Observation of coherent higher frequency A 1 _g phonons in Bi _2Se _3 using femtosecond time-resolved reflection measurement

Nakamura K.G.; Hu J.; Norimatsu K.Goto A.Igarashi K.Sasagawa T.

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Observation of coherent higher frequency A 1 _g phonons in Bi _2Se _3 using femtosecond time-resolved reflection measurement

机译：Observation of coherent higher frequency A 1 _g phonons in Bi _2Se _3 using femtosecond time-resolved reflection measurement

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The dynamics of phonons in a Bi _2Se _3 crystal has been studied by using femtosecond time-resolved reflection measurements. Two coherent optical phonons with A _(1g) ~1 and A _(1g) ~1modes are observed at 2.14 and 5.09 THz at room temperature, respectively. The initial amplitude of the generated coherent A _(1g) ~1phonons is higher than that of the A _(1g) ~1 phonons, but those are quickly damped with a rate of 1.28 THz.

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《Solid State Communications》 |2012年第10期|902-904|共3页
作者
Nakamura K.G.; Hu J.; Norimatsu K.Goto A.Igarashi K.Sasagawa T.;
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Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan;

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正文语种英语
中图分类固体物理学;
关键词
A. Thermoelectric materials; A. Topological insulators; D. Coherent phonons; E. Transient reflectivity;

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Observation of coherent higher frequency A 1 _g phonons in Bi _2Se _3 using femtosecond time-resolved reflection measurement

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