Electron-magnon interaction in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi><mml:mi mathvariant="normal">NiBC</mml:mi></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">Er</mml:mi><mml:mo>,</mml:mo></mml:math>Ho, Dy, Tb, and Gd) series of compounds based on magnetoresistance measurements

Fontes, M. B.; Tróchez, J. C.; Giordanengo, B.; Bud’ko, S.L.; Sánchez, D. R.; Baggio‐Saitovitch, E.; Continentino, M. A.

doi:10.1103/physrevb.60.6781

Cited by 92 publications

(57 citation statements)

References 22 publications

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“…19 crystallographically oriented thin plates of the nonsuperconducting HoNiBC compound have been observed in selected parts of as-grown HoNi 2 B 2 C crystals. It is well-known that the 1:1:1:1 compound HoNiBC exhibits long-range magnetic order below T N ≃10 K [31]. Therefore, the observation of a 'magnetic' peak persisting up to 10 K may be connected with admixture of 1:1:1:1 phase.…”

Section: 'Magnetic' Peakmentioning

confidence: 96%

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

et al. 2007

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Point-contact (PC) spectroscopy measurements on antiferromagnetic (AF) (TN ≃5.2 K) HoNi2B2C single crystals in the normal and two different superconducting (SC) states (Tc ≃8.5 K and T * c ≃ 5.6 K) are reported. The PC study of the electron-boson(phonon) interaction (EB(P)I) spectral function reveals pronounced phonon maxima at 16, 22 and 34 meV. For the first time the high energy maxima at about 50 meV and 100 meV are resolved. Additionally, an admixture of a crystalline-electric-field (CEF) excitations with a maximum near 10 meV and a 'magnetic' peak near 3 meV are observed. The contribution of the 10-meV peak in PC EPI constant λPC is evaluated as 20-30%, while contribution of the high energy modes at 50 and 100 meV amounts about 10% for each maxima, so the superconductivity might be affected by CEF excitations. The SC gap in HoNi2B2C exhibits a standard single-band BCS-like dependence, but vanishes at T * c ≃ 5.6 K< Tc, with 2∆/kBT * c ≃ 3.9. The strong coupling Eliashberg analysis of the low-temperature SC phase with T * c ≃ 5.6 K ∼ TN, coexisting with the commensurate AF structure, suggests a sizable value of the EPI constant λs ∼ 0.93. We also provide strong support for the recently proposed by us "Fermi surface (FS) separation" scenario for the coexistence of magnetism and superconductivity in magnetic borocarbides, namely, that the superconductivity in the commensurate AF phase survives at a special (nearly isotropic) FS sheet without an admixture of Ho 5d states. Above T * c the SC features in the PC characteristics are strongly suppressed pointing to a specific weakened SC state between T * c and Tc.

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Section: 'Magnetic' Peakmentioning

confidence: 96%

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

et al. 2007

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“…1 was originally derived to describe electronmagnon scattering due to ferromagnetic magnons. 37 However, the magnons observed in URu 2 Si 2 are of antiferromagnetic nature and the following expression should, in principle, be used to fit the electrical resistivity: 37,38 …”

Section: B Stabilization Of the Ho Phasementioning

confidence: 99%

Twofold enhancement of the hidden-order/large-moment antiferromagnetic phase boundary in the URu2−xFexSi
Kanchanavatee
¹
,
Janoschek
²
,
Baumbach
³

et al. 2011
Phys. Rev. B
47
13
77
1
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Electrical resistivity, specific heat, and magnetization measurements on URu2−xFexSi2 reveal a two-fold enhancement of the "hidden order" (HO)/large moment antiferromagnetic (LMAFM) phase boundary T0(x). The T0(P ch ) curve, obtained by converting x to "chemical pressure" P ch , is strikingly similar to the T0(P ) curve, where P is applied pressure, for URu2Si2 − both exhibit a "kink" at 1.5 GPa and a maximum at ∼ 7 GPa. This similarity suggests that the HO-LMAFM transition at 1.5 GPa in URu2Si2 occurs at x ≈ 0.2 (P ch ≈ 1.5 GPa) in URu2−xFexSi2. URu2−xFexSi2 provides an opportunity for studying the HO and LMAFM phases with methods that probe the electronic structure (e.g. STM, ARPES, PCS) but cannot be used under pressure.

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“…In the case of antiferromagnetic ͑AFM͒ system, the electron-magnon coupling 24 ͉g k ជ͉ 2 ϰ k and the energy dispersion relation 36 is ប k ជ = ͱ ⌬ …”

Section: Appendix B: Antiferromagnetic Casementioning

confidence: 99%

Magnetization and electrical-transport investigation of the dense Kondo systemCeAgSb2

et al. 2005

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Of the dense Kondo materials in the class CeTSb 2 ͑where T = Au, Ag, Ni, Cu, or Pd͒, CeAgSb 2 is special due to its complex magnetic ground state, which exhibits both ferromagnetic and antiferromagnetic character below an ordering temperature T O ϳ 9.8 K. To further elucidate a description of this magnetic ground state, we have carried out a systematic study of single crystalline CeAgSb 2 by magnetic, electrical magneto-transport, and Shubnikov-de Haas ͑SdH͒ studies. We have constructed the magnetic phase diagram based solely on magnetoresistance data. Here, depending on the orientation of the magnetic field H, either ferromagnetic or antiferromagnetic ordering occurs below T O . At zero field the temperature-dependent resistivity below T O is most consistent with antiferromagnetic order, based on the transport theory which includes magnon scattering. The crystal-field-effect theory applied to the susceptibility data yields splitting energies from the ground state to the first and second excited states of 53 K and 137 K, respectively. Based on different models to determine the Kondo temperature T K , we can obtain both low-temperature and high-temperature estimates for T K of ϳ23 K and ϳ65 K, respectively. In the Fermi surface studies, the measurements show very small Fermi surface sections, not predicted by band-structure calculations, and the SdH amplitudes are very sensitive to field direction.

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Electron-magnon interaction inRNiBC(R=Er,Ho, Dy, Tb, and Gd) series of compounds based on magnetoresistance measurements

Cited by 92 publications

References 22 publications

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

Twofold enhancement of the hidden-order/large-moment antiferromagnetic phase boundary in the URu2−xFexSi
Kanchanavatee
¹
,
Janoschek
²
,
Baumbach
³

et al. 2011
Phys. Rev. B
47
13
77
1
View full text Add to dashboard Cite

Magnetization and electrical-transport investigation of the dense Kondo systemCeAgSb2

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Electron-magnon interaction inRNiBC(R=Er,Ho, Dy, Tb, and Gd) series of compounds based on magnetoresistance measurements

Cited by 92 publications

References 22 publications

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

Point-contact spectroscopy of the antiferromagnetic superconductorHoNi2B2Cin the normal and superconducting state

Twofold enhancement of the hidden-order/large-moment antiferromagnetic phase boundary in the URu2−xFexSiKanchanavatee1, Janoschek2, Baumbach3 et al. 2011Phys. Rev. B4713771View full textAdd to dashboardCite

Magnetization and electrical-transport investigation of the dense Kondo systemCeAgSb2

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Product

Resources

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Twofold enhancement of the hidden-order/large-moment antiferromagnetic phase boundary in the URu2−xFexSi
Kanchanavatee
¹
,
Janoschek
²
,
Baumbach
³

et al. 2011
Phys. Rev. B
47
13
77
1
View full text Add to dashboard Cite