论文标题
磁波动和莫特绝缘COO中的自旋轨道相互作用
Magnetic Fluctuations and the Spin-Orbit Interaction in Mott Insulating CoO
论文作者
论文摘要
由粉笔河的一支团队在包括最近雇用的研究官罗杰·考利（Roger Cowley）的团队中，在COO中出现了无震动的轨道角动量的动机，在经典的Mott Mott绝缘子上进行了第一个无弹性中子散射实验[Sakurai $ \ Textit $ \ Textit {et al。} $ 1968 $ 1968 Phys Phys Phys。修订版$ \ Mathbf {167} $ 510]。尽管在区域边界处识别磁通模式，但该团队仍无法使用常规的伪波体方法来参数低于$ t \ rm {_ {n}} $的低能磁激发光谱。再过40年，罗杰（Roger）现在在牛津大学（Oxford）发现了高$ t_ {c} $ cuprate超导体的动机[Bednorz＆Muller 1986 Z. phys。 b $ \ mathbf {64} $ 189]，将在以前提到他的磁激发频谱的参数上进行另一次尝试。罗杰（Roger）返回首席运营官后，发现一个陷入争议的系统，其一些最基本的参数仍未确定。面对如此艰巨的任务，罗杰在2010年初的COO和磁性稀释的结构模拟MGO上进行了一系列非弹性中子散射实验。这些实验将证明有助于确定单离子[Cowley $ \ textit {et al。} $ 2013 Phys。 Rev. B $ \ Mathbf {88} $ 205117]和合作磁参数[SARTE $ \ TEXTIT {et al。} $ 2018 PHYS。 Rev. B $ \ Mathbf {98} $ 024415]用于COO。这两种参数最终都将在旋转轨道激子模型[sarte $ \ textit {et al。} $ 2019 phys中使用。 Rev. B $ \ Mathbf {100} $ 075143]，由他的长期朋友和合作者Bill Buyers开发，以成功地参数化了近50年前在Chalk River上测量的复杂频谱。首席运营官的故事是一个完整的圈子，既充满了壮观的失败，又充满了深刻而深刻的胜利。
Motivated by the presence of an unquenched orbital angular momentum in CoO, a team at Chalk River, including a recently hired research officer Roger Cowley, performed the first inelastic neutron scattering experiments on the classic Mott insulator [Sakurai $\textit{et al.}$ 1968 Phys. Rev. $\mathbf{167}$ 510]. Despite identifying magnon modes at the zone boundary, the team was unable to parameterise the low energy magnetic excitation spectrum below $T\rm{_{N}}$ using conventional pseudo-bosonic approaches. It would not be for another 40 years that Roger, now at Oxford and motivated by the discovery of the high-$T_{c}$ cuprate superconductors [Bednorz & Muller 1986 Z. Phys. B $\mathbf{64}$ 189], would make another attempt at the parameterisation of the magnetic excitation spectrum that had previously alluded him. Upon his return to CoO, Roger found a system embroiled in controversy, with some of its most fundamental parameters still remaining undetermined. Faced with such a formidable task, Roger performed a series of inelastic neutron scattering experiments in the early 2010's on both CoO and a magnetically dilute structural analogue MgO. These experiments would prove instrumental in the determination of both single-ion [Cowley $\textit{et al.}$ 2013 Phys. Rev. B $\mathbf{88}$ 205117] and cooperative magnetic parameters [Sarte $\textit{et al.}$ 2018 Phys. Rev. B $\mathbf{98}$ 024415] for CoO. Both these sets of parameters would eventually be used in a spin-orbit exciton model [Sarte $\textit{et al.}$ 2019 Phys. Rev. B $\mathbf{100}$ 075143], developed by his longtime friend and collaborator Bill Buyers, to successfully parameterise the complex spectrum that both measured at Chalk River almost 50 years prior. The story of CoO is of one that has come full circle, one filled with both spectacular failures and intermittent, yet profound, little victories.
