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arXiv 1802.05280cond-mat.str-el
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U(1)量子自旋液体中的自旋-晶格耦合

Spin-lattice Coupling in U(1) Quantum Spin Liquids

Sangjin Lee, Eun-Gook Moon

摘要:

量子自旋液体(QSL)是一种具有内在质量纠缠的奇异相。而不是微观自旋,分形粒子和规范波动是涌现的,揭示了QSL的奇异性质。在pyrchlore晶格上具有强自旋-轨道耦合的量子自旋,例如Pr 2 Zr 2 O 7,被认为是具有出射光子的U(1)QSL,无隙激发而不破坏任何对称性,以及出射单极子。量子超晶格中的一个关键问题是量子超晶格的突现自由度与常规自由度之间的相互作用,我们通过构建U(1)量子超晶格中自旋-晶格耦合的一般理论来研究这种相互作用.我们发现,耦合诱导特征声子和光子之间的相互作用。例如,光子在低温下变得比声子更稳定。我们还提出了在实验中探测出射光子的机制,如依赖于U(1)QSL中的自旋-晶格耦合的声衰减和热输运。

英文摘要:

Quantum spin liquids (QSLs) are exotic phases with intrinsic massive entanglements. Instead of microscopic spins, fractionalized particles and gauge fluctuations are emergent, revealing QSLs' exotic natures. Quantum spins with strong spin-orbit coupling on a pyrchlore lattice, for example Pr2Zr2O7, are suggested to host a U(1) QSL with emergent photons, gapless excitations without breaking any symmetries, as well as emergent monopoles. One of the key issues in QSLs is an interplay between emergent degrees of freedom of QSLs and conventional degrees of freedom, and we investigate the interplay by constructing a general theory of spin-lattice coupling in U(1) QSLs. We find that the coupling induces characteristic interplay between phonons and photons. For example, photons become qualitatively more stable than phonons at low temperature. We also propose mechanisms to detect emergent photons in experiments such as sound attenuation and thermal transport relying on spin-lattice coupling in U(1) QSLs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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