当前位置: X-MOL 学术Phys. Rev. B › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Magnetism induced by interlayer electrons in the quasi-two-dimensional electrideY2C: Inelastic neutron scattering study
Physical Review B ( IF 3.2 ) Pub Date : 2020-12-04 , DOI: 10.1103/physrevb.102.224406
Hiromu Tamatsukuri , Youichi Murakami , Yoshio Kuramoto , Hajime Sagayama , Masato Matsuura , Yukinobu Kawakita , Satoru Matsuishi , Yasuhito Washio , Takeshi Inoshita , Noriaki Hamada , Hideo Hosono

Magnetic excitations in layered electride Y2C have been found by inelastic neutron scattering. We have observed weak but clear magnetic scattering around the wave number Q=0, but no magnetic order down to the lowest temperature measured (7 K). The imaginary part of the dynamical susceptibility deduced is well described by the Lorentz function of energy E for each momentum Q. The width Γ(Q) of the Lorentzian is proportional to Q(Q2+κ2) with κ14Å at T=7 K. We have also found that with increasing Q the magnetic form factor decays faster than that of a 4d electron in a single Y atom, which indicates a more extended magnetic moment in Y2C. These results provide experimental evidence that the itinerant magnetism in Y2C originates from the anionic electrons that reside in the interlayers. The Curie-Weiss-like behavior of the magnetic susceptibility reported in Y2C is ascribed to the mode coupling effects of spin fluctuations.

中文翻译:

准二维电子Y2C中层间电子诱导的磁性:非弹性中子散射研究

分层驻极体中的磁激发 ÿ2C通过非弹性中子散射已经发现。我们已经观察到波数周围有微弱但清晰的磁散射=0,但没有磁阶降到最低实测温度(7 K)。能量的洛伦兹函数很好地描述了动态磁化率的虚部Ë 每个动量 。宽度Γ 洛伦兹的比例与 2+κ2κ-1个4一种Ť=7 K.我们还发现随着 磁性形状因子的衰减速度比 4d 单个Y原子中的电子,这表明 ÿ2C。这些结果提供了实验证据,证明了ÿ2C源于驻留在中间层中的阴离子电子。报告的磁化率类似于居里-魏斯行为ÿ2C 归因于自旋波动的模式耦合效应。
更新日期:2020-12-04
down
wechat
bug