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arXiv 0803.3720cond-mat.str-el
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压力下的量子磁体:控制TlCuCl3中的元激发

Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3

Ch. Rüegg, B. Normand, M. Matsumoto, A. Furrer, D. McMorrow, K. Krämer, H. -U. Güdel, S. Gvasaliya, H. Mutka, M. Boehm

摘要:

我们遵循的量子反铁磁体TlCuCl 3的元激发的演化通过压力诱导的量子临界点,它将基于二聚体的量子无序相从长程磁序相分离。我们证明了中子能谱的连续出现在弱有序状态的一个低洼,但大量的激发对应的纵向波动的磁矩。这种模式并不存在于有序磁体的经典描述中,而是量子临界点的直接结果。

英文摘要:

We follow the evolution of the elementary excitations of the quantum antiferromagnet TlCuCl3 through the pressure-induced quantum critical point, which separates a dimer-based quantum disordered phase from a phase of long-ranged magnetic order. We demonstrate by neutron spectroscopy the continuous emergence in the weakly ordered state of a low-lying but massive excitation corresponding to longitudinal fluctuations of the magnetic moment. This mode is not present in a classical description of ordered magnets, but is a direct consequence of the quantum critical point.

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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