Naslov
Angle-resolved photoemission spectroscopy study of HgBa 2 CuO 4+δ

Autori
Vishik, I.M. ; Barišić, Neven ; ... ; Shen, Z.-G.

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 89 (2014); 195141-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
HgBa 2 CuO 4+δ; ARPES

Sažetak
HgBa 2 CuO 4+δ (Hg1201) has been shown to be a model cuprate for scattering, optical, and transport experiments, but angle-resolved photoemission spectroscopy (ARPES) data are still lacking owing to the absence of a charge- neutral cleavage plane. We report on progress in achieving the experimental conditions for which quasiparticles can be observed in the near-nodal region of the Fermi surface. The d - wave superconducting gap in near-optimally- doped Hg1201 is found to have a maximum of 39 meV. At low temperature, a kink is detected in the nodal dispersion at approximately 51 meV below the Fermi level, an energy that is different from other cuprates with comparable T c . The superconducting gap, Fermi surface, and nodal band renormalization measured here provide a crucial momentum-space complement to other experimental probes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA