Ultrasonic exploration of vacancy centres with the Jahn–Teller effect. Application to the ZnSe crystal
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Ultrasonic exploration of vacancy centres with the Jahn–Teller effect. Application to the ZnSe crystal
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| Автор |
Averkiev, N. S.
Bersuker, I. B. Gudkov, V. V. Baryshnikov, K. A. Colibaba, G. V. Zhevstovskikh, I. V. Mayakin, V. Y. Monakhov, A. M. Nedeoglo, D. D. Sarychev, M. N. Surikov, V. T. |
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| Тематика |
ELASTIC MODULI
JAHN-TELLER EFFECT RELAXATION ULTRASOUND VACANCIES ZNSE |
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| Описание |
We show that the structure, properties, and concentration of vacancies in crystals can be studied by ultrasonic experiments previously employed for impurity centres only. Measurements of the temperature dependence of attenuation and phase velocities of ultrasonic shear waves of 52MHz propagating along the crystallographic axis [110] of nominally pure ZnSe single crystals (grown by the seeded physical vapour transport method) show strong anomalies which are typical for relaxation processes in system with isolated Jahn-Teller (JT) centres. The observed JT distortion mode is trigonal, subject to a threefold orbitally degenerate T-term interaction with trigonal and tetragonal nuclear displacements. In the absence of sufficiently high concentrations of impurity atoms with such properties we attributed the observed JT centres to zinc vacancies. The temperature dependence of the isothermal and adiabatic forms of the appropriate elastic modulus and the relaxation time show that the relaxation mechanism changes from thermal activation at higher temperatures to tunnelling through a potential energy barrier below 18K. We provide an estimate of the magnitude of the potential barrier, as well as the pseudorotation frequency and concentration of vacancies. Also we determine the extremum points of the adiabatic potential energy surface of the vacancy centre. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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| Дата |
2019-07-17T10:00:10Z
2019-07-17T10:00:10Z 2014 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
0370-1972
https://www.scopus.com/record/display.uri?origin=resultslist&eid=2-s2.0-84905588141 https://elar.rsvpu.ru/handle/123456789/28078 10.1002/pssb.201451092 84905588141 2-s2.0-84905588141 Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26 Polytekhnicheskaya St., St.-Petersburg 194021, Russian Federation Institute for Theoretical Chemistry, The University of Texas at Austin, 105 E. 24-th St. Stop A5300, Austin, TX 78712-1224, United States Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira St., Ekaterinburg 620002, Russian Federation Russian Vocational Pedagogical University, 11 Mashinostroiteley St., Ekaterinburg 620012, Russian Federation Moldova State University, 60 A. Mateevici St., Chisinau MD-2009, Moldova Institute for Metal Physics, Ural Division of the Russian Academy of Sciences, 18 S. Kovalevskaya St., Ekaterinburg 620990, Russian Federation Institute of Solid State Chemistry, Ural Division of the Russian Academy of Sciences, 91 Pervomaiskaya St., Ekaterinburg 620990, Russian Federation Scopus Averkiev, N.S., Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26 Polytekhnicheskaya St., St.-Petersburg 194021, Russian Federation Bersuker, I.B., Institute for Theoretical Chemistry, The University of Texas at Austin, 105 E. 24-th St. Stop A5300, Austin, TX 78712-1224, United States Gudkov, V.V., Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira St., Ekaterinburg 620002, Russian Federation, Russian Vocational Pedagogical University, 11 Mashinostroiteley St., Ekaterinburg 620012, Russian Federation Baryshnikov, K.A., Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26 Polytekhnicheskaya St., St.-Petersburg 194021, Russian Federation Colibaba, G.V., Moldova State University, 60 A. Mateevici St., Chisinau MD-2009, Moldova Zhevstovskikh, I.V., Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira St., Ekaterinburg 620002, Russian Federation, Institute for Metal Physics, Ural Division of the Russian Academy of Sciences, 18 S. Kovalevskaya St., Ekaterinburg 620990, Russian Federation Mayakin, V.Y., Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira St., Ekaterinburg 620002, Russian Federation Monakhov, A.M., Ioffe Physical-Technical Institute, Russian Academy of Sciences, 26 Polytekhnicheskaya St., St.-Petersburg 194021, Russian Federation Nedeoglo, D.D., Moldova State University, 60 A. Mateevici St., Chisinau MD-2009, Moldova Sarychev, M.N., Ural Federal University named after the first President of Russia B.N. Yeltsin, 19 Mira St., Ekaterinburg 620002, Russian Federation Surikov, V.T., Institute of Solid State Chemistry, Ural Division of the Russian Academy of Sciences, 91 Pervomaiskaya St., Ekaterinburg 620990, Russian Federation WOS:000340454200016 000340454200016 |
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| Язык |
en
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| Права |
Restricted accedd (info:eu-repo/semantics/restrictedAccess)
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| Формат |
text/html
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| Охват |
RSVPU
SCOPUS |
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| Издатель |
Wiley-Blackwell
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| Источник |
Physica Status Solidi (B) Basic Research
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