Fractionalized pair density wave in the pseudogap phase of cuprate superconductors
| Autor: | Mohammad Hamidian, J. C. S. Davis, Catherine Pépin, Y. Sidis, Maxence Grandadam, Debmalya Chakraborty |
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| Přispěvatelé: | Groupe 3 axes (G3A), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Institut Rayonnement Matière de Saclay (IRAMIS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Physics [PHYS]Physics [physics] Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Density wave theory law.invention Superconductivity (cond-mat.supr-con) law Condensed Matter::Superconductivity 0103 physical sciences Cuprate Multiplicity (chemistry) Scanning tunneling microscope Cooper pair [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology Pseudogap Phase diagram |
| Zdroj: | Physical Review B Physical Review B, 2019, 100 (22), ⟨10.1103/PhysRevB.100.224511⟩ Physical Review B, American Physical Society, 2019, 100 (22), ⟨10.1103/PhysRevB.100.224511⟩ |
| ISSN: | 2469-9950 2469-9969 |
| Popis: | The mysterious pseudo-gap (PG) phase of cuprate superconductors has been the subject of intense investigation over the last thirty years, but without a clear agreement about its origin. Owing to a recent observation in Raman spectroscopy, of a precursor in the charge channel, on top of the well known fact of a precursor in the superconducting channel, we present here a novel idea: the PG is formed through a Higgs mechanism, where two kinds of preformed pairs, in the particle-particle and particle-hole channels, become entangled through a freezing of their global phase. Remarkably, this entanglement is equivalent to fractionalizing a Cooper pair density wave (PDW) into its elementary parts; the particle-hole pair, giving rise to both density modulations and current modulations, and the particle-particle counterpart, leading to the formation of Cooper pairs. From this perspective, the "fractionalized PDW" becomes the central object around the formation of the pseudo-gap. The "locking" of phases between the charge and superconducting modes gives a unique explanation for the unusual global phase coherence of short-range charge modulations, observed below $T_{c}$ on phase sensitive scanning tunneling microscopy (STM). A simple microscopic model enables us to estimate the mean-field values of the precursor gaps in each channel and the PG energy scale, and to compare them to the values observed in Raman scattering spectroscopy. We also discuss the possibility of a multiplicity of orders in the PG phase and give an overview of the phase diagram. Comment: More theoretical details on the fractionalization perspective, restructured appendices and Fig 5 (c) and (d) added |
| Databáze: | OpenAIRE |
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