铁电超晶体相变中超维拓扑缺陷的证据
Evidence of hyperdimensional topological defects in a ferroelectric supercrystal phase-transition
摘要：
我们进行实时立体宽域成像的铁电相变在KTN：Li。自发极化被观察到形成一个热滞后的三维晶格的相互连接的封闭的磁通模式，跨越整个样品。结果是兼容的超晶体的$N=4$拓扑纹理缺陷所产生的三倍的空间和一倍的时间反演对称性同时被打破。织构超晶体的每个晶格位置作为S $^3$超球在实际空间中的投影而出现，S超球是能够屏蔽体积电荷和铁电应变的扩展体积霍普夫链结构。
英文摘要：
We perform real-time stereoscopic wide-area imaging of a ferroelectric phase-transition in KTN:Li. Spontaneous polarization is observed to form a thermally hysteretic 3D lattice of mutually interlinked closed-flux patterns that spans the entire sample. Results are compatible with a supercrystal of $N=4$ topological texture defects arising as the three-fold spatial and one-fold time-inversion symmetries are simultaneously broken. Each lattice site of the texture supercrystal emerges as the projection in actual space of an S$^3$ hypersphere, an extended volume Hopf-link fabric able to screen both volume charge and ferroelectric strain.
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