论文标题
揭示Paramagnets中相互作用的物理学
Unveiling the Physics of the Mutual Interactions in Paramagnets
论文作者
论文摘要
在实际Paramagnets中，总是对系统能量有微妙的多体贡献，可以将其视为一个小的有效局部磁场$ b_ {loc} $。通常，它被忽略了，因为与热波动和/或外部磁场$ b $相比，它很小。然而，由于温度$ t \ rightarrow $ 0k和$ b \ rightarrow $ 0T，这种多体贡献变得无处不在。在这里，采用磁性grüneisen参数$γ_{mag} $和熵参数，我们报告了在超低$ t $的政权中相互交互作用的关键作用，并消失了$ b $。我们的关键结果是：$ i $）由于存在$ b_ {loc} $，因此没有真正的零场量子相变； $ ii $）温度的规范定义与$γ_{mag} $之间的连接;和$ iii $）仅通过操纵相互作用来执行绝热磁化的可能性。我们的发现揭示了从相互作用出现的前所未有的方面。
In real paramagnets, there is always a subtle many-body contribution to the system's energy, which can be regarded as a small effective local magnetic field $B_{loc}$. Usually, it is neglected, since it is very small when compared with thermal fluctuations and/or external magnetic fields $B$. Nevertheless, as both the temperature $T \rightarrow$ 0K and $B \rightarrow$ 0T, such many-body contributions become ubiquitous. Here, employing the magnetic Grüneisen parameter $Γ_{mag}$ and entropy arguments, we report on the pivotal role played by the mutual interactions in the regime of ultra-low-$T$ and vanishing $B$. Our key results are: $i$) absence of a genuine zero-field quantum phase transition due to the presence of $B_{loc}$; $ii$) connection between the canonical definition of temperature and $Γ_{mag}$; and $iii$) possibility of performing adiabatic magnetization by only manipulating the mutual interactions. Our findings unveil unprecedented aspects emerging from the mutual interactions.
