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Title: Impurity-induced antiferromagnetic domains in the periodic Anderson model

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1297272
Grant/Contract Number:
NA0002908
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 8; Related Information: CHORUS Timestamp: 2016-08-17 18:10:50; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Benali, A., Bai, Z. J., Curro, N. J., and Scalettar, R. T.. Impurity-induced antiferromagnetic domains in the periodic Anderson model. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.085132.
Benali, A., Bai, Z. J., Curro, N. J., & Scalettar, R. T.. Impurity-induced antiferromagnetic domains in the periodic Anderson model. United States. doi:10.1103/PhysRevB.94.085132.
Benali, A., Bai, Z. J., Curro, N. J., and Scalettar, R. T.. 2016. "Impurity-induced antiferromagnetic domains in the periodic Anderson model". United States. doi:10.1103/PhysRevB.94.085132.
@article{osti_1297272,
title = {Impurity-induced antiferromagnetic domains in the periodic Anderson model},
author = {Benali, A. and Bai, Z. J. and Curro, N. J. and Scalettar, R. T.},
abstractNote = {},
doi = {10.1103/PhysRevB.94.085132},
journal = {Physical Review B},
number = 8,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.94.085132

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • We study the two-dimensional periodic Anderson model at half filling using quantum Monte Carlo (QMC) techniques. The ground state undergoes a magnetic order-disorder transition as a function of the effective exchange coupling between the conduction and localized bands. Low-lying spin and charge excitations are determined using the maximum entropy method to analytically continue the QMC data. At finite temperature we find a competition between the Kondo effect and antiferromagnetic order which develops in the localized band through Ruderman-Kittel-Kasuya-Yosida interactions.
  • Cited by 2
  • We have developed a new efficient and accurate impurity solver for the single impurity Anderson model (SIAM), which is based on a non-perturbative recursion technique in a space of operators and involves expanding the self-energy as a continued fraction. The method has no special occupation number or temperature restrictions; the only approximation is the number of levels of the continued fraction retained in the expansion. We also show how this approach can be used as a new approach to Dynamical Mean Field Theory (DMTF) and illustrate this with the Hubbard model. The three lowest orders of recursion give the Hartree-Fock,more » Hubbard I, and Hubbard III approximations. A higher level of recursion is able to reproduce the expected 3-peak structure in the spectral function and Fermi liquid behavior.« less
  • The q-dependent magnetic susceptibility chi(q) and effective moment ..mu../sub eff/(q) of heavy-fermion quasiparticles are studied at T = 0 in the Zou-Anderson spin-orbit-coupling model for the simple cubic lattice. Antiferromagnetic (q = Q) correlations are shown to be dominantly enhanced by interband effects for relatively large quasiparticle fillings. The obtained moments ..mu../sub eff//sup 2/(0)/similar to/1.20..mu../sub B//sup 2/ and ..mu../sub eff//sup 2/(Q)/similar to/0.7..mu../sub B//sup 2/ are in good agreement with the Zou-Anderson value and the experimental value for CeAl/sub 2/, respectively, but are in disagreement with the experimental values for CeCu/sub 2/Si/sub 2/ and CeAl/sub 3/.
  • We present results of quantum Monte Carlo simulations of the degenerate, single-impurity, Anderson model. Using maximum-entropy methods, we performed the analytic continuation of the imaginary-time Green's functions produced by these simulations to obtain their real-frequency, single-particle, spectral densities for degeneracies of [ital N]=2, 4, and 6. Incorporating higher degeneracies into the model enables us, on the one hand, to compare Monte Carlo results with the self-consistent large-[ital N] approximation (NCA) and numerical-renormalization-group calculations (NGR) and, on the other hand, to bring the models closer to the physical systems. The low temperatures reached in our calculations are comparable to, or evenmore » lower than, the corresponding Kondo temperatures. The NCA and NRG calculations were found to show qualitatively good agreement with our results: the Kondo temperature increases with increasing degeneracy, and the amplitude of the side peaks in the spectral density decreases as degeneracy increases while the half-width of these peaks increases.« less