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Rogachev, G. V.; Goldberg, V. Z.; Kolata, J. J.; Chubarian, G.; Aleksandrov, D.; Фомичев, А. С.; Golovkov, M. S.; Oganessian, Yu. Ts.; Родин, А. М.; Skorodumov, B. B.; Slepnev, R. S.; Ter‐Akopian, G. M.; Trzaska, W. H.; Wolski, R.

doi:10.1103/physrevc.67.041603

Cited by 47 publications

(35 citation statements)

References 21 publications

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“…Figure 1 shows the level scheme obtained with the CSM calculation for He isotopes along with experimental data. Beyond good overall agreement, additional fine details can be noted that are in close relation to recent experimental data [11,12,13]. For 6 He the 2 + 1 state is well described by the sequential two-body decay into 4 He.…”

Section: Application To Weakly-bound Nucleisupporting

confidence: 82%

Many-Body Physics On The Border Of Nuclear Stability

Volya¹,

Zelevinsky²

2005

AIP Conference Proceedings

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A brief overview is given of the Continuum Shell Model, a novel approach that extends the traditional nuclear shell model into the domain of unstable nuclei and nuclear reactions. While some of the theoretical aspects, such as role and treatment of one-and two-nucleon continuum states, are discussed more in detail, a special emphasis is made on relation to observed nuclear properties, including definitions of the decay widths and their relation to the cross sections, especially in the cases of non-exponential decay. For the chain of He isotopes we demonstrate the agreement of theoretical results with recent experimental data. We show how the interplay of internal collectivity and coherent coupling to continuum gives rise to the universal mechanism of creating pigmy giant resonances.

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Section: Application To Weakly-bound Nucleisupporting

confidence: 82%

Many-Body Physics On The Border Of Nuclear Stability

Volya¹,

Zelevinsky²

2005

AIP Conference Proceedings

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“…For wires with smaller cross sectional area, fitting with the TAPS theory is not satisfactory and returns unreasonably high values of T c and ξ(0). This trend, observed also in short MoGe [31] and Nb [32] nanowires, possibly reflects a proximity to a zero-temperature quantum phase transition, where ξ(0) is expected to diverge. The deviation from the TAPS behavior could be due to an additional contribution from unbound quantum phase slips.…”

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confidence: 71%

Superconductor-Insulator Transition in Long MoGe Nanowires

2012

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The properties of one-dimensional superconducting wires depend on physical processes with different characteristic lengths. To identify the process dominant in the critical regime we have studied the transport properties of very narrow (9-20 nm) MoGe wires fabricated by advanced electron-beam lithography in a wide range of lengths, 1-25 μm. We observed that the wires undergo a superconductor-insulator transition (SIT) that is controlled by cross sectional area of a wire and possibly also by the width-to-thickness ratio. The mean-field critical temperature decreases exponentially with the inverse of the wire cross section. We observed that a qualitatively similar superconductor-insulator transition can be induced by an external magnetic field. Our results are not consistent with any currently known theory of the SIT. Some long superconducting MoGe nanowires can be identified as localized superconductors; namely, in these wires the one-electron localization length is much smaller than the length of a wire.

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“…Third, the onset of superconductivity is not affected by weak magnetic fields: nMR is observed only at the bottom part of the R(T ) transition. Perhaps we should also mention another effect -enhancement of the critical current by magnetic field -which was observed in MoGe and Nb nanowires [177] and attributed to interplay between spin-exchange scattering from residual magnetic impurities and the orbital and Zeeman effects [178]. However, it remains unclear if this effect is related to nMR in any way.…”

Section: Negative Magneotresistancementioning

confidence: 95%

Superconductivity in one dimension

2008

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Superconducting properties of metallic nanowires can be entirely different from those of bulk superconductors because of the dominating role played by thermal and quantum fluctuations of the order parameter. For superconducting wires with diameters below $ \sim 50$ nm quantum phase slippage is an important process which can yield a non-vanishing wire resistance down to very low temperatures. Further decrease of the wire diameter, for typical material parameters down to $\sim 10$ nm, results in proliferation of quantum phase slips causing a sharp crossover from superconducting to normal behavior even at T=0. A number of interesting phenomena associated both with quantum phase slips and with the parity effect occur in superconducting nanorings. We review recent theoretical and experimental activities in the field and demonstrate dramatic progress in understanding of the phenomenon of superconductivity in quasi-one-dimensional nanostructures.Comment: 62 pages, 47 figures Misprints corrected, several equations are adapted to the experimentally relevant diffusive limi

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T=5/2states in9Li:Isobaric analog states of

Cited by 47 publications

References 21 publications

Many-Body Physics On The Border Of Nuclear Stability

Many-Body Physics On The Border Of Nuclear Stability

Superconductor-Insulator Transition in Long MoGe Nanowires

Superconductivity in one dimension

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