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 language | English |
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Pages (from-to) | 1213-1214 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 329-333 |
Issue number | II |
DOIs | |
Publication status | Published - May 2003 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering