Buried double CuO chains in YBa${}_2$Cu${}_4$O${}_8$ uncovered by nano-ARPES

Hideaki Iwasawa, Pavel Dudin, Kyosuke Inui +4

The electron dynamics in the CuO chains has been elusive in Y-Ba-Cu-O cuprate systems by means of standard angle-resolved photoemission spectroscopy (ARPES); cleaved sample exhibit…