Rotor phases in compound semiconductors [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 16 pages : digital, PDF file
Additional Creators:: Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Quasi-elastic neutron scattering is used to study the disordering processes in two classes of semiconductor: I-IV Zintl compounds and the phosphorus-selenium system. Two alkali-metal-polyvalent metal Zintl compounds, CsPb and NaSn, exhibit a two-stage melting process with high-temperature solid phases characterized by rapid dynamical disorder. In CsPb this disorder is clearly associated with rapid reorientations of polyanions with the cations participating in the dynamical disorder on the same time scale. In NaSn the disorder is associated with fast reorientations of the polyanions closely coupled to a slower migration of the cations. The two high-temperature solid phases of the molecular crystal P₄Se₃ are confirmed to be rotor phases with small but significant differences in the reorientational motions in the two phases. Zintl compounds are formed from an electropositive metal A and an electronegative metal on semimetal M. Electron transfer from A to M, along with directional bonding between the M-ions, leads to chemical behavior in these ions characteristic of elements to the right of M in the periodic table.

Report Numbers:

E 1.99:anl/msd/cp--84837
E 1.99: conf-9410165--9
conf-9410165--9
anl/msd/cp--84837

Subject(s):

Materials Science

Other Subject(s):

Note:

Published through SciTech Connect.
11/01/1994.
"anl/msd/cp--84837"
" conf-9410165--9"
"DE95004139"
""
41. Yamada conference on neutron scattering,Sendai (Japan),11-14 Oct 1994.
Price, D.L.; Howells, W.S.; Saboungi, M.L.

Funding Information:

W-31109-ENG-38

View MARC record | catkey: 14457135