Signatures of coupling between spin waves and Dirac fermions in YbMnBi_2

A. Sapkota; L. Classen; M. B. Slonc; A. T. Savici; V. O. Garlea; Aifeng Wang; J. M. Tranquada; C. Petrovic; I. A. Zaliznyak

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Signatures of coupling between spin waves and Dirac fermions in YbMnBi_2

机译：YbMnBi_2中自旋波与狄拉克费米子之间耦合的特征

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We present inelastic neutron scattering measurements of magnetic excitations in YbMnBii, which reveal features consistent with a direct coupling of magnetic excitations to Dirac fermions. In contrast with the large broadening of magnetic spectra observed in antiferromagnetic metals such as the iron pnictides, here the spin waves exhibit a small but resolvable intrinsic width, consistent with our theoretical analysis. The subtle manifestation of spin-fermion coupling is a consequence of the Dirac nature of the conduction electrons, including the vanishing density of states near the Dirac points. Accounting for the Dirac fermion dispersion specific to YbMnBi_2 leads to particular signatures, such as the nearly wave-vector-independent damping observed in the experiment.

机译：我们目前在YbMnBii中的磁激发的非弹性中子散射测量，揭示了与磁激发与狄拉克费米子直接耦合一致的特征。与在反铁磁性金属（例如铁的铁化物）中观察到的大的光谱拓宽相反，自旋波显示出很小但可分辨的本征宽度，这与我们的理论分析一致。自旋-费米子耦合的微妙表现是传导电子的狄拉克性质的结果，包括狄拉克点附近状态的消失。考虑到特定于YbMnBi_2的狄拉克费米子色散会导致特殊的特征，例如在实验中观察到几乎与波矢无关的阻尼。

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《Physical review》 |2020年第4期|041111.1-041111.5|共5页
作者
A. Sapkota; L. Classen; M. B. Slonc; A. T. Savici; V. O. Garlea; Aifeng Wang; J. M. Tranquada; C. Petrovic; I. A. Zaliznyak;
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Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Upton New York 11973 USA;

Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Upton New York 11973 USA School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55415 USA;

Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA;

Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Upton New York 11973 USA School of Physics Chongqing University Chongqing 400044 China;

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1. Signatures of coupling between spin waves and Dirac fermions in YbMnBi2 [J] . Physical review, B . 2020,第4期

机译：YBMNBI2中旋转波和Dimimons耦合的签名
2. Calculations of the dominant long-range, spin-independent contributions to the interaction energy between two nonrelativistic Dirac fermions from double-boson exchange of spin-0 and spin-1 bosons with spin-dependent couplings [J] . S. Aldaihan, D. E. Krause, J. C. Long, Physical Review D . 2017,第9a12CD期

机译：从双培制的旋转旋转旋转旋转旋转旋转旋转旋转旋转旋转耦合的两个非旋转性Dimions之间的旋转远程对两个非旋转性Dirac池之间的相互作用能量的计算。
3. Calculations of the dominant long-range, spin-independent contributions to the interaction energy between two nonrelativistic Dirac fermions from double-boson exchange of spin-0 and spin-1 bosons with spin-dependent couplings [J] . S. Aldaihan, D. E. Krause, C. Long, Physical review, D . 2017,第9期

机译：从双培制的旋转旋转旋转旋转旋转旋转旋转旋转旋转旋转耦合的两个非旋转性Dimions之间的旋转远程对两个非旋转性Dirac池之间的相互作用能量的计算。
4. Laser pulse waveform control of Dirac fermions in graphene [C] . S. Azar Oliaei Motlagh, Vadym Apalkov, Mark I. Stockman SPIE Conference on Quantum Nanophotonic Materials, Devices, and Systems . 2019

机译：石墨烯中DIRAC码头的激光脉冲波形控制
5. Explorations in Dirac Fermions and Spin Liquids. [D] . Biswas, Rudro Rana. 2011

机译：狄拉克费米子和自旋液体的探索。
6. Entanglement signatures of emergent Dirac fermions: Kagome spin liquid and quantum criticality [O] . Wei Zhu, Xiao Chen, Yin-Chen He, 2018

机译：新兴狄拉克费米子的纠缠签名：Kagome自旋液体和量子临界
7. Calculations of the dominant long-range, spin-independent contributions to the interaction energy between two nonrelativistic Dirac fermions from double-boson exchange of spin-0 and spin-1 bosons with spin-dependent couplings [O] . Aldaihan, S., Krause, D. E., Long, J. C., 2017

机译：计算主要的远程，自旋独立贡献两个非相对论狄拉克费米子之间的相互作用能量具有自旋相关的spin-0和spin-1玻色子的双玻色子交换联轴器

Signatures of coupling between spin waves and Dirac fermions in YbMnBi_2

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