The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals

Moriya, Tôru

doi:10.1143/jpsj.18.516

Cited by 738 publications

(401 citation statements)

References 6 publications

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“…By comparing our data to the enhanced Korringa factor K(α) versus interaction parameter α calculated from Ref. [18] [see Fig. 4], we are able to determine the interaction parameter α.…”

Section: Resultsmentioning

confidence: 95%

“…The nuclear spin lattice relaxation rate is a measure of the perpendicular fluctuating magnetic field δH ⊥ given by 1/T 1 = ( γ 2 2 ) +∞ −∞ dt exp (iωt) δH ⊥ (t)δH ⊥ (0) . In metals with strictly non-interacting electron gas, the relaxation rate is proportional to the temperature and square of the Knight shift [18], known as the Korringa relation:…”

Section: Resultsmentioning

confidence: 99%

“…Moriya modified the Korringa relation by incorporating the factor K(α) that includes the effect of a δ-function-potential electron-electron interaction [18]:…”

Section: Resultsmentioning

confidence: 99%

“…Here α = 3vn 2ε F and G(x) = ( 1 2 )[1 + 1−x 2 2x log | 1+x 1−x |] from the free electron approximation with x = q 2k F wherev is a constant, n is the number of electrons, q is the wavevector, and ε F , k F are the Fermi energy and wave number, respectively [18]. The value of K(α) ranges from 0 to 1.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)

Lumata¹,

Choi²,

Brooks³

et al. 2010

J. Phys.: Condens. Matter

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Abstract. We report 77 Se and 63 Cu nuclear magnetic resonance (NMR) investigation on the charge-density-wave (CDW) superconductor Cu x TiSe 2 (x = 0.05 and 0.07). At high magnetic fields where superconductivity is suppressed, the temperature dependence of 77 Se and 63 Cu spin-lattice relaxation rates 1/T 1 follow a linear relation. The slope of 77 1/T 1 vs T increases with the Cu doping. This can be described by a modified Korringa relation which suggests the significance of electronic correlations and the Se 4p-and Ti 3d -band contribution to the density of states at the Fermi level in the studied compounds.

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“…By comparing our data to the enhanced Korringa factor K(α) versus interaction parameter α calculated from Ref. [18] [see Fig. 4], we are able to determine the interaction parameter α.…”

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

“…Moriya modified the Korringa relation by incorporating the factor K(α) that includes the effect of a δ-function-potential electron-electron interaction [18]:…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)

Lumata¹,

Choi²,

Brooks³

et al. 2010

J. Phys.: Condens. Matter

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“…1/ 23 T 1 largely decreases with duration from BLH1 to BLH2 and then BLHs2. The local field fluctuations probed by 1/ 23 T 1 [29,30] are sensitive to the duration effect. Fig.…”

Section: A-type Spin Fluctuations Via 23 Na Nmrmentioning

confidence: 99%

59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2 · yH2O

Itoh

Ohta

Michioka

et al.

Advances in Solid State Physics

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Abstract. We present our NMR studies of double-layer hydrated cobalt oxides NaxCoO2 · yH2O (x ≈0.35, y ≈1.3) with various Tc = 0 − 4.8 K and magnetic transition temperatures. High-resolution 1 H NMR spectrum served as an evidence for the existence of H3O + oxonium ions. 23 Na nuclear spin-lattice relaxation rates served to detect local field fluctuations sensitive to Tc. 59 Co nuclear quadrupole resonance (NQR) spectra served to classify the various Tc samples. From the classification by 59 Co NQR frequency, the double-layer hydrated compounds were found to have two superconducting phases closely located to a magnetic phase. In the normal state and at a magnetic field in the ab-plane, two 59 Co NMR signals with different Knight shifts and different 59 Co nuclear spin-lattice relaxation times 59 T1 were observed. The two 59 Co NMR signals suggest magnetic disproportionation of two Co sites or inplane (XY) anisotropy of a single Co site. Non Korringa behavior and power law behavior in zero-field NQR 1/ 59 T1 above and below Tc suggest non-Fermi liquid and unconventional superconductivity.

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High Temperature Superconductors

Barrett

Slichter

2007

Encyclopedia of Magnetic Resonance

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The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals

Cited by 738 publications

References 6 publications

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)

59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2 · yH2O

High Temperature Superconductors

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The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals

Cited by 738 publications

References 6 publications

77Se and63Cu NMR studies of the electronic correlations in CuxTiSe2(x= 0.05, 0.07)

77Se and63Cu NMR studies of the electronic correlations in CuxTiSe2(x= 0.05, 0.07)

59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2 · yH2O

High Temperature Superconductors

Contact Info

Product

Resources

About

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)

⁷⁷Se and⁶³Cu NMR studies of the electronic correlations in Cu_xTiSe₂(x= 0.05, 0.07)