Shubnikov–de Haas Oscillations in p and n-type Topological Insulator (BixSb1−x)2Te3 | Sciact - CRIS-система Института катализа

Shubnikov–de Haas Oscillations in p and n-type Topological Insulator (BixSb1−x)2Te3 Научная публикация

Журнал

Journal of Physics Condensed Matter
ISSN: 0953-8984 , E-ISSN: 1361-648X

Вых. Данные

Год: 2018, Том: 30, Номер: 26, Номер статьи : 265001, Страниц : 8 DOI: 10.1088/1361-648x/aac59b

Ключевые слова

topological insulator, Shubnikov–de Haas oscillation, (BixSb1−x)2Te3, Berry phase, electrical transport, quantum oscillation

Авторы

Akiyama Ryota ¹ , Sumida Kazuki ² , Ichinokura Satoru ¹ , Nakanishi Ryosuke ¹ , Kimura Akio ² , Kokh Konstantin A ^3,4,5 , Tereshchenko Oleg E ^3,4,6 , Hasegawa Shuji ¹

Организации

1	Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2	Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
3	Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
4	Saint Petersburg State University, Saint Petersburg 198504, Russia
5	V.S. Sobolev Institute of Geology and Mineralogy, Novosibirsk 630090, Russia
6	A.V. Rzhanov Institute of Semiconductor Physics, Novosibirsk 630090, Russia

We show Shubnikov–de Haas (SdH) oscillations in topological insulator (BixSb1−x)2Te3 flakes whose carrier types are p-type (x = 0.29, 0.34) and n-type (x = 0.42). The physical properties such as the Berry phase, carrier mobility, and scattering time significantly changed by tuning the Fermi-level position with the concentration x. The analyses of SdH oscillations by Landau-level fan diagram, Lifshitz–Kosevich theory, and Dingle-plot in the p-type samples with x = 0.29 and 0.34 showed the Berry phase of zero and a relatively low mobility (2000–6000 cm2 V−1 s−1). This is due to the dominant bulk component in transport. On the other hand, the mobility in the n-type sample with x = 0.42 reached a very large value ~17 000 cm2 V−1 s−1 and the Berry phase of near π, whereas the SdH oscillations were neither purely two- nor three-dimensional. These suggest that the transport channel has a surface-bulk coupling state which makes the carrier scattering lesser and enhances the mobility and has a character between two- and three-dimension.

Akiyama R. , Sumida K. , Ichinokura S. , Nakanishi R. , Kimura A. , Kokh K.A. , Tereshchenko O.E. , Hasegawa S.
Shubnikov–de Haas Oscillations in p and n-type Topological Insulator (BixSb1−x)2Te3
Journal of Physics Condensed Matter. 2018. V.30. N26. 265001 :1-8. DOI: 10.1088/1361-648x/aac59b WOS Scopus CAPlusCA PMID OpenAlex

Поступила в редакцию:	31 янв. 2018 г.
Принята к публикации:	17 мая 2018 г.
Опубликована online:	6 июн. 2018 г.
Опубликована в печати:	4 июл. 2018 г.

Web of science:	WOS:000434445900001
Scopus:	2-s2.0-85049032658
Chemical Abstracts:	2018:1824086
Chemical Abstracts (print):	171:279394
PMID (PubMed):	29770777
OpenAlex:	W3102347149

БД	Цитирований
Scopus	17
OpenAlex	13
Web of science	16