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Загальна кількість знайдених документів : 3
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Kartsovnik M. V. Magnetic quantum oscillations in the charge-density-wave state of the organic metals α-(BEDT-TTF)2MHg(SCN)4 with M = K and Tl [Електронний ресурс] / M. V. Kartsovnik, V. N. Zverev, D. Andres, W. Biberacher, T. Helm, P. D. Grigoriev, R. Ramazashvili, N. D. Kushch, H. Müller // Физика низких температур. - 2014. - Т. 40, № 4. - С. 484-491. - Режим доступу: http://nbuv.gov.ua/UJRN/PhNT_2014_40_4_19 The low-temperalure charge-density-wave (CDW) state in the layered organic metals alpha-(BEDT-TTF)2MHg(SCN)4 has been studied by means of the Shubnikov - de Haas and de Haas - van Alphen effects. In addition to the dominant alpha-frequency, which is also observed in the normal state, both the magnetoresistance and magnetic torque possess a slowly oscillating component. These slow oscillations provide a firm evidence for the CDW-induced reconstruction of the original cylindrical Fermi surface. The alpha-oscillations of the interlayer magnetoresistance exhibit an anomalous phase inversion in the CDW state, whereas the de Haas - van Alphen signal maintains the normal phase. We argue that the anomaly may be attributed to the magnetic-breakdown origin of the alpha-oscillations in the CDW state. A theoretical model illustrating the possibility of a phase inversion in the oscillating interlayer conductivity in the presence of a spatially fluctuating magnetic breakdown gap is proposed.
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Andres D. Field-induced charge-density-wave transitions in the organic metal α-(BEDT-TTF)2KHg(SCN)4 under pressure [Електронний ресурс] / D. Andres, M. V. Kartsovnik, W. Biberacher, K. Neumaier, I. Sheikin, H. Müller, N. D. Kushch // Физика низких температур. - 2011. - Т. 37, № 9-10. - С. 959-969. - Режим доступу: http://nbuv.gov.ua/UJRN/PhNT_2011_37_9-10_9 Successive magnetic-field-induced charge-density-wave transitions in the layered molecular conductor alpha-(BEDT-TTF)2KHg(SCN)4 are studied in the hydrostatic pressure regime, in which the zero field charge-density-wave (CDW) state is completely suppressed. The orbital effect of the magnetic field is demonstrated to restore the density wave, while the orbital quantization induces transitions between different CDW states at changing the field strength. The latter appear as distinct anomalies in the magnetoresistance as a function of field. The interplay between the orbital and Pauli paramagnetic effects acting, respectively, to enhance and to suppress the CDW instability is particularly manifest in the angular dependence of the field-induced anomalies.
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Kartsovnik M. V. Shubnikov–de Haas oscillations and electronic correlations in the layered organic metal κ-(BETS)2 Mn|N(CN)2|3 [Електронний ресурс] / M. V. Kartsovnik, V. N. Zverev, W. Biberacher, S. V. Simonov, I. Sheikin, N. D. Kushch, E. B. Yagubskii // Физика низких температур. - 2017. - Т. 43, № 2. - С. 291-296. - Режим доступу: http://nbuv.gov.ua/UJRN/PhNT_2017_43_2_10
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