@article{67422719d0784f6cb7d8c482a854619a,
title = "Optical selection rules of the magnetic excitation in the S= 12 one-dimensional Ising-like antiferromagnet BaCo2 V2 O8",
abstract = "In this study, we clarify the selection rules of optical transitions from the ground state to the magnetic excited states in the quasi-one-dimensional quantum Ising-like antiferromagnet BaCo2V2O8 with spin S=12 using the high-field electron spin resonance measurement with illuminating polarized electromagnetic waves. We demonstrate that the unconventional magnetic excitation via the pair creation of quasipaticles at wave numbers qz = π/2 and π in the field-induced quantum critical state can couple with both oscillating magnetic and electric fields. Our density matrix renormalization group calculations indicate that the observed selection rules can be explained by two- and four-fold periodical spin interactions, originating from the screw chain structure in BaCo2V2O8, in addition to the magnetoelectric coupling between spins and electric dipoles. ",
author = "Shojiro Kimura and Hiroaki Onishi and Akira Okutani and Mitsuru Akaki and Yasuo Narumi and Masayuki Hagiwara and Kouichi Okunishi and Koichi Kindo and Zhangzhen He and Tomoyasu Taniyama and Mitsuru Itoh",
note = "Funding Information: The authors thank M. Kohno, M. Matsumoto, and H. Matsueda for their valuable discussions. The experimental work was performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 19H0406) and at the Center for Advanced High Magnetic Field Science in Osaka University under the Visiting Researcher{\~O}s Program of the Institute for Solid State Physics, The University of Tokyo. The computations were performed using supercomputers at the Japan Atomic Energy Agency and at the Institute for Solid State Physics, The University of Tokyo. This work was, in part, supported by the Grant-in-Aid for Scientific Research (Grants No. 19H01834, No. 19K03678, No. 19K03745, No. 21H01026, and No. 21H05191) from MEXT Japan. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",
year = "2022",
month = jan,
day = "1",
doi = "10.1103/PhysRevB.105.014417",
language = "English",
volume = "105",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "1",
}