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ARPES study on electronic evolution in Ca2-xNaxCuO2Cl2

机译:ARPES研究Ca2-xNaxCuO2Cl2中的电子演化

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Electronic evolution from an antiferromagnetic insulator to a high-T-c superconductor is revealed by angle-resolved photoemission spectroscopy experiments on tetragonal Ca2-xNaxCuO2Cl2 single crystals, which were grown for the first time under high pressures (less than or equal to 5.5 GPa). In an underdoped superconductor (x = 0.1), we found clear fingerprints of the parent magnetic insulator: a shadow band and a large gap-like structure. The results are most likely described by a "chemical potential shift", which contrasts clearly with the "pinned chemical potential" reported for the prototype La2-xSrxCuO4, demonstrating that the route to a high-T-c superconductor is not unique. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 5]
机译:通过对角Ca2-xNaxCuO2Cl2单晶体的角分辨光发射光谱实验,揭示了从反铁磁绝缘体到高T-c超导体的电子演化,该晶体是在高压(小于或等于5.5 GPa)下首次生长的。在掺杂不足的超导体(x = 0.1)中,我们发现母磁绝缘体的清晰指纹:阴影带和大间隙状结构。结果最有可能通过“化学势变”来描述,这与原型La2-xSrxCuO4报道的“固定化学势”形成鲜明对比,表明通往高T-c超导体的途径并非唯一。 (C)2003 Elsevier Science B.V.保留所有权利。 [参考:5]

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