Quasielastic Neutron Scattering of Liquid Te50Se50 in the Semiconductor-to-Metal Transition Range

Ayano Chiba; Yoshinori Ohmasa; Makoto Yao; Oleg Petrenko; Yukinobu Kawakita

doi:10.1143/JPSJ.71.504

Quasielastic Neutron Scattering of Liquid Te₅₀Se₅₀ in the Semiconductor-to-Metal Transition Range

Ayano Chiba, Yoshinori Ohmasa, Makoto Yao, Oleg Petrenko, Yukinobu Kawakita

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We have carried out neutron scattering experiments for liquid Te ₅₀Se₅₀ at 700K (semiconducting regime), 900K (transition regime) and 1100K (metallic regime). The quasielastic scattering peak is comparatively narrow at the peak positions of S(Q). A remarkable increase in the peak width is observed near the first minimum of S(Q), when the semiconductor-to-metal transition occurs. Since the first peak of S(Q) in this system proves to mainly reflect the inter-chain correlation and the second peak to the intra-chain correlation, the observed broadening may suggest frequent bond-switching between the chains in the metallic regime.

Original language	English
Pages (from-to)	504-508
Number of pages	5
Journal	Journal of the Physical Society of Japan
Volume	71
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.71.504
Publication status	Published - 2002 Feb
Externally published	Yes

Keywords

Dynamic structure
Interchain correlation
Liquid
Neutron scattering
Selenium
Semiconductor-to-metal transition
Tellurium

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Quasielastic Neutron Scattering of Liquid Te50Se50 in the Semiconductor-to-Metal Transition Range",

abstract = "We have carried out neutron scattering experiments for liquid Te 50Se50 at 700K (semiconducting regime), 900K (transition regime) and 1100K (metallic regime). The quasielastic scattering peak is comparatively narrow at the peak positions of S(Q). A remarkable increase in the peak width is observed near the first minimum of S(Q), when the semiconductor-to-metal transition occurs. Since the first peak of S(Q) in this system proves to mainly reflect the inter-chain correlation and the second peak to the intra-chain correlation, the observed broadening may suggest frequent bond-switching between the chains in the metallic regime.",

keywords = "Dynamic structure, Interchain correlation, Liquid, Neutron scattering, Selenium, Semiconductor-to-metal transition, Tellurium",

author = "Ayano Chiba and Yoshinori Ohmasa and Makoto Yao and Oleg Petrenko and Yukinobu Kawakita",

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T1 - Quasielastic Neutron Scattering of Liquid Te50Se50 in the Semiconductor-to-Metal Transition Range

AU - Chiba, Ayano

AU - Ohmasa, Yoshinori

AU - Yao, Makoto

AU - Petrenko, Oleg

AU - Kawakita, Yukinobu

PY - 2002/2

Y1 - 2002/2

N2 - We have carried out neutron scattering experiments for liquid Te 50Se50 at 700K (semiconducting regime), 900K (transition regime) and 1100K (metallic regime). The quasielastic scattering peak is comparatively narrow at the peak positions of S(Q). A remarkable increase in the peak width is observed near the first minimum of S(Q), when the semiconductor-to-metal transition occurs. Since the first peak of S(Q) in this system proves to mainly reflect the inter-chain correlation and the second peak to the intra-chain correlation, the observed broadening may suggest frequent bond-switching between the chains in the metallic regime.

AB - We have carried out neutron scattering experiments for liquid Te 50Se50 at 700K (semiconducting regime), 900K (transition regime) and 1100K (metallic regime). The quasielastic scattering peak is comparatively narrow at the peak positions of S(Q). A remarkable increase in the peak width is observed near the first minimum of S(Q), when the semiconductor-to-metal transition occurs. Since the first peak of S(Q) in this system proves to mainly reflect the inter-chain correlation and the second peak to the intra-chain correlation, the observed broadening may suggest frequent bond-switching between the chains in the metallic regime.

KW - Dynamic structure

KW - Interchain correlation

KW - Liquid

KW - Neutron scattering

KW - Selenium

KW - Semiconductor-to-metal transition

KW - Tellurium

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