ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain: Copper benzoate

Takayuki Asano, Hiroyuki Nojiri, Yuji Inagaki, Takuo Sakon, Jean Paul Boucher, Yoshitami Ajiro, Mitsuhiro Motokawa

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We investigate electron spin resonance (ESR) on Cu benzoate, Cu(C 6H5COO)2 · 3H2O, which is an ideal model substance of S = 1/2 antiferromagnetic Heisenberg chain (AFHC) with staggered field. Theoretically, S = 1/2 AFHC subjected to the staggered field exemplifies a good realization of a quantum sine-Gordon (SG) model. In fact, under magnetic fields, this compound develops an energy gap Eg(H) in the low-lying SG excitation spectra as a function of the applied magnetic field H. In the previous work, we observed the SG-breather excitation for the first time, in wide-field range up to 30 T by means of ESR under Faraday configuration. In this work, we report a direct observation of the SG-soliton/antisoliton excitation by ESR under Voigt configuration. Thus, all solutions of the SG equation are now experimentally demonstrated by means of ESR technique.

Original languageEnglish
Pages (from-to)1213-1214
Number of pages2
JournalPhysica B: Condensed Matter
Volume329-333
Issue numberII
DOIs
Publication statusPublished - May 2003

Fingerprint

Benzoates
Paramagnetic resonance
Copper
electron paramagnetic resonance
copper
excitation
sine-Gordon equation
Magnetic fields
configurations
Solitons
magnetic fields
Energy gap
solitary waves

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain : Copper benzoate. / Asano, Takayuki; Nojiri, Hiroyuki; Inagaki, Yuji; Sakon, Takuo; Boucher, Jean Paul; Ajiro, Yoshitami; Motokawa, Mitsuhiro.

In: Physica B: Condensed Matter, Vol. 329-333, No. II, 05.2003, p. 1213-1214.

Research output: Contribution to journalArticle

Asano, T, Nojiri, H, Inagaki, Y, Sakon, T, Boucher, JP, Ajiro, Y & Motokawa, M 2003, 'ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain: Copper benzoate', Physica B: Condensed Matter, vol. 329-333, no. II, pp. 1213-1214. https://doi.org/10.1016/S0921-4526(02)02137-3
Asano, Takayuki ; Nojiri, Hiroyuki ; Inagaki, Yuji ; Sakon, Takuo ; Boucher, Jean Paul ; Ajiro, Yoshitami ; Motokawa, Mitsuhiro. / ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain : Copper benzoate. In: Physica B: Condensed Matter. 2003 ; Vol. 329-333, No. II. pp. 1213-1214.
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AU - Boucher, Jean Paul

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AU - Motokawa, Mitsuhiro

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N2 - We investigate electron spin resonance (ESR) on Cu benzoate, Cu(C 6H5COO)2 · 3H2O, which is an ideal model substance of S = 1/2 antiferromagnetic Heisenberg chain (AFHC) with staggered field. Theoretically, S = 1/2 AFHC subjected to the staggered field exemplifies a good realization of a quantum sine-Gordon (SG) model. In fact, under magnetic fields, this compound develops an energy gap Eg(H) in the low-lying SG excitation spectra as a function of the applied magnetic field H. In the previous work, we observed the SG-breather excitation for the first time, in wide-field range up to 30 T by means of ESR under Faraday configuration. In this work, we report a direct observation of the SG-soliton/antisoliton excitation by ESR under Voigt configuration. Thus, all solutions of the SG equation are now experimentally demonstrated by means of ESR technique.

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