Interplay between lattice dynamics and superconductivity in Nb3Sn thin films

被引：7

作者：

Couet, S. ^{[1
]}

Peelaers, H. ^{[2
,3
]}

Trekels, M. ^{[1
]}

Houben, K. ^{[4
]}

Hu, M. Y. ^{[5
]}

Zhao, J. Y. ^{[5
]}

Bi, W. ^{[5
,6
]}

Alp, E. E. ^{[5
]}

Menendez, E. ^{[1
]}

Partoens, B. ^{[3
]}

Peeters, F. M. ^{[3
]}

Van Bael, M. J. ^{[4
]}

Vantomme, A. ^{[1
]}

Temst, K. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Inst Kern & Stralingsfys, Celestijnenlaan 200D, B-3001 Louvain, Belgium

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[3] Univ Antwerp, Dept Fys, B-2020 Antwerp, Belgium

[4] Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium

[5] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[6] Univ Illinois, Dept Geol, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 04期

关键词：

TEMPERATURE; SCATTERING; PHONONS;

D O I：

10.1103/PhysRevB.88.045437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the link between superconductivity and atomic vibrations in Nb3Sn films with a thickness ranging from 10 to 50 nm. The challenge of measuring the phonon density of states (PDOS) of these films has been tackled by employing the technique of nuclear inelastic scattering by Sn-119 isotopes to reveal the Sn-partial phonon density of states. With the support of ab initio calculations, we evaluate the effect of reduced film thickness on the PDOS. This approach allows us to estimate the changes in superconducting critical temperature T-c induced by phonon confinement, which turned out to be limited to a few tenths of K. The presented method is successful for the Nb3Sn system and paves the way for more systematic studies of the role of phonon confinement in Sn-containing superconductors.

引用

页数：7

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