Demonstrating the model nature of the high-temperature superconductor HgBa$_2$CuO$_{4+Δ}$

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dc.creatorBarisic, Neven
dc.creatorLi, Yuan
dc.creatorZhao, Xudong
dc.creatorCho, Yong-Chan
dc.creatorChabot-Couture, Guillaume
dc.creatorYu, Guichuan
dc.creatorGreven, Martin
dc.date2008-05-10
dc.date.accessioned2026-07-07T09:59:21Z
dc.date.available2026-07-07T09:59:21Z
dc.descriptionThe compound HgBa$_2$CuO$_{4+Δ}$ (Hg1201) exhibits a simple tetragonal crystal structure and the highest superconducting transition temperature (T$_c$) among all single Cu-O layer cuprates, with T$_c$ = 97 K (onset) at optimal doping. Due to a lack of sizable single crystals, experimental work on this very attractive system has been significantly limited. Thanks to a recent breakthrough in crystal growth, such crystals have now become available. Here, we demonstrate that it is possible to identify suitable heat treatment conditions to systematically and uniformly tune the hole concentration of Hg1201 crystals over a wide range, from very underdoped (T$_c$ = 47 K, hole concentration p ~ 0.08) to overdoped (T$_c$ = 64 K, p ~ 0.22). We then present quantitative magnetic susceptibility and DC charge transport results that reveal the very high-quality nature of the studied crystals. Using XPS on cleaved samples, we furthermore demonstrate that it is possible to obtain large surfaces of good quality. These characterization measurements demonstrate that Hg1201 should be viewed as a model high-temperature superconductor, and they provide the foundation for extensive future experimental work.
dc.description15 pages, 6 Figures
dc.identifierhttps://arxiv.org/abs/0805.1497
dc.identifierhttp://arxiv.org/abs/0805.1497
dc.identifierPhys. Rev. B 78, 054518 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.054518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167991
dc.subjectMaterials Science
dc.subjectSuperconductivity
dc.titleDemonstrating the model nature of the high-temperature superconductor HgBa$_2$CuO$_{4+Δ}$
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