正方形反棱柱形八氰尿酸盐的光致双向磁性与单向电子学
Photoinduced Bidirectional Magnetism against Monodirectional Electronics in Square-Antiprismatic Octacyanometalates
摘要：
用蓝光照射${\rm Cu}_2{\rm Mo}({\rm CN})_8\cdot 8{\rm H}_2{\rm O}$会引起整体磁化，而随后用红光或更长波长的光照射会使这种材料退磁。我们求解了含时的薛定谔方程，得到了一个扩展的哈伯德模型，再现了光可逆磁性。通过对光诱导光电导谱和角分辨光电子能谱的测量，我们揭示了磁通过铁磁性的往返远不是电子学的返回。虽然在钨类似物${\rm Cu}_2{\rm W}({\rm CN})_8\cdot 5{\rm H}_2{\rm O}$中从未观察到可见光诱导的磁化，但红外光照射也可以使这种材料磁化。
英文摘要：
Irradiating ${\rm Cu}_2{\rm Mo}({\rm CN})_8\cdot 8{\rm H}_2{\rm O}$ with blue light induces a global magnetization, whereas succeeding irradiations with red or longer-wavelength light demagnetize this material. We solve the time-dependent Schrödinger equation for an extended Hubbard model to reproduce the photoreversible magnetism. Monitoring the photoinduced optical-conductivity and angle-resolved-photoemission spectra, we reveal that the magnetic round trip by way of ferromagnetism is far from a return in terms of electronics. While visible-light-induced magnetization has never been observed in the tungsten analog ${\rm Cu}_2{\rm W}({\rm CN})_8\cdot 5{\rm H}_2{\rm O}$, infrared-light irradiation may magnetize this material as well.
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