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Geometric constraints on phase coexistence in vanadium dioxide single crystals

机译:二氧化钒单晶相中的几何约束

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The appearance of stripe phases is a characteristic signature of strongly correlated quantum materials, and its origin in phase-changing materials has only recently been recognized as the result of the delicate balance between atomic and mesoscopic materials properties. A vanadium dioxide (VO2) single crystal is one such strongly correlated material with stripe phases. Infrared nano-imaging on low-aspect-ratio, single- crystal VO2 microbeams decorated with resonant plasmonic nanoantennas reveals a novel herringbone pattern of coexisting metallic and insulating domains intercepted and altered by ferroelastic domains, unlike previous reports on high-aspect-ratio VO2 crystals where the coexisting metal/insulator domains appear as alternating stripe phases perpendicular to the growth axis. The metallic domains nucleate below the crystal surface and grow towards the surface with increasing temperature as suggested by the near-field plasmonic response of the gold nanorod antennas.
机译:条纹相的外观是具有强烈相关量子材料的特征特征,并且其在相变材料中的起源最近仅被认为是原子和介质材料之间的微妙平衡的结果。 二氧化钒(VO2)单晶是一种具有条纹相的这种强相关的材料。 用谐振等离子体纳米纳米纳米的单晶VO2微观射出的单晶VO2微观射击揭示了一种新的人字形图案,其共存和通过铁弹性域截取和改变的金属和绝缘结构域不同,与先前的高纵横比VO2晶体有不同 在那里共存金属/绝缘体域显示为垂直于生长轴的交替条纹相。 金属域在晶体表面下方核心并朝向表面的增长,随着金纳米棒天线的近场等离子体响应而提出的升高。

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