Enhancement of the superconducting transition temperature of MgB2 by a strain-induced bond-stretching mode softening

A. V. Pogrebnyakov; J. M. Redwing; S. Raghavan; V. Vaithyanathan; D. G. Schlom; S. Y. Xu; Qi Li; D. A. Tenne; A. Soukiassian; X. X. Xi; M. D. Johannes; D. Kasinathan; W. E. Pickett; J. S. Wu; J. C.H. Spence

doi:10.1103/PhysRevLett.93.147006

Enhancement of the superconducting transition temperature of MgB₂ by a strain-induced bond-stretching mode softening

A. V. Pogrebnyakov
, J. M. Redwing
, S. Raghavan
, V. Vaithyanathan
, D. G. Schlom
, S. Y. Xu
, Qi Li
, D. A. Tenne
, A. Soukiassian
, X. X. Xi
, M. D. Johannes
, D. Kasinathan
, W. E. Pickett
, J. S. Wu
, J. C.H. Spence

Physics Department

Research output: Contribution to journal › Article › peer-review

153 Scopus citations

Abstract

The increasing transition temperature (T_o) in MgB₂ films deposited by hybrid physical-chemical vapor deposition (HPCVD) was analyzed. Investigations show that the T_c increased due to the softening of bond-stretching E_2g phonon mode. The increased T _c was observed in the epitaxial films of SiC and sapphire substrates. The results show that the E_2g phonon softening was a possible avenue to achieve higher T_c in MgB₂-related material systems.

Original language	English
Article number	147006
Pages (from-to)	147006-1-147006-4
Journal	Physical Review Letters
Volume	93
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.93.147006
State	Published - 1 Oct 2004

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Pogrebnyakov, A. V., Redwing, J. M., Raghavan, S., Vaithyanathan, V., Schlom, D. G., Xu, S. Y., Li, Q., Tenne, D. A., Soukiassian, A., Xi, X. X., Johannes, M. D., Kasinathan, D., Pickett, W. E., Wu, J. S., & Spence, J. C. H. (2004). Enhancement of the superconducting transition temperature of MgB₂ by a strain-induced bond-stretching mode softening. Physical Review Letters, 93(14), 147006-1-147006-4. Article 147006. https://doi.org/10.1103/PhysRevLett.93.147006

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title = "Enhancement of the superconducting transition temperature of MgB2 by a strain-induced bond-stretching mode softening",

abstract = "The increasing transition temperature (To) in MgB2 films deposited by hybrid physical-chemical vapor deposition (HPCVD) was analyzed. Investigations show that the Tc increased due to the softening of bond-stretching E2g phonon mode. The increased T c was observed in the epitaxial films of SiC and sapphire substrates. The results show that the E2g phonon softening was a possible avenue to achieve higher Tc in MgB2-related material systems.",

author = "Pogrebnyakov, \{A. V.\} and Redwing, \{J. M.\} and S. Raghavan and V. Vaithyanathan and Schlom, \{D. G.\} and Xu, \{S. Y.\} and Qi Li and Tenne, \{D. A.\} and A. Soukiassian and Xi, \{X. X.\} and Johannes, \{M. D.\} and D. Kasinathan and Pickett, \{W. E.\} and Wu, \{J. S.\} and Spence, \{J. C.H.\}",

year = "2004",

month = oct,

day = "1",

doi = "10.1103/PhysRevLett.93.147006",

language = "English",

volume = "93",

pages = "147006--1--147006--4",

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Pogrebnyakov, AV, Redwing, JM, Raghavan, S, Vaithyanathan, V, Schlom, DG, Xu, SY, Li, Q, Tenne, DA, Soukiassian, A, Xi, XX, Johannes, MD, Kasinathan, D, Pickett, WE, Wu, JS & Spence, JCH 2004, 'Enhancement of the superconducting transition temperature of MgB₂ by a strain-induced bond-stretching mode softening', Physical Review Letters, vol. 93, no. 14, 147006, pp. 147006-1-147006-4. https://doi.org/10.1103/PhysRevLett.93.147006

TY - JOUR

T1 - Enhancement of the superconducting transition temperature of MgB2 by a strain-induced bond-stretching mode softening

AU - Pogrebnyakov, A. V.

AU - Redwing, J. M.

AU - Raghavan, S.

AU - Vaithyanathan, V.

AU - Schlom, D. G.

AU - Xu, S. Y.

AU - Li, Qi

AU - Tenne, D. A.

AU - Soukiassian, A.

AU - Xi, X. X.

AU - Johannes, M. D.

AU - Kasinathan, D.

AU - Pickett, W. E.

AU - Wu, J. S.

AU - Spence, J. C.H.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - The increasing transition temperature (To) in MgB2 films deposited by hybrid physical-chemical vapor deposition (HPCVD) was analyzed. Investigations show that the Tc increased due to the softening of bond-stretching E2g phonon mode. The increased T c was observed in the epitaxial films of SiC and sapphire substrates. The results show that the E2g phonon softening was a possible avenue to achieve higher Tc in MgB2-related material systems.

AB - The increasing transition temperature (To) in MgB2 films deposited by hybrid physical-chemical vapor deposition (HPCVD) was analyzed. Investigations show that the Tc increased due to the softening of bond-stretching E2g phonon mode. The increased T c was observed in the epitaxial films of SiC and sapphire substrates. The results show that the E2g phonon softening was a possible avenue to achieve higher Tc in MgB2-related material systems.

UR - https://www.scopus.com/pages/publications/20844454517

U2 - 10.1103/PhysRevLett.93.147006

DO - 10.1103/PhysRevLett.93.147006

M3 - Article

AN - SCOPUS:20844454517

SN - 0031-9007

VL - 93

SP - 147006-1-147006-4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 147006

ER -

Enhancement of the superconducting transition temperature of MgB₂ by a strain-induced bond-stretching mode softening

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