Spectral weight suppression near a metal-insulator transition in a double-layer electron-doped iridate

Gregory Affeldt, Tom Hogan, Christopher L. Smallwood, Tanmoy Das, Jonathan D. Denlinger, Stephen D. Wilson, Ashvin Vishwanath, Alessandra Lanzara
2017 Physical review B  
13 The perovskite iridates Sr 2 IrO 4 and Sr 3 Ir 2 O 7 represent novel systems for exploring the elec-14 tronic structure that is characteristic of Mott insulators upon carrier doping. Using angle-resolved 15 photoemission spectroscopy (ARPES), we reveal a previously unobserved suppression of spectral 16 weight near the Fermi level in the conduction band of very lightly electron-doped (Sr 1−x La x ) 3 Ir 2 O 7 17 followed by a loss of coherence at high temperature. The doping and temperature
more » ... g and temperature dependence of 18 this suppression suggests a correspondence with the antiferromagnetic Mott state. These results 19 connect (Sr 1−x La x ) 3 Ir 2 O 7 to other doped Mott insulators and add to the growing evidence of 20 universal physics in these systems. 21
doi:10.1103/physrevb.95.235151 fatcat:hdmkfnvgxffcpcjk7vtyh3x6rq