In:
Science, American Association for the Advancement of Science (AAAS), Vol. 369, No. 6505 ( 2020-08-14), p. 833-838
Abstract:
In cuprate superconductors with high critical transition temperature
( T c ), light hole-doping
to the parent compound, which is an antiferromagnetic Mott insulator, has been predicted to lead to the formation of small Fermi pockets. These
pockets, however, have not been observed. Here, we investigate the electronic structure of the five-layered
Ba 2 Ca 4 Cu 5 O 10 (F,O) 2 ,
which has inner copper oxide (CuO 2 ) planes with
extremely low disorder, and find small Fermi pockets centered at (π/2, π/2) of the Brillouin zone by angle-resolved photoemission spectroscopy and
quantum oscillation measurements. The d-wave superconducting gap opens along the pocket, revealing the coexistence between superconductivity and
antiferromagnetic ordering in the same CuO 2 sheet.
These data further indicate that superconductivity can occur without contribution from the antinodal region around (π, 0), which is shared by
other competing excitations.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.aay7311
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2020
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11