Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry

P. Bordet; M. Mezouar; M. Núñez-Regueiro; M. Monteverde; M. D. Núñez-Regueiro; N. Rogado; K. A. Regan; M. A. Hayward; T. He; S. M. Loureiro; R. J. Cava

doi:10.1103/PhysRevB.64.172502

Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry

P. Bordet, M. Mezouar, M. Núñez-Regueiro, M. Monteverde, M. D. Núñez-Regueiro, N. Rogado, K. A. Regan, M. A. Hayward, T. He, S. M. Loureiro, R. J. Cava

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3 Scopus citations

Abstract

We report measurements on (formula presented) up to (formula presented) Increasing pressure yields a monotonous decrease of the lattice parameters and of the (formula presented) ratio, but no structural transition down to parameters smaller than those of (formula presented) The transition superconducting temperature also decreases with temperature in a sample-dependent way. The results are explained by an increase of the filling of the two-dimensional (formula presented) bands with pressure, the Mg stoichiometry determining the starting position of the Fermi level. Our measurements indicate that these hole bands are the relevant ones for superconductivity.

Original language	English (US)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.64.172502
State	Published - 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Bordet, P., Mezouar, M., Núñez-Regueiro, M., Monteverde, M., Núñez-Regueiro, M. D., Rogado, N., Regan, K. A., Hayward, M. A., He, T., Loureiro, S. M., & Cava, R. J. (2001). Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry. Physical Review B - Condensed Matter and Materials Physics, 64(17). https://doi.org/10.1103/PhysRevB.64.172502

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title = "Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry",

abstract = "We report measurements on (formula presented) up to (formula presented) Increasing pressure yields a monotonous decrease of the lattice parameters and of the (formula presented) ratio, but no structural transition down to parameters smaller than those of (formula presented) The transition superconducting temperature also decreases with temperature in a sample-dependent way. The results are explained by an increase of the filling of the two-dimensional (formula presented) bands with pressure, the Mg stoichiometry determining the starting position of the Fermi level. Our measurements indicate that these hole bands are the relevant ones for superconductivity.",

author = "P. Bordet and M. Mezouar and M. N{\'u}{\~n}ez-Regueiro and M. Monteverde and N{\'u}{\~n}ez-Regueiro, {M. D.} and N. Rogado and Regan, {K. A.} and Hayward, {M. A.} and T. He and Loureiro, {S. M.} and Cava, {R. J.}",

year = "2001",

doi = "10.1103/PhysRevB.64.172502",

language = "English (US)",

volume = "64",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

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Bordet, P, Mezouar, M, Núñez-Regueiro, M, Monteverde, M, Núñez-Regueiro, MD, Rogado, N, Regan, KA, Hayward, MA, He, T, Loureiro, SM & Cava, RJ 2001, 'Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry', Physical Review B - Condensed Matter and Materials Physics, vol. 64, no. 17. https://doi.org/10.1103/PhysRevB.64.172502

TY - JOUR

T1 - Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry

AU - Bordet, P.

AU - Mezouar, M.

AU - Núñez-Regueiro, M.

AU - Monteverde, M.

AU - Núñez-Regueiro, M. D.

AU - Rogado, N.

AU - Regan, K. A.

AU - Hayward, M. A.

AU - He, T.

AU - Loureiro, S. M.

AU - Cava, R. J.

PY - 2001

Y1 - 2001

N2 - We report measurements on (formula presented) up to (formula presented) Increasing pressure yields a monotonous decrease of the lattice parameters and of the (formula presented) ratio, but no structural transition down to parameters smaller than those of (formula presented) The transition superconducting temperature also decreases with temperature in a sample-dependent way. The results are explained by an increase of the filling of the two-dimensional (formula presented) bands with pressure, the Mg stoichiometry determining the starting position of the Fermi level. Our measurements indicate that these hole bands are the relevant ones for superconductivity.

AB - We report measurements on (formula presented) up to (formula presented) Increasing pressure yields a monotonous decrease of the lattice parameters and of the (formula presented) ratio, but no structural transition down to parameters smaller than those of (formula presented) The transition superconducting temperature also decreases with temperature in a sample-dependent way. The results are explained by an increase of the filling of the two-dimensional (formula presented) bands with pressure, the Mg stoichiometry determining the starting position of the Fermi level. Our measurements indicate that these hole bands are the relevant ones for superconductivity.

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U2 - 10.1103/PhysRevB.64.172502

DO - 10.1103/PhysRevB.64.172502

M3 - Article

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SN - 1098-0121

VL - 64

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 17

ER -

Absence of a structural transition up to 40 GPa in (formula presented) and the relevance of magnesium nonstoichiometry

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All Science Journal Classification (ASJC) codes

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