Single Hole Dynamics in theCuO2Plane at Half Filling

Comparison of 32-site exact-diagonalization results and ARPES spectral functions for the antiferromagnetic insulatorSr2CuO2Leung1, Wells2, Gooding3 1997Phys. Rev. B748710View full textAdd to dashboardCite

“…Pothuizen et al 19 recently published results suggesting the existence of a k ជ -dependent broadening, similar in spirit to the ideas contained in this paper.…”

Electronic structure of theCu3O4plane ofSchmelz1, Golden2, Haffner3 et al. 1998Phys. Rev. B7241View full textAdd to dashboardCite

“…These higher lying states in the CuO 2 plane oxychloride Sr 2 CuO 2 Cl 2 have recently been the subject of an ARPES study. 16 In this case, the next two features lying at higher BE than the ZRS were attributed to states which, at particular locations in k space ͓⌫, ( ,0͒, and ( , )͔, possess practically pure O 2p character. For Sr 2 CuO 2 Cl 2 the first of these, located at 2.85 eV, has in-plane character, whereas the second feature at ϳ4 eV should have out-of-plane character at ⌫.…”

“…For Sr 2 CuO 2 Cl 2 the first of these, located at 2.85 eV, has in-plane character, whereas the second feature at ϳ4 eV should have out-of-plane character at ⌫. 16 These nonmixing O states are essentially uncorrelated in nature and were suggested to be the origin of the so-called ''1 eV peak'' in the high-T c cuprates, which had been discussed either in terms of an intrinsic feature of the electronic structure, 18 or in terms of a surface state. 19 On inspection of the data in Fig.…”

“…14 Furthermore, the dispersion of the ZRS's formed by photoemission from the undoped CuO 2 and Cu 3 O 4 plane oxychlorides Sr 2 CuO 2 Cl 2 and Ba 2 Cu 3 O 4 Cl 2 has been studied recently using angle resolved photoemission. 8,15,16 In the case of Ba 2 Cu 3 O 4 Cl 2 , two possible ZRS's exist, located on either the Cu A ͑ZRS A ) or Cu B ͑ZRS B ) subsystems. 8 By comparison with model calculations, it could be shown that the dispersion relations of each of these ZRS's depends critically on the spin background of the respective subsystem, whereby ZRS A experiences an antiferromagnetic 9 and ZRS B an effectively paramagnetic spin background.…”

Anisotropic superexchange for nearest and next-nearest coppers in chain, ladder, and lamellar cuprates

“…11,12,14 The hopping matrix elements can be expressed in terms of the Slater-Koster parameters, 18 t 0 = − √ 3(pdσ)/2, t 1 = −(pdσ)/2, and t 2 = (pdπ), for the Cu-O ones, and t 3 = (1/2)((ppσ) + (ppπ)), t 4 = (1/2)((ppσ) − (ppπ)), and t 5 = (ppπ) for the O-O matrix elements. We have used the values (pdσ) = 1.5eV 9,10 and (ppπ) = −0.6eV 19 , and used the relations (ppπ) = − 1 4 (ppσ) and (pdπ) = − 1 2 (pdσ) 20 . 16.…”