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Title: Commensurate and incommensurate spin-density waves and the superconductivity dome in heavy electron systems

Authors:
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1195689
Grant/Contract Number:
FG02-98ER45707
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 92; Journal Issue: 4; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Schlottmann, P. Commensurate and incommensurate spin-density waves and the superconductivity dome in heavy electron systems. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.045115.
Schlottmann, P. Commensurate and incommensurate spin-density waves and the superconductivity dome in heavy electron systems. United States. doi:10.1103/PhysRevB.92.045115.
Schlottmann, P. Thu . "Commensurate and incommensurate spin-density waves and the superconductivity dome in heavy electron systems". United States. doi:10.1103/PhysRevB.92.045115.
@article{osti_1195689,
title = {Commensurate and incommensurate spin-density waves and the superconductivity dome in heavy electron systems},
author = {Schlottmann, P.},
abstractNote = {},
doi = {10.1103/PhysRevB.92.045115},
journal = {Physical Review B},
number = 4,
volume = 92,
place = {United States},
year = {Thu Jul 16 00:00:00 EDT 2015},
month = {Thu Jul 16 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.92.045115

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

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  • Starting from a Kondo-lattice--type description, superconductivity and spin-density-wave coexistence is studied in the heavy-fermion systems. It is shown that the coexistence is energetically stable only in the presence of a supplementary ..delta../sub /ital Q// superconducting order parameter connected to the -type average, where /ital Q/ is the nesting wave vector.
  • A theory of thermodynamic properties of a spin density wave (SDW) in a quasi-two-dimensional system (with a preset impurity concentration x) is constructed. We choose an anisotropic dispersion relation for the electron energy and assume that external magnetic field H has an arbitrary direction relative to magnetic moment M{sub Q}. The system of equations defining order parameters M{sub Q}{sup z}, M{sub Q}{sup {sigma}}, M{sub z}, and M{sup {sigma}} is constructed and transformed with allowance for the Umklapp processes. Special cases when H Double-Vertical-Line M{sub Q} and H Up-Tack M{sub Q} (H{sub Z}H{sup {sigma}} = 0) are considered in detail asmore » well as cases of weak fields H of arbitrary direction. The condition for the transition of the system to the commensurate and incommensurate states of the SDW is analyzed. The concentration dependence of magnetic transition temperature T{sub M} is calculated, and the components of the order parameter for the incommensurate phase are determined. The phase diagram (T,{approx}x) is constructed. The effect of the magnetic field on magnetic transition temperature T{sub M} is analyzed for H{sub Z}H{sup {sigma}} = 0, and longitudinal magnetic susceptibility {chi} Double-Vertical-Line is calculated; this quantity demonstrates the temperature dependence corresponding to a system with a gap for x < x{sub c} and to a gapless state for x > x{sub c}. In the immediate vicinity of the critical impurity concentration (x {approx} x{sub c}), the temperature dependence of the magnetic susceptibility acquires a local maximum. The effect of anisotropy of the electron energy spectrum on the investigated physical quantities is also analyzed.« less
  • We examine possible superconducting (SC) pairing states competing with the spin-density wave (SDW). On the basis of an imperfect-nesting-band model in two dimensions, we investigate a Hamiltonian including the on-site repulsive interaction in addition to the attractive interaction within a mean-field approximation. The present theory is applicable in a unified way to both T/sub c/>T/sub N/ and T/sub c/