Q-Balls in the Pseudogap Phase of Superconducting HgBa 2 CuO 4+y

Condensed Matter

article

Gaetano Campi¹  Luisa Barba²  Nikolai D. Zhigadlo³  Andrey A. Ivanov⁴  Alexey P. Menushenkov⁴  Antonio Bianconi¹ 

[1] Institute of Crystallography;Institute of Crystallography, CNR, Sincrotrone Elettra, Strada Statale 14—Km163.5, Area Science Park;CrystMat Company;Department of Solid State Physics and Nanosystems, National Research Nuclear University MEPhI ,(Moscow Engineering Physics Institute);Rome International Center for Materials Science Superstripes RICMASS

关键词: high temperature superconductivity;    synchrotron X-ray diffraction;    charge density waves;    Q-balls;   

DOI  :  10.3390/condmat8010015

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Fast and local probes, such as X-ray spectroscopy, X-ray diffraction (XRD), and X-ray microscopy, have provided direct evidence for nanoscale phase separation in high temperature perovskite superconductors composed of (i) free particles coexisting with (ii) Jahn Teller polarons (i.e., charges associated with local lattice distortions) not detected by slow experimental methods probing only delocalized states. Moreover, these experimental probes have shown the formation of a superstripes phase in the pseudogap regime below T* in cuprates. Here, we focus on the anomalous temperature dependence of short range X-ray diffraction CDW reflection satellites with high momentum transfer, probing both charge and lattice fluctuations in superconducting HgBa2CuO4+y (Hg1201) in the pseudogap regime below T* and above Tc. We report compelling evidence of the anomalous anticorrelation of the coherence volume with the peak maximum amplitude of the CDW XRD satellite by cooling below T*. This anomalous temperature trend of the short-range striped Jahn Teller polaronic CDW puddles is in agreement with predictions of the Q-ball theory of the quark gluon plasma extended to cuprates, providing compelling evidence for non topological soliton puddles of striped condensate of pairs in the pseudogap phase.

【 授权许可】

CC BY