Nanoscale Superconducting Honeycomb Charge Order in IrTe2

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• 作者：Hyo Sung Kim ; Sooran Kim ; Kyoo Kim ; Byung Il Min ; Yong-Heum Cho ; Lihai Wang ; Sang-Wook Cheong ; Han Woong Yeom
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：16
• 期：7
• 页码：4260-4265
• 全文大小：470K
• 年卷期：0
• ISSN：1530-6992

文摘

Entanglement of charge orderings and other electronic orders such as superconductivity is in the core of challenging physics issues of complex materials including high temperature superconductivity. Here, we report on the observation of a unique nanometer scale honeycomb charge ordering of the cleaved IrTe₂ surface, which hosts a superconducting state. IrTe₂ was recently established to exhibit an intriguing cascade of stripe charge orders. The stripe phases coexist with a hexagonal phase, which is formed locally and falls into a superconducting state below 3 K. The atomic and electronic structures of the honeycomb and hexagon pattern of this phase are consistent with the charge order nature, but the superconductivity does not survive on neighboring stripe charge order domains. The present work provides an intriguing physics issue and a new direction of functionalization for two-dimensional materials.