Antiferromagnetic resonance and two-magnon absorption in an XXZ-chain antiferromagnet Cs2CoCl4
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914042685161472 |
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| author | Soldatov, T. A. Smirnov, A. I. |
| author_facet | Soldatov, T. A. Smirnov, A. I. |
| contents | Magnetic excitations of the exchange-dipole quasi 1D XXZ antiferromagnet are studied in the ordered phase. We observe a transformation of the electron spin resonance (ESR) spectrum when crossing the Néel temperature near 0.2 K. The single-mode ESR of a correlated XXZ chain transforms in the multi-mode spectrum in the ordered phase. The multi-mode spectrum consists mainly of the intensive mode of a single correlated chain, which is surrounded and/or indented by numerous weak satellites. The number of securely fixed modes is eight at magnetic field parallel b-axis and twelve at magnetic field parallel a-axis. Besides of the multi-mode resonance observed at the transverse polarization of the microwave and static magnetic fields, we reveal a wide band of absorption by (k,-k)- pairs of quasiparticles at the longitudinal polarization. This kind of absorption of microwaves occurs both in the ordered and specific spin-liquid phases, revealing the presence of quasiparticles in the specific spin-liquid phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_13953 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Antiferromagnetic resonance and two-magnon absorption in an XXZ-chain antiferromagnet Cs2CoCl4 Soldatov, T. A. Smirnov, A. I. Strongly Correlated Electrons Magnetic excitations of the exchange-dipole quasi 1D XXZ antiferromagnet are studied in the ordered phase. We observe a transformation of the electron spin resonance (ESR) spectrum when crossing the Néel temperature near 0.2 K. The single-mode ESR of a correlated XXZ chain transforms in the multi-mode spectrum in the ordered phase. The multi-mode spectrum consists mainly of the intensive mode of a single correlated chain, which is surrounded and/or indented by numerous weak satellites. The number of securely fixed modes is eight at magnetic field parallel b-axis and twelve at magnetic field parallel a-axis. Besides of the multi-mode resonance observed at the transverse polarization of the microwave and static magnetic fields, we reveal a wide band of absorption by (k,-k)- pairs of quasiparticles at the longitudinal polarization. This kind of absorption of microwaves occurs both in the ordered and specific spin-liquid phases, revealing the presence of quasiparticles in the specific spin-liquid phase. |
| title | Antiferromagnetic resonance and two-magnon absorption in an XXZ-chain antiferromagnet Cs2CoCl4 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.13953 |