Superconductivity in irradiated A-15 compounds at low fluences II. Alpha-particle-irradiated Nb3Sn and Nb3Ge

Wiesmann, H. J.; Gurvitch, M.; Ghosh, A.; Lutz, H. D.; Jones, Keith; Goland, A.N.; Strongin, Myron

doi:10.1007/bf00114965

Cited by 21 publications

(9 citation statements)

References 16 publications

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“…Then it becomes negative for resistivities above 150 mW cm. We stress that this behavior is consistent with the above superconducting properties: correlation of T c and the residual resistivity [11][12][13], universal correlation of T c and the resistance ratio [14][15][16], and loss of the thermal electrical resistivity [17] with decreasing T c .…”

Section: Introductionsupporting

confidence: 70%

“…There is already compelling evidence that this is the case. as shown by Testardi's universal correlation of T c and the resistance ratio [11][12][13][14][15][16][17]. Recently, Elliot et al [78] studied the conductance and superconducting transition temperature of Mo/Si multilayers as a function of the metal layer thickness, from 7 A to 85 A.…”

Section: Discussionmentioning

confidence: 95%

“…In fact, there are overwhelming numbers of experiments which support this idea [4]. For instance, tunneling [6][7][8], specific heat [9], X-ray photoemission spectroscopy (XPS) [10], correlation of T c and the residual resistivity [11][12][13], universal correlation of T c and the resistance ratio [14][15][16], and loss of the thermal electrical resistivity [17] with decreasing T c clearly show a decrease of the electron-phonon interaction accompanying the decrease of T c with disorder. It is then anticipated that the electron-phonon interaction in the normal state of metals will also be influenced strongly by weak localization.…”

Section: Introductionmentioning

confidence: 84%

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Weak localization and the Mooij rule in disordered metals

Park

Savran

Kim

2003

Physica Status Solidi (b)

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Weak localization leads to the same correction to both the conductivity and the McMillan's electron-phonon coupling constant λ (and λtr, transport electron-phonon coupling constant). Consequently the temperature dependence of the thermal electrical resistivity is decreasing as the conductivity is decreasing due to weak localization, which results in the decrease of the temperature coefficient of resistivity (TCR) with increasing the residual resistivity. When λ and λtr are approaching zero, only the residual resistivity part remains and it gives rise to the negative TCR. Accordingly, the Mooij rule is a manifestation of weak localization correction to the conductivity and the electron-phonon interaction. This understanding provides a new means of probing the phonon-mechanism in exotic superconductors and an opportunity of fabricating new novel devices

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Section: Introductionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 84%

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Weak localization and the Mooij rule in disordered metals

Park

Savran

Kim

2003

Physica Status Solidi (b)

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“…The relative increase of the low-T c disordered regions with increased radiation dose would also lead to a broadening of the transition with fluence as is observed for fluence > 10 17 cm -2 . Resistive transition broadening is a common feature of irradiated superconductors like Nb 3 Sn whose T c is sensitive to the disorder of the crystal lattice [6]. …”

Section: Resultsmentioning

confidence: 99%

Effect of proton irradiation on the critical current and critical temperature of Bi-2212 wires

Ghosh¹,

Greene²

2012

AIP Conference Proceedings

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“…So far, several theoretical models have been proposed to explain the resistivity saturation phenomenon. Some have employed semi‐classical approaches consistent with Boltzman theory such as Fermi smearing , T ‐dependent energy bands and anharmonicity models. Semi‐classical models such as Debye–Waller effects , phonon drag and ineffectiveness and non‐classical conduction channels have attempted to explain resistivity saturation.…”

Section: Introductionmentioning

confidence: 99%

Pressure‐induced electrical resistivity saturation of Fe17Si

Kiarasi

Secco

2015

Physica Status Solidi (b)

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A large body of work has focused on resistivity saturation in systems where scattering is caused by impurities or by thermal effects. Electrical resistivity saturation is here classified as either static, where impurity scattering causes saturation, or dynamic, where changing external parameters such as temperature or pressure cause saturation. Resistivity measurements up to 5 GPa show pressure-induced resistivity saturation in Fe17wt%Si by the change in sign from positive to negative of the temperature coefficient of resistivity. The pressure dependence of the Curie temperature is 10.2(8) K GPa À1 . The Debye temperature is calculated from the Bloch-Gr€ uneisen equation and yields a pressure dependence of 40 (9) 1 Introduction For many highly disordered metallic systems, specifically d-band alloys near room temperature, experimental observations have shown a negative correlation between the values of electrical resistivity (r) and temperature coefficient of electrical resistivity, TCR [1]. The TCR changes sign from positive to negative in a universal range of 150-200 mV cm. This change in sign of TCR corresponds to saturation of electrical resistivity and can be related to impurity scattering. This behaviour is evident for bulk alloys, thin films and amorphous alloys. Tsuei [2] challenged Mooij's universal range of electrical resistivity saturation and with support of additional experimental observations, he proposed a revised saturation range of 30-400 mV cm. On the other hand, temperature studies on A15 superconductors as well as on transition metal compounds such as iron alloys [3][4][5][6] reported nonlinearity in r(T) and the breakdown of Matthiessen's rule. The growth of r(T) close to room temperature is much faster than expected from Boltzman theory, and at some point it grows much slower than suggested by the Bloch-Gr€ uneisen formula and seems bounded by a value of r max $150 mΩ cm, which was also termed resistivity saturation [4].Seemingly different types of resistivity saturations (impurity induced and temperature induced) described above are suggested to originate from a common source which is based on the Ioffe-Regel criterion [7]. Resistivity

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Superconductivity in irradiated A-15 compounds at low fluences II. Alpha-particle-irradiated Nb3Sn and Nb3Ge

Cited by 21 publications

References 16 publications

Weak localization and the Mooij rule in disordered metals

Weak localization and the Mooij rule in disordered metals

Effect of proton irradiation on the critical current and critical temperature of Bi-2212 wires

Pressure‐induced electrical resistivity saturation of Fe17Si

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