Abstract
Coherent, totally symmetric large-amplitude phonons in bismuth and antimony were investigated by the pump—probe method using femtosecond laser pulses. The obtained results are compared to time-resolved Raman data. It is shown that intense photoexcitation by laser pulses with a duration shorter than the lifetime and reverse phonon frequency in Bi and Sb can lead to a nonequilibrium semimetal—metal phase transition, most likely caused by the instability of the crystal’s electron subsystem.
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Original Russian Text© O.V. Misochko, 2010, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2010, Vol. 74, No. 5, pp. 627–629.
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Misochko, O.V. Nonequilibrium phase transition in v-group semimetals, induced by ultrashort laser pulses. Bull. Russ. Acad. Sci. Phys. 74, 589–591 (2010). https://doi.org/10.3103/S1062873810050023
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DOI: https://doi.org/10.3103/S1062873810050023