论文标题
在二氧化钒的名义磁磁性绝缘状态下低温下的自旋塞贝克效应
Spin Seebeck effect at low temperatures in the nominally paramagnetic insulating state of vanadium dioxide
论文作者
论文摘要
二氧化钒的低温单斜层，绝缘阶段通常被认为是非磁性的，二聚钒原子形成了自旋单重，尽管在低温下可以看到顺磁反应。我们在VO2膜中发现了一个非局部自旋Seebeck信号，该信号出现在30 K以下，并且随温度降低而增加。旋转Seebeck响应对平面外部磁场具有非滞后依赖性。通过先前关于顺磁性自旋seebeck效应的效应和单斜基基态的预期磁激励的发现，讨论了这种顺磁性自旋seebeck响应。
The low temperature monoclinic, insulating phase of vanadium dioxide is ordinarily considered nonmagnetic, with dimerized vanadium atoms forming spin singlets, though paramagnetic response is seen at low temperatures. We find a nonlocal spin Seebeck signal in VO2 films that appears below 30 K and which increases with decreasing temperature. The spin Seebeck response has a non-hysteretic dependence on in-plane external magnetic field. This paramagnetic spin Seebeck response is discussed in terms of prior findings on paramagnetic spin Seebeck effects and expected magnetic excitations of the monoclinic ground state.
