Simultaneous Transitions in Cuprate Momentum-Space Topology and Electronic Symmetry Breaking
| Autor: | Inhee Lee, S. Uchida, Chung Koo Kim, Hiroshi Eisaki, J. C. Davis, Jinho Lee, Michael J. Lawler, Mohammad Hamidian, Sourin Mukhopadhyay, Ines Firmo, Kazuhiro Fujita, Eun-Ah Kim |
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| Rok vydání: | 2014 |
| Předmět: |
Superconductivity
Physics Multidisciplinary Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences Position and momentum space Electronic structure Topology Space (mathematics) Superconductivity (cond-mat.supr-con) Critical point (thermodynamics) Symmetry breaking Topology (chemistry) Phase diagram |
| Zdroj: | Science. 344:612-616 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.1248783 |
| Popis: | The existence of electronic symmetry breaking in the underdoped cuprates, and its disappearance with increased hole-density $p$, are now widely reported. However, the relationship between this transition and the momentum space ($\vec{k}$-space) electronic structure underpinning the superconductivity has not been established. Here we visualize the $\vec{Q}$=0 (intra-unit-cell) and $\vec{Q}\neq$0 (density wave) broken-symmetry states simultaneously with the coherent $\vec{k}$-space topology, for Bi$_2$Sr$_2$CaCu$_2$O$_{8+d}$ samples spanning the phase diagram 0.06$\leq p \leq$0.23. We show that the electronic symmetry breaking tendencies weaken with increasing $p$ and disappear close to $p_c$=0.19. Concomitantly, the coherent $\vec{k}$-space topology undergoes an abrupt transition, from arcs to closed contours, at the same $p_c$. These data reveal that the $\vec{k}$-space topology transformation in cuprates is linked intimately with the disappearance of the electronic symmetry breaking at a concealed critical point. Journal reference added. Main materials: 13 pages, 4 figures. Supplementary materials: 18 pages, 9 figures |
| Databáze: | OpenAIRE |
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