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Electron localization into spin-polaron state in MnSi

机译:MnSi中电子局域化为自旋极化子态

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摘要

Strong electron localization into a bound state has been found in both paramagnetic and ferromagnetic states of the transition metal compound MnSi by muon spin-rotation spectroscopy in magnetic fields up to 7 T and from 2 K to room temperature. This bound state, with a characteristic radius R ≈ 0.4 nm and net spin S = 24 ± 2, is consistent with confinement of the electron's wave function within roughly one lattice cell of MnSi and is suggested to be a spin polaron. Such spin polarons may form due to a strong exchange interaction between itinerant electrons and the magnetic electrons of Mn ions of the same 3d type; as such, they might affect the peculiar electronic and magnetic properties of MnSi.
机译:通过μon自旋旋转光谱法在高达7 T和2 K到室温的磁场中,在过渡金属化合物MnSi的顺磁性和铁磁性状态下都发现了强电子定位为束缚态。这种结合态的特征半径R≈0.4 nm,净自旋S = 24±2,与将电子波函数限制在MnSi的一个晶格单元内相一致,并被认为是自旋极化子。此类自旋极化子可能是由于相同3d型Mn离子的流动电子和磁性电子之间的强烈交换相互作用而形成的;因此,它们可能会影响MnSi的特殊电子和磁性。

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