High field ESR study of BaCu2(Si1-xGex)2O7 single crystal

Hitoshi Ohta, Kanji Kawakami, Yuji Inagaki, Susumu Okubo, Takashi Kunimoto, Zenji Hiroi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Recent advance of a field theoretical approach of a low-temperature electron spin resonance (ESR) in S=1/2 antiferromagnetic chain, which has Dzyaloshinskii-Moriya (DM) interactions and staggered g-tensor sites, by Oshikawa and Affleck (OA) suggests peculiar magnetic field dependence of ESR. Although BaCu2(Si1-xGex)2O7 is an antiferromagnetic chain system with mixed antiferromagnetic and ferromagnetic interehain interactions, we found that x=0.65 substance shows the peculiar field dependence of ESR predicted by OA theory. The temperature dependence of the line width showed the power-law dependence and strong field dependence in the gapless spinon regime which can be well interpreted by OA theory. The temperature dependence of the resonance shift turned out to be also consistent with OA theory. These results are also discussed in connection with Cu-Benzoate which is considered as a model substance of OA theory.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalProgress of Theoretical Physics
Issue number145 SUPPL.
Publication statusPublished - 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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