Formation of gapless triplets in the bond-doped spin-gap antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$)
J. Phys.: Condens. Matter 26, 486002 (2014) We report results of an electron spin resonance (ESR) study of a spin-gap antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) (nicknamed PHCC) with chlorine ions partially substituted by bromine. We found that up to 10% of nominal doping the contribution of...
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| creator | Glazkov, V. N Skoblin, G Hüvonen, D Yankova, T. S Zheludev, A |
| description | J. Phys.: Condens. Matter 26, 486002 (2014) We report results of an electron spin resonance (ESR) study of a spin-gap
antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) (nicknamed PHCC) with
chlorine ions partially substituted by bromine. We found that up to 10% of
nominal doping the contribution of the random defects to the absorption spectra
remains at about 0.1% per copper ion, almost the same as in the pure system.
Instead, a particular kind of ESR absorption corresponding to gapless S=1
triplets is observed at low temperatures in samples with high nominal bromine
content x>5%. Increase of bromine concentration also leads to the systematic
broadening of ESR absorption line indicating reduction of the quasi-particles
lifetime. |
| doi_str_mv | 10.48550/arxiv.1401.4665 |
| format | Article |
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antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) (nicknamed PHCC) with
chlorine ions partially substituted by bromine. We found that up to 10% of
nominal doping the contribution of the random defects to the absorption spectra
remains at about 0.1% per copper ion, almost the same as in the pure system.
Instead, a particular kind of ESR absorption corresponding to gapless S=1
triplets is observed at low temperatures in samples with high nominal bromine
content x>5%. Increase of bromine concentration also leads to the systematic
broadening of ESR absorption line indicating reduction of the quasi-particles
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antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) (nicknamed PHCC) with
chlorine ions partially substituted by bromine. We found that up to 10% of
nominal doping the contribution of the random defects to the absorption spectra
remains at about 0.1% per copper ion, almost the same as in the pure system.
Instead, a particular kind of ESR absorption corresponding to gapless S=1
triplets is observed at low temperatures in samples with high nominal bromine
content x>5%. Increase of bromine concentration also leads to the systematic
broadening of ESR absorption line indicating reduction of the quasi-particles
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antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) (nicknamed PHCC) with
chlorine ions partially substituted by bromine. We found that up to 10% of
nominal doping the contribution of the random defects to the absorption spectra
remains at about 0.1% per copper ion, almost the same as in the pure system.
Instead, a particular kind of ESR absorption corresponding to gapless S=1
triplets is observed at low temperatures in samples with high nominal bromine
content x>5%. Increase of bromine concentration also leads to the systematic
broadening of ESR absorption line indicating reduction of the quasi-particles
lifetime.</abstract><doi>10.48550/arxiv.1401.4665</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Strongly Correlated Electrons |
| title | Formation of gapless triplets in the bond-doped spin-gap antiferromagnet (C$_4$H$_{12}$N$_2$)(Cu$_2$Cl$_6$) |
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