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Polyamorphic transition of germanium under pressure

Emiliano Principi, Andrea Di Cicco, Frédéric Decremps, Alain Polian, Simone De Panfilis, and Adriano Filipponi
Phys. Rev. B 69, 201201(R) – Published 18 May 2004
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Abstract

Pressure-induced transformations in the atomic and electronic structure of amorphous germanium (aGe) have been investigated by using x-ray absorption spectroscopy (XAS) combined with energy-scanning x-ray diffraction. Our data show that an abrupt change in the local structure and in the electron states near the Fermi level occurs in evaporated aGe at a pressure of about 8 GPa. The transformation is clearly detectable by a change in the shape and energy shift in the near-edge structures and by an increase of the average first-neighbor distance measured by XAS. The occurrence of this polyamorphic transition is discussed in light of the recent advances in the study of multiple dense fluid phases.

  • Received 25 February 2004
  • Publisher error corrected 26 May 2004

DOI:https://doi.org/10.1103/PhysRevB.69.201201

©2004 American Physical Society

Corrections

26 May 2004

Erratum

Publisher's Note: Polyamorphic transition of germanium under pressure [Phys. Rev. B 69, 201201 (2004)]

Emiliano Principi, Andrea Di Cicco, Frédéric Decremps, Alain Polian, Simone De Panfilis, and Adriano Filipponi
Phys. Rev. B 69, 249902 (2004)

Authors & Affiliations

Emiliano Principi*

  • INFM, Università di Camerino, Dipartimento di Fisica, via Madonna delle Carceri, 62032 Camerino (MC), Italy

Andrea Di Cicco

  • INFM and INFN-LNF, Università di Camerino, Dipartimento di Fisica, via Madonna delle Carceri, 62032 Camerino (MC), Italy

Frédéric Decremps and Alain Polian

  • Physique des Milieux Condensés, CNRS, UMR 7602, Université Pierre et Marie Curie B 77, 4 place Jussieu, F-75252 Paris Cedex 05, France

Simone De Panfilis

  • ESRF, B.P. 220, 38043 Grenoble Cedex, France

Adriano Filipponi

  • INFM, Università dell’Aquila, Dipartimento di Fisica, via Vetoio 67010 Coppito, L’Aquila, Italy

  • *Electronic address: emiliano.principi@unicam.it; URL: http://gnxas.unicam.it/∼principi/

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Issue

Vol. 69, Iss. 20 — 15 May 2004

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