The time of a photoinduced spin-Peierls phase transition

Journal Article · Sun Feb 15 00:00:00 EST 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115020041· OSTI ID:22472390

Semenov, A. L., E-mail: [e-mail] ^[1]

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1. Ulyanovsk State University (Russian Federation)

The time τ of the spin-Peierls phase transition is analyzed theoretically as a function of the duration τ{sub p} of the exciting light pulse and the average number x{sub 0} of absorbed photons per magnetic ion after the transmission of the pulse. It is shown that the phase transition occurs at x{sub 0} > x{sub c}. The critical value x{sub c} is determined as a function of the duration τ{sub p} of the light pulse. A photoinduced variation in the optical reflection coefficient R is calculated as a function of time t. The results of calculation are compared with experimental data on ultrafast photoinduced melting of the low-temperature spin-Peierls phase into potassium tetracyanoquinodimethan (K-TCNQ)

• OSTI ID: 22472390
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 120, Issue 2; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC PULSES
MELTING
OPTICAL REFLECTION
PHASE TRANSFORMATIONS
PHOTONS
POTASSIUM COMPOUNDS
QUINONES
SPIN
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
VARIATIONS
VISIBLE RADIATION