origin of coherent phonons in bi2te3 excited by ultrafast laser pulses

... REVIEW B 88, 064307 (2013) Origin of coherent phonons in Bi2Te3 excited by ultrafast laser pulses Yaguo Wang,*,†Liang Guo,†and Xianfan Xu‡School of Mechanical Engineering and Birck Nanotechnology ... and employ theFIG. 2. Coherent phonons excited by femtosecond laser pulses (dots) in the 1-μm-thick Bi2Te3film and the fitting result (solid line).TABLE I. Comparison of phonon frequencies ... widths of the Raman peaks in the thinner films are slightly wider,indicating longer interatomic distances or larger tensile stressand stronger anharmonicity in thinner films. The band gap in 064307-4ORIGIN...

origin of coherent phonons in bi2te3 excited by ultrafast laser pulses

coupling of ultrafast laser energy to coherent phonons in bismuth

... Coupling of ultrafast laser energy to coherent phonons in bismuthAlexander Q. Wu and Xianfan Xua͒School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907͑Received ... 2007; published online 21 June 2007͒Energy coupling to coherent phonons in Bi during femtosecond laser bismuth interaction isinvestigated using a double-pulse femtosecond pulse train generated from ... the increase of bismuth temperature is dependent on the separation time between thetwo laser pulses. Using a numerical ﬁtting, which considers the effect of convolution between theincident pulses...

An error analysis of using reference in written english by secondary school studend = phân tích lỗi của học sinh THPT tong việc sử dụng phép quy chiếu trong tiếng anh viết

... are mother tongue interference (interlingual errors), intralingual errors, poor language knowledge and other. Among them, intralingual errors are the main cause of errors in using English reference ... classified into two main types: interlingual and intralingual errors. Intralingual errors are traced to four major causes: over-generalization, incomplete application of rules, ignorance of rule ... errors in using reference, it is seen that the causes of errors in using three types of reference are devired from mother tongue interference, over-generalization, incomplete application of rules...

DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf

... in µg/L in the waterx sampleA = integrated abundance of the quantitation ion of the analytex in the sampleA = integrated abundance of the quantitation ion of the internalis standard in ... and initial calibration atthe beginning of each 12-hour work shift during which analyses are performedusing the following procedure.10.3.1 Inject a 1 µL aliquot of the 5 ng/µL solution of DFTPP, ... portion of the sample into the solvent reservoir. The water sample will drain into the cartridge, and from the exit into thesuction flask. Maintain the packing material in the cartridge immersed in water...

Báo cáo khoa học: Translation initiation region dependency of translation initiation in Escherichia coli by IF1 and kasugamycin pdf

... proteins arepresent in all three domains of life (IF1 in bacteria,aIF1A in archeaons, and eIF1A in eukaryotes) [4,5].IF1 is the smallest of the three initiation factors in E. coli. During initiation ... fMet-tRNA binding to the P-site[10,12,13], probably by stabilizing IF2 binding to the30S subunit [14], and stimulates the GTPase activity of IF2 [15]. It also increases binding of mRNA to the ini-tiation ... volumes of overnight cultures were inocu-lated into 3 mL of fresh LB. Cells were grown with intensiveshaking to a D590 nm of 0.6, and then diluted in LB to obtaina D590 nm of 0.05 in the...

holmes, lumley, et al. low-dimensional models of coherent structures in turbulence

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controlling phase change through ultrafast excitation of coherent phonons

... materials damage was investigated in this work. The damaged areas produced by 5,000 pulses were measured. Using 5,000 pulses instead of single pulse allows determination of the damage areas ... excitation can be caused by the differences in the fluences of the individual pulses - the fluences of the individual pulses in the two-pulse pulse train are higher. In addition, the four-pulse ... decay of coherent optical phonons in femtosecond -laser -excited bismuth,” Phys. Rev. B 78(13), 134302 (2008). 5. E. S. Zijlstra, L. L. Tatarinova, and M. E. Garcia, Laser- induced phonon-phonon interactions...

reduction of coherent phonon lifetime in bi2te3 sb2te3 superlattices

... adisplacive excitation of coherent phonon process,3whichwas shown to be a special case of impulsive stimulated Ra-man scattering.4,5 In this study, we investigated coherent phonons in V2VI3compounds ... the initial electron excitation ͑the initialreﬂectivity drop͒ for all samples, including the superlatticeare close at the same laser ﬂuence, indicating that the laser energies absorbed by the ... frominterface scattering of phonons 9,10as well as otherprocesses.7Even so, there has been no documented evidence of reduction in phonon lifetimes, coherent or otherwise, thatwould begin...

reduction of coherent phonon lifetime in bi2te3 sb2te3 superlattices

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