with an effective staggered field. In terms of the sine Gordon effective field theory with boundaries, we point out the existence of boundary bound states of elementary excitations, and modification of the selection rules at the boundary. We argue that several "unknown modes'' found in electron spin resonance experiments on KCuGaF6 [I. Umegaki, H. Tanaka, T. Ono, H. Uekusa, and H. Nojiri, Phys. Rev. B 79, 184401 (2009)] and Cu-PM [S. A. Zvyagin, A. K. Kolezhuk, J. Krzystek, and R. Feyerherm, Phys. Rev. Lett. 93, 027201 (2004)] can be understood as boundary resonances introduced by these effects.
DOI	10.1103/PhysRevLett.109.247603
arXiv ID	arXiv:1112.1088
PermalinkURL	http://arxiv.org/abs/1112.1088v2