Adiabatic approximation for localized electrons in periodic Anderson model

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Adiabatic approximation for localized electrons in periodic Anderson model. / Kochetov, E.; Yarunin, V.; Zhuravlev, M.

In: Physica C: Superconductivity and its Applications, Vol. 296, No. 3-4, 20.02.1998, p. 298-306.

Research output: Contribution to journal › Article › peer-review

Author

Kochetov, E. ; Yarunin, V. ; Zhuravlev, M. / Adiabatic approximation for localized electrons in periodic Anderson model. In: Physica C: Superconductivity and its Applications. 1998 ; Vol. 296, No. 3-4. pp. 298-306.

BibTeX

@article{30b656d7c5774e3a85673fc4dbadb773,

title = "Adiabatic approximation for localized electrons in periodic Anderson model",

abstract = "The partition function of the periodic Anderson model for an infinite U-term is represented by the path integral over the Grassmann variables for band s-electrons and supercoherent SU(2\1) variables for localized d-electrons. The effective electron action is obtained for d-electrons with a level E < 0 through the averaging of the thermal distribution over the s-electron trajectories. Due to the spinon-charge separation in the path integral over the d-variables, the low-temperature and spin mean-field approximations are introduced and are shown to lead to the adiabatic approximation suggested earlier. Non-linear dependence of the chemical potential μ on the electron concentration n < 1 is established for the narrow s-electron band w ≪ |E\ and the Kondo-like temperature behavior is found for n > 1 in wide w ≪ |E\ s-electron band.",

keywords = "Anderson lattice, Band structure, Hubbard variables, SU(2\1) coherent states",

author = "E. Kochetov and V. Yarunin and M. Zhuravlev",

year = "1998",

month = feb,

day = "20",

doi = "10.1016/S0921-4534(97)01827-3",

language = "English",

volume = "296",

pages = "298--306",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "3-4",

}

RIS

TY - JOUR

T1 - Adiabatic approximation for localized electrons in periodic Anderson model

AU - Kochetov, E.

AU - Yarunin, V.

AU - Zhuravlev, M.

PY - 1998/2/20

Y1 - 1998/2/20

N2 - The partition function of the periodic Anderson model for an infinite U-term is represented by the path integral over the Grassmann variables for band s-electrons and supercoherent SU(2\1) variables for localized d-electrons. The effective electron action is obtained for d-electrons with a level E < 0 through the averaging of the thermal distribution over the s-electron trajectories. Due to the spinon-charge separation in the path integral over the d-variables, the low-temperature and spin mean-field approximations are introduced and are shown to lead to the adiabatic approximation suggested earlier. Non-linear dependence of the chemical potential μ on the electron concentration n < 1 is established for the narrow s-electron band w ≪ |E\ and the Kondo-like temperature behavior is found for n > 1 in wide w ≪ |E\ s-electron band.

AB - The partition function of the periodic Anderson model for an infinite U-term is represented by the path integral over the Grassmann variables for band s-electrons and supercoherent SU(2\1) variables for localized d-electrons. The effective electron action is obtained for d-electrons with a level E < 0 through the averaging of the thermal distribution over the s-electron trajectories. Due to the spinon-charge separation in the path integral over the d-variables, the low-temperature and spin mean-field approximations are introduced and are shown to lead to the adiabatic approximation suggested earlier. Non-linear dependence of the chemical potential μ on the electron concentration n < 1 is established for the narrow s-electron band w ≪ |E\ and the Kondo-like temperature behavior is found for n > 1 in wide w ≪ |E\ s-electron band.

KW - Anderson lattice

KW - Band structure

KW - Hubbard variables

KW - SU(2\1) coherent states

UR - http://www.scopus.com/inward/record.url?scp=0032000197&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(97)01827-3

DO - 10.1016/S0921-4534(97)01827-3

M3 - Article

AN - SCOPUS:0032000197

VL - 296

SP - 298

EP - 306

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 3-4

ER -

ID: 51232116