TY - JOUR
T1 - Excitation spectra of two-impurity and multi-channel Kondo systems by the numerical renormalization group method
AU - Sakai, Osamu
AU - Shimizu, Yukihiro
AU - Kaneko, Nobuhisa
N1 - Funding Information:
The authors would like to thank T. Kasuya, H. Shiba and T. Saso for stimulating discussions. This work was partly supported by a Grant-in-Aid for Scientific Research on Priority Area, Computational Physics as a Frontier in Condensed Matter Research, from the Ministry of Education, Science and Culture. The numerical computation was performed at the computer centers of Tohoku University and the Institute for Molecular Science.
PY - 1993/5/2
Y1 - 1993/5/2
N2 - Excitation spectra of the two-impurity Anderson model are calculated. The low energy scale, ω1 TK, is approximately given as ( (J-JC 0.4 TK)2+( t 23 TK)2 near the critical point, where TK is the temperature, J the exchange constant between local spin pair and t and f-f transfer integral. The ω1-1, while the antiferromagnetic susceptibility is proportional to ω1-1. When J≅0, the Kondo effect is depressed by the f-f transfer mainly through the induced exchange coupling. The ground state of the Anderson model with multiplet splitting usually becomes singlet, but various stages of compensation appear. Excitation spectra of an over-compensated system with two channels are calculated.
AB - Excitation spectra of the two-impurity Anderson model are calculated. The low energy scale, ω1 TK, is approximately given as ( (J-JC 0.4 TK)2+( t 23 TK)2 near the critical point, where TK is the temperature, J the exchange constant between local spin pair and t and f-f transfer integral. The ω1-1, while the antiferromagnetic susceptibility is proportional to ω1-1. When J≅0, the Kondo effect is depressed by the f-f transfer mainly through the induced exchange coupling. The ground state of the Anderson model with multiplet splitting usually becomes singlet, but various stages of compensation appear. Excitation spectra of an over-compensated system with two channels are calculated.
UR - http://www.scopus.com/inward/record.url?scp=0027905334&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027905334&partnerID=8YFLogxK
U2 - 10.1016/0921-4526(93)90565-N
DO - 10.1016/0921-4526(93)90565-N
M3 - Article
AN - SCOPUS:0027905334
SN - 0921-4526
VL - 186-188
SP - 323
EP - 327
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - C
ER -