Hard x-ray photoelectron spectroscopy study of Ge{sub 2}Sb{sub 2}Te{sub 5}; as-deposited amorphous, crystalline, and laser-reamorphized

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865328· OSTI ID:22283296

Tominaga, Junji ^[1]; Fons, Paul; Kolobov, Alex V. ^[1]; Ueda, Shigenori; Yoshikawa, Hideki; Yamashita, Yoshiyuki ^[2]; Ishimaru, Satoshi ^[3]; Kobayashi, Keisuke ^[4]

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1. Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, 305-8562 Ibaraki (Japan)
2. Synchrotron x-ray Station at SPring-8, National Institute for Materials Science, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
3. SPring-8 Service Co. Ltd., 1-1-1 Kouto, Sayo, Hyogo 679-5148 (Japan)
4. Hiroshima Synchrotron Radiation Center, Hiroshima University Kagamiyama 2-313, Higashi-Hiroshima, Hiroshima 739-0046 (Japan)

We have investigated the electronic structure of as-deposited, crystalline, and laser-reamorphized Ge{sub 2}Sb{sub 2}Te{sub 5} using high resolution, hard x-ray photoemission spectroscopy. A shift in the Fermi level as well as a broadening of the spectral features in the valence band and the Ge 3d level between the amorphous and crystalline state is observed. Upon amorphization, Ge 3d and Sb 4d spectra show a surprisingly small breaking of resonant bonds and changes in the bonding character as evidenced by the very similar density of states in all cases.

• OSTI ID: 22283296
• Journal Information: Applied Physics Letters, Vol. 104, Issue 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
ANTIMONIDES
CRYSTALS
ELECTRONIC STRUCTURE
EMISSION SPECTRA
ENERGY-LEVEL DENSITY
FERMI LEVEL
GERMANIUM TELLURIDES
HARD X RADIATION
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
VALENCE