title: Zero thermal expansion in a nanostructured inorganic-organic hybrid crystal.
abstract: There are very few materials that exhibit zero thermal expansion (ZTE), and of these even fewer are appropriate for electronic and optoelectronic applications. We find that a multifunctional crystalline hybrid inorganic-organic semiconductor, beta-ZnTe(en)(0.5) (en denotes ethylenediamine), shows uniaxial ZTE in a very broad temperature range of 4-400 K, and concurrently possesses superior electronic and optical properties. The ZTE behavior is a result of compensation of contraction and expansion of different segments along the inorganic-organic stacking axis. This work suggests an alternative route to designing materials in a nanoscopic scale with ZTE or any desired positive or negative thermal expansion (PTE or NTE), which is supported by preliminary data for ZnTe(pda)(0.5) (pda denotes 1,3-propanediamine) with a larger molecule.
authors.affiliation: National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401, USA. yong_zhang@nrel.gov
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
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authors.lastname: Islam
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authors.lastname: Ren
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authors.lastname: Parilla
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authors.lastname: Ahrenkiel
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authors.lastname: Lee
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authors.lastname: Mascarenhas
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authors.initials: MJ
authors.lastname: McNevin
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authors.lastname: Naumov
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authors.lastname: Fu
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authors.lastname: Huang
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authors.lastname: Li