磁场对电荷密度波化合物中希格斯模式轴向性的调控
Magnetic field control over the axialness of Higgs modes in charge-density wave compounds
AI总结：
本文利用磁场调控稀土三碲化物中轴向希格斯型电荷密度波振幅模式，发现轴向分量与磁场成正比且方向反转时产生90°相移，证明轴向性与磁自由度直接相关，实现了对希格斯模式轴向性的原位控制。
摘要：
理解对称性破缺过程如何从无序中产生有序，是自然界最基本的问题之一。标量希格斯模式——一种有质量的（准）粒子——是这些过程中的关键要素，并随着连续对称性的自发破缺而出现。与之相关的奇异且难以捉摸的轴向对应物，即具有矢量特征的玻色子，可以通过同时破缺多个连续对称性来稳定。在此，我们利用磁场来调控最近在稀土三碲化物中发现的轴向希格斯型电荷密度波振幅模式。我们证明了轴向希格斯分量与外加磁场之间存在比例关系，并且在改变磁场方向时会出现90°的相位移动。这表明轴向特征与磁自由度直接相关。我们的方法为新兴希格斯模式的轴向性开辟了一种原位调控途径。
英文摘要：
Understanding how symmetry-breaking processes generate order out of disorder is among the most fundamental problems of nature. The scalar Higgs mode - a massive (quasi-) particle - is a key ingredient in these processes and emerges with the spontaneous breaking of a continuous symmetry. Its related exotic and elusive axial counterpart, a Boson with vector character, can be stabilized through the simultaneous breaking of multiple continuous symmetries. Here, we employ a magnetic field to tune the recently discovered axial Higgs-type charge-density wave amplitude modes in rare-earth tritellurides. We demonstrate a proportionality between the axial Higgs component and the applied field, and a 90$^{\circ}$ phase shift upon changing the direction of the B-field. This indicates that the axial character is directly related to magnetic degrees of freedom. Our approach opens up an in-situ control over the axialness of emergent Higgs modes.
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