Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu2(Si1-xGex) 2O7 (x = 0.65)

H. Ohta; S. Okubo; D. Fukuoka; Y. Inagaki; T. Kunimoto; M. Kimata; K. Koyama; M. Motokawa; Z. Hiroi

doi:10.1016/j.jmmm.2003.12.547

Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu₂(Si_1-xGe_x) ₂O₇ (x = 0.65)

H. Ohta, S. Okubo, D. Fukuoka, Y. Inagaki, T. Kunimoto, M. Kimata, K. Koyama, M. Motokawa, Z. Hiroi

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

We have performed the high-field ESR of the one-dimensional BaCu ₂(Si_1-xGe_x)₂O₇ (x = 0.65) antiferromagnet at 0.5 and 1.8 K in the wider frequency and magnetic field region (40-500 GHz, up to 30 T), and found the breather excitation predicted by the Oshikawa-Affleck (OA) theory. The observed field-induced gap for B||c (chain direction) shows the B^2/3 dependence suggested by the OA theory, and the dependence is weak for the other directions which is consistent with the anisotropy of the Dzyaloshinsky-Moriya interaction. The results will be also discussed in connection with the breather excitation observed in Cu-benzoate.

Original language	English
Pages (from-to)	929-930
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.547
Publication status	Published - 2004 May
Externally published	Yes
Event	Proceedings of the International Conference on Magnetism - Rome, Italy Duration: 2003 Jul 27 → 2003 Aug 1

Keywords

Antiferromagnetism-quantum
Electron spin resonance
Low-dimensional systems
Magnetic field

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.12.547

Cite this

@article{307f54ec945f499e9461007d8338a065,

title = "Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu2(Si1-xGex) 2O7 (x = 0.65)",

abstract = "We have performed the high-field ESR of the one-dimensional BaCu 2(Si1-xGex)2O7 (x = 0.65) antiferromagnet at 0.5 and 1.8 K in the wider frequency and magnetic field region (40-500 GHz, up to 30 T), and found the breather excitation predicted by the Oshikawa-Affleck (OA) theory. The observed field-induced gap for B||c (chain direction) shows the B2/3 dependence suggested by the OA theory, and the dependence is weak for the other directions which is consistent with the anisotropy of the Dzyaloshinsky-Moriya interaction. The results will be also discussed in connection with the breather excitation observed in Cu-benzoate.",

keywords = "Antiferromagnetism-quantum, Electron spin resonance, Low-dimensional systems, Magnetic field",

author = "H. Ohta and S. Okubo and D. Fukuoka and Y. Inagaki and T. Kunimoto and M. Kimata and K. Koyama and M. Motokawa and Z. Hiroi",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (B) (No. 13130204) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. This work was partly performed at High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University.; Proceedings of the International Conference on Magnetism ; Conference date: 27-07-2003 Through 01-08-2003",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.12.547",

language = "English",

volume = "272-276",

pages = "929--930",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

}

TY - JOUR

T1 - Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu2(Si1-xGex) 2O7 (x = 0.65)

AU - Ohta, H.

AU - Okubo, S.

AU - Fukuoka, D.

AU - Inagaki, Y.

AU - Kunimoto, T.

AU - Kimata, M.

AU - Koyama, K.

AU - Motokawa, M.

AU - Hiroi, Z.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (B) (No. 13130204) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. This work was partly performed at High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University.

PY - 2004/5

Y1 - 2004/5

N2 - We have performed the high-field ESR of the one-dimensional BaCu 2(Si1-xGex)2O7 (x = 0.65) antiferromagnet at 0.5 and 1.8 K in the wider frequency and magnetic field region (40-500 GHz, up to 30 T), and found the breather excitation predicted by the Oshikawa-Affleck (OA) theory. The observed field-induced gap for B||c (chain direction) shows the B2/3 dependence suggested by the OA theory, and the dependence is weak for the other directions which is consistent with the anisotropy of the Dzyaloshinsky-Moriya interaction. The results will be also discussed in connection with the breather excitation observed in Cu-benzoate.

AB - We have performed the high-field ESR of the one-dimensional BaCu 2(Si1-xGex)2O7 (x = 0.65) antiferromagnet at 0.5 and 1.8 K in the wider frequency and magnetic field region (40-500 GHz, up to 30 T), and found the breather excitation predicted by the Oshikawa-Affleck (OA) theory. The observed field-induced gap for B||c (chain direction) shows the B2/3 dependence suggested by the OA theory, and the dependence is weak for the other directions which is consistent with the anisotropy of the Dzyaloshinsky-Moriya interaction. The results will be also discussed in connection with the breather excitation observed in Cu-benzoate.

KW - Antiferromagnetism-quantum

KW - Electron spin resonance

KW - Low-dimensional systems

KW - Magnetic field

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DO - 10.1016/j.jmmm.2003.12.547

M3 - Conference article

AN - SCOPUS:2642584234

SN - 0304-8853

VL - 272-276

SP - 929

EP - 930

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

T2 - Proceedings of the International Conference on Magnetism

Y2 - 27 July 2003 through 1 August 2003

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