Recent developments in the determination of the amplitude and phase of quantum oscillations for the linear chain of coupled orbits

• Опубліковано в: Физика низких температур
• Дата: 2014
• ISSN: 0132-6414
• Автори: Audouard, А., Fortin, J.-Y.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
• Теми: Магнитоквантовые осцилляции
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/119463
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Recent developments in the determination of the amplitude and phase of quantum oscillations for the linear chain of coupled orbits / A. Audouard, J.-Y. Fortin // Физика низких температур. — 2014. — Т. 40, № 4. — С. 444-453. — Бібліогр.: 29 назв. — англ.

De Haas-van Alphen oscillations are studied for Fermi surfaces (FS) illustrating the model proposed by
 Pippard in the early sixties, namely the linear chain of orbits coupled by magnetic breakdown. This FS topology
 is relevant to many multiband quasi-two-dimensional (q-2D) organic metals such as -(BEDT–TTF)₂Cu(NCS)₂
 and -(BEDT–TTF)₄CoBr₄ (C₆H₄Cl₂) which are considered in detail. Whereas the Lifshits–Kosevich model only
 involves a first order development of field- and temperature-dependent damping factors, second order terms
 may have significant contribution to the Fourier components amplitude for such q-2D systems at high magnetic
 field and low temperature. The strength of these second order terms depends on the relative value of the involved
 damping factors, which are in turns strongly dependent on parameters such as the magnetic breakdown field, effective
 masses and, most of all, effective Landé factors. In addition, the influence of field-dependent Onsager
 phase factors on the oscillation spectra is considered.