MAGNETIC EXCITATIONS IN SMB6 SINGLE-CRYSTALS
MAGNETIC EXCITATIONS IN SMB6 SINGLE-CRYSTALS
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DOI：
10.1016/0921-4526(93)90580-y
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发表时间：
1993-05-01
影响因子：
2.8
通讯作者：
SADIKOV, IP
中科院分区：
文献类型：
--
作者：
ALEKSEEV, PA;MIGNOT, JM;SADIKOV, IP
用中子非弹性散射测量方法研究了混合价（SmB_6）-Sm-154-B-11单晶在能量homeGa_1 BAR约等于36和homeGa_2 BAR约等于14 meV时的两个基本上无色散的磁激发。后者随加热或随Q值的增大而明显减小。这是由于自旋翻转的5d电子形成一个绑定状态与4f电子的一个给定的网站通过隧道的八面体定义由它的六个最近的Sm邻居。
Two, essentially dispersionless, magnetic excitations, at energies homega1BAR almost-equal-to 36 and homega2BAR almost-equal-to 14 meV, have been investigated by inelastic neutron scattering measurements on a single crystal of mixed-valent (SmB6)-Sm-154-B-11. The latter one decreases markedly upon heating, or with increasing Absolute value of Q. It is ascribed to the spin-flip of 5d electrons which form a bound state with the 4f electrons of a given site by tunnelling over the octahedron defined by its six nearest Sm neighbours.