TY - JOUR
T1 - On the contrasting spin dynamics of La2-xSrxCuO 4, Nd2-xCexCuO4 and YBa 2Cu3O6+x near half filling
AU - Chubukov, A. V.
AU - Musaelian, K. A.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - We present simple calculations which show that the incommensurability upon doping and the width of the magnetically ordered phase in Mott-Hubbard insulators depend strongly on the location of the hole/electron pockets in the Brillouin zone. For LaSrCuO systems, we found the pockets at (+or- pi /2,+or- pi /2), in which case the corrections to the antiferromagnetic spin stiffness rapidly grow with doping and destroy commensurate spin ordering even at a very small doping. On the other hand, in NdCeCuO, the hole pockets are located at ( pi ,0) and the symmetry-related points, in which case the corrections to the stiffness scale linearly with the density of carriers and do not destroy commensurate spin ordering. For YBCO systems, the situation is less certain, but our results favour hole pockets at ( pi /2, pi /2). We also briefly discuss the tendency towards phase separation.
AB - We present simple calculations which show that the incommensurability upon doping and the width of the magnetically ordered phase in Mott-Hubbard insulators depend strongly on the location of the hole/electron pockets in the Brillouin zone. For LaSrCuO systems, we found the pockets at (+or- pi /2,+or- pi /2), in which case the corrections to the antiferromagnetic spin stiffness rapidly grow with doping and destroy commensurate spin ordering even at a very small doping. On the other hand, in NdCeCuO, the hole pockets are located at ( pi ,0) and the symmetry-related points, in which case the corrections to the stiffness scale linearly with the density of carriers and do not destroy commensurate spin ordering. For YBCO systems, the situation is less certain, but our results favour hole pockets at ( pi /2, pi /2). We also briefly discuss the tendency towards phase separation.
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U2 - 10.1088/0953-8984/7/1/012
DO - 10.1088/0953-8984/7/1/012
M3 - Article
AN - SCOPUS:0001071501
SN - 0953-8984
VL - 7
SP - 133
EP - 142
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
IS - 1
M1 - 012
ER -