Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+δ

Abstract

The pseudogap state between T c and the temperature T*, below which the gap in the DOS occurs, has been the subject of a wide range of theoretical proposals-from those focused on superconducting pairing correlations without phase coherence 14,15 to those based on some form of competing electronic order or proximity to the Mott state [6][7][8][9] . Some

Nanoscale Interplay of Strain and Doping in a High-Temperature Superconductor

“…5 The identity of the primary local variable controlling this electronic inhomogeneity has been debated for more than a decade. Both dopants 6 and strain 7 have been empirically linked with electronic structure.…”

Development of Spatial Inhomogeneity of Internal Magnetic Field Above Tc in Bi2Sr2Ca1−xYxCu2O8+δ Observed by Longitudinal-Field Muon Spin Relaxation

“…24 The error bar of T µ has been determined from the temperature dependence of ∆ shown in is also plotted. 17 The p value has been determined using the empirical relation between T c and p in the high-T c cuprates. 40 Lines are guide for eyes.…”

“…8,9,[14][15][16][17][18][19][20][21][22][23] Supposed that a few nanoscale SC domains are developed in the CuO 2 plane, magnetic fluxes are expelled from the nanoscale SC domains due to the Meissner effect. In this case, the internal magnetic field parallel to the initial muon polarization inside the SC domains decrease and the bending of the magnetic fluxes generates the internal magnetic field perpendicular to the initial J. Phys.…”

“…24 The onset temperature of the inhomogeneous superconductivity obtained by STM, T c STM , in Bi 2 Sr 2 CaCu 2 O 8+δ are also plotted. 17 The p value has been determined using the empirical relation between T c and p in the high-T c cuprates. 40 The value of T µ is 135 ± 19 K far above …”

Interplay of chemical disorder and electronic inhomogeneity in unconventional superconductors

“…15 Almost five years since the initial discovery, the maximum T c in bulk Fe-SCs remains capped at B57 K for Sm 0. 95 17 while superconductivity up to 65 K has very recently been reported in single layer FeSe films. 18 Unconventional superconductivity is also present in some of the strongly-correlated heavy-fermion materials (HFs).…”