Nuclear Relaxation in Superconducting Aluminum

Hebel, L. C.; Slichter, Charles P.

doi:10.1103/physrev.107.901

Cited by 141 publications

(66 citation statements)

References 6 publications

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“…It is necessary to note that in the first works on NMR in superconductors long nuclear relaxation time allowed to overcome the main difficulty for the observation of the resonance caused by the Meissner effect using the method of cycling of dc magnetic field 2,4 . Formation of nonequilibrium response of the nuclear spin system was performed in the superconducting state and the resonance signal was observed in the normal state.…”

Section: Introductionmentioning

confidence: 99%

EPR Study of Superconductors

Гарифуллин

2014

J Low Temp Phys

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Historical review on the studies of the electron paramagnetic resonance in superconductors performed in the period from 1970 to 1990 at the Kazan Physical Technical Institute of the Russian Academy of Sciences (group of Dr. E. G. Kharakhash'yan) in collaboration with Kazan State University (group of Prof. B. I. Kochelaev) and with the Institute for Physical Problems of Russian Academy of Sciences (group of Prof. N. E. Alekseevskii) is presented. We have observed for first time electron paramagnetic resonance of impurities in a type II superconductor; found indication for a long-range exchange interaction between magnetic impurities arising due to the superconducting correlations; observed the magnetic ordering of impurities in the superconducting state; and, finally, we found one of the first evidences for heterogeneity of the 1:2:3 high-Tc superconductor which is its natural property

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Section: Introductionmentioning

confidence: 99%

EPR Study of Superconductors

Гарифуллин

2014

J Low Temp Phys

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“…The analog feature in nuclear magnetic resonance, i.e. the presence of a maximum in the nuclear-spin relaxation-rate of aluminum below T c , 7 was one of the crucial experiments for the quick success of the BCS theory. By now, this Hebel-Slichter peak has been found in a large number of superconductors.…”

Section: Introductionmentioning

confidence: 99%

Quasiparticle response of superconducting aluminum to electromagnetic radiation

2008

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The response of superconducting aluminum to electromagnetic radiation is investigated in a broad frequency (45 MHz to 40 GHz) and temperature range (T > Tc/2), by measuring the complex conductivity. While the imaginary part probes the superfluid density (Cooper-pairs), the real part monitors the opening of the superconducting energy gap and -most important here -the zerofrequency quasi-particle response. Here we observe the full temperature and frequency dependence of the coherence peak. Varying the mean free path gives insight into the dynamics, scattering and coherence effects of the quasi-particles in the superconducting state.

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“…Over the last few decades nuclear resonance [1] and neutron scattering measurements [2,3] have provided convincing evidence for this suppression, thereby validating one of the key features of the BCS wavefunction: the electron spins are hidden because they belong to singlet pairs [4]. Of course, once the pair binding energy is exceeded, the bare electron spins should become visible again.…”

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confidence: 99%

New Magnetic Coherence Effect in SuperconductingLa2−xSrxCuO
Mason
¹
,
Schröder²,
Aeppli³
et al. 1996
Phys. Rev. Lett.
101
8
70
1
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We have used inelastic neutron scattering to examine the magnetic fluctuations at intermediate frequencies in the simplest high temperature superconductor, La 2−x Sr x CuO 4 . The suppression of the low energy magnetic response in the superconducting state is accompanied by an increase in the response at higher energies. Just above a threshold energy of ∼ 7 meV there is additional scattering present below T c which is characterised by an extraordinarily long coherence length, in excess of 50Å.

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Nuclear Relaxation in Superconducting Aluminum

Cited by 141 publications

References 6 publications

EPR Study of Superconductors

EPR Study of Superconductors

Quasiparticle response of superconducting aluminum to electromagnetic radiation

New Magnetic Coherence Effect in SuperconductingLa2−xSrxCuO
Mason
¹
,
Schröder²,
Aeppli³
et al. 1996
Phys. Rev. Lett.
101
8
70
1
View full text Add to dashboard Cite

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Nuclear Relaxation in Superconducting Aluminum

Cited by 141 publications

References 6 publications

EPR Study of Superconductors

EPR Study of Superconductors

Quasiparticle response of superconducting aluminum to electromagnetic radiation

New Magnetic Coherence Effect in SuperconductingLa2−xSrxCuOMason1, Schröder2, Aeppli3 et al. 1996Phys. Rev. Lett.1018701View full textAdd to dashboardCite

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New Magnetic Coherence Effect in SuperconductingLa2−xSrxCuO
Mason
¹
,
Schröder²,
Aeppli³
et al. 1996
Phys. Rev. Lett.
101
8
70
1
View full text Add to dashboard Cite