تقرير
Dynamical Spectra of Spin Supersolid States in Triangular Antiferromagnets
العنوان: | Dynamical Spectra of Spin Supersolid States in Triangular Antiferromagnets |
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المؤلفون: | Chi, Runze, Hu, Jiahang, Liao, Hai-Jun, Xiang, T. |
سنة النشر: | 2024 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
الوصف: | We employ tensor network renormalization to explore the dynamical spectra of the easy-axis triangular-lattice antiferromagnet (TLAF) in a magnetic field. Our analysis identifies two distinct low-energy magnon excitations: a gapless Goldstone mode and a gapped mode. At zero field, the spectra display two nearly degenerate roton modes near the M point. With the increase of the magnetic field within the Y-shape superfluid phase, these modes diverge, with the roton excitation vanishing from the Goldstone mode branch, suggesting that the roton dip in this mode may just result from the energy-level repulsion imposed by the roton excitation in the gapped mode. Moreover, the in-plane spectral function shows substantial weight in high energies in the same spin excitation channel where the low-energy roton excitation appears. However, these roton excitations are absent in the V-shape supersolid phase. |
نوع الوثيقة: | Working Paper |
URL الوصول: | http://arxiv.org/abs/2404.14163 |
رقم الأكسشن: | edsarx.2404.14163 |
قاعدة البيانات: | arXiv |
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