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

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4]
  1. Univ. of Tunis El-Manar (Tunisia). Dept. of Physics; Univ. of California, Davis, CA (United States). Dept. of Physics
  2. Univ. of California, Davis, CA (United States). Dept. of Computer Science
  3. Univ. of California, Davis, CA (United States). Dept. of Physicsc
  4. Univ. of California, Davis, CA (United States). Dept. of Physics
+ Show Author Affiliations

A central feature of the periodic Anderson model is the competition between antiferromagnetism, mediated by the Ruderman-Kittel-Kasuya-Yosida interaction at small conduction electron-local electron hybridization V, and singlet formation at large V. At zero temperature, and in dimension d>1, these two phases are separated by a quantum critical point Vc. We also use quantum Monte Carlo (QMC) simulations to explore the effect of impurities which have a local hybridization V*c in the antiferromagnetic regime which are embedded in a bulk singlet phase with V>Vc. We then measure the suppression of singlet correlations and the antiferromagnetic correlations which form around the impurity, as well as the size of the resulting domain. Exact diagonalization calculations for linear chains allow us to verify that the qualitative features obtained at intermediate coupling and finite T persist to strong coupling and T=0, regimes which are difficult to access with QMC. Our calculations show an agreement qualitatively with NMR measurements in CeCoIn5-xCdx.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001842; NA0002908
OSTI ID:
1344105
Alternate ID(s):
OSTI ID: 1297272
Journal Information:
Physical Review B, Vol. 94, Issue 8; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Cited By (2)

Tunable magnetism of a hexagonal Anderson droplet on the triangular lattice journal July 2019
Tunable magnetism of a hexagonal Anderson droplet on the triangular lattice text January 2019

Figures / Tables (13)

FIG. 1(p. 4)figure FIG. 1
FIG. 2(p. 4)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 6)figure FIG. 6
FIG. 7(p. 6)figure FIG. 7
FIG. 8(p. 6)figure FIG. 8
FIG. 10(p. 7)figure FIG. 10
FIG. 9(p. 7)figure FIG. 9
FIG. 11(p. 8)figure FIG. 11
FIG. 12(p. 8)figure FIG. 12
FIG. 13(p. 9)figure FIG. 13

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