TY - JOUR
T1 - ESR study of sine-Gordon excitations in S = 1/2 antiferromagnetic chain
T2 - Copper benzoate
AU - Asano, Takayuki
AU - Nojiri, Hiroyuki
AU - Inagaki, Yuji
AU - Sakon, Takuo
AU - Boucher, Jean Paul
AU - Ajiro, Yoshitami
AU - Motokawa, Mitsuhiro
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2003/5
Y1 - 2003/5
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.
AB - 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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U2 - 10.1016/S0921-4526(02)02137-3
DO - 10.1016/S0921-4526(02)02137-3
M3 - Article
AN - SCOPUS:0344992083
VL - 329-333
SP - 1213
EP - 1214
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - II
ER -