Non-Zhang-Rice Singlet Character of the First Ionization State of T-CuO

We argue that tetragonal CuO (T-CuO) has the potential to finally settle long-standing modeling issues for cuprate physics. We compare the one-hole quasiparticle (qp) dispersion of T-CuO to that of cuprates, in the framework of the strongly correlated (U-dd -> infinity) limit of the three-band Emery model. Unlike in CuO2, magnetic frustration in T-CuO breaks the C-4 rotational symmetry and leads to strong deviations from the Zhang-Rice singlet picture in parts of the reciprocal space. Our results are consistent with angle-resolved photoemission spectroscopy data but in sharp contradiction to those of a one-band model previously suggested for them. These differences identify T-CuO as an ideal material to test a variety of scenarios proposed for explaining cuprate phenomenology.


Published in:
Physical Review Letters, 116, 8, 087002
Year:
2016
Publisher:
College Pk, Amer Physical Soc
ISSN:
0031-9007
Laboratories:




 Record created 2016-04-01, last modified 2018-09-13


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)