Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3

A. Almoalem; I. Silber; S. Sandik; M. Lotem; A. Ribak; Y. Nitzav; A. Yu Kuntsevich; O. A. Sobolevskiy; Yu G. Selivanov; V. A. Prudkoglyad; M. Shi; L. Petaccia; M. Goldstein; Y. Dagan; A. Kanigel

doi:https://doi.org/10.1103/PhysRevB.103.174518

Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3

A. Almoalem, I. Silber, S. Sandik, M. Lotem, A. Ribak, Y. Nitzav, A. Yu Kuntsevich, O. A. Sobolevskiy, Yu G. Selivanov, V. A. Prudkoglyad, M. Shi, L. Petaccia, M. Goldstein, Y. Dagan, A. Kanigel

Technion - Israel Institute of Technology, Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

Topological superconductivity is an exotic phase of matter in which the fully gapped superconducting bulk hosts gapless Majorana surface states protected by topology. Intercalation of copper, strontium, or niobium between the quintuple layers of the topological insulator Bi2Se3 increases the carrier density and leads to superconductivity that is suggested to be topological. Here we study the electronic structure of strontium-intercalated Bi2Se3 using angle-resolved photoemission spectroscopy and Shubnikov-de Haas oscillations. Despite the apparent low Hall number of ∼2×1019cm-3, we show that the Fermi surface has the shape of an open cylinder with a larger carrier density of ∼1020cm-3. We suggest that superconductivity in intercalated Bi2Se3 emerges with the appearance of a quasi-Two-dimensional open Fermi surface.

Original language	American English
Article number	174518
Journal	Physical Review B
Volume	103
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.103.174518
State	Published - 26 May 2021

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Almoalem, A., Silber, I., Sandik, S., Lotem, M., Ribak, A., Nitzav, Y., Kuntsevich, A. Y., Sobolevskiy, O. A., Selivanov, Y. G., Prudkoglyad, V. A., Shi, M., Petaccia, L., Goldstein, M., Dagan, Y., & Kanigel, A. (2021). Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3. Physical Review B, 103(17), Article 174518. https://doi.org/10.1103/PhysRevB.103.174518

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title = "Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3",

abstract = "Topological superconductivity is an exotic phase of matter in which the fully gapped superconducting bulk hosts gapless Majorana surface states protected by topology. Intercalation of copper, strontium, or niobium between the quintuple layers of the topological insulator Bi2Se3 increases the carrier density and leads to superconductivity that is suggested to be topological. Here we study the electronic structure of strontium-intercalated Bi2Se3 using angle-resolved photoemission spectroscopy and Shubnikov-de Haas oscillations. Despite the apparent low Hall number of ∼2×1019cm-3, we show that the Fermi surface has the shape of an open cylinder with a larger carrier density of ∼1020cm-3. We suggest that superconductivity in intercalated Bi2Se3 emerges with the appearance of a quasi-Two-dimensional open Fermi surface.",

author = "A. Almoalem and I. Silber and S. Sandik and M. Lotem and A. Ribak and Y. Nitzav and Kuntsevich, {A. Yu} and Sobolevskiy, {O. A.} and Selivanov, {Yu G.} and Prudkoglyad, {V. A.} and M. Shi and L. Petaccia and M. Goldstein and Y. Dagan and A. Kanigel",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

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doi = "https://doi.org/10.1103/PhysRevB.103.174518",

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T1 - Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3

AU - Almoalem, A.

AU - Silber, I.

AU - Sandik, S.

AU - Lotem, M.

AU - Ribak, A.

AU - Nitzav, Y.

AU - Kuntsevich, A. Yu

AU - Sobolevskiy, O. A.

AU - Selivanov, Yu G.

AU - Prudkoglyad, V. A.

AU - Shi, M.

AU - Petaccia, L.

AU - Goldstein, M.

AU - Dagan, Y.

AU - Kanigel, A.

PY - 2021/5/26

Y1 - 2021/5/26

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AB - Topological superconductivity is an exotic phase of matter in which the fully gapped superconducting bulk hosts gapless Majorana surface states protected by topology. Intercalation of copper, strontium, or niobium between the quintuple layers of the topological insulator Bi2Se3 increases the carrier density and leads to superconductivity that is suggested to be topological. Here we study the electronic structure of strontium-intercalated Bi2Se3 using angle-resolved photoemission spectroscopy and Shubnikov-de Haas oscillations. Despite the apparent low Hall number of ∼2×1019cm-3, we show that the Fermi surface has the shape of an open cylinder with a larger carrier density of ∼1020cm-3. We suggest that superconductivity in intercalated Bi2Se3 emerges with the appearance of a quasi-Two-dimensional open Fermi surface.

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VL - 103

JO - Physical Review B

JF - Physical Review B

IS - 17

M1 - 174518

ER -

Link between superconductivity and a Lifshitz transition in intercalated Bi2 Se3

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