Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111)

A. V. Matetskiy; S. Ichinokura; L. V. Bondarenko; A. Y. Tupchaya; D. V. Gruznev; A. V. Zotov; A. A. Saranin; R. Hobara; A. Takayama; S. Hasegawa

doi:10.1103/PhysRevLett.115.147003

Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111)

A. V. Matetskiy, S. Ichinokura, L. V. Bondarenko, A. Y. Tupchaya, D. V. Gruznev, A. V. Zotov, A. A. Saranin, R. Hobara, A. Takayama, S. Hasegawa

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

73 Citations (Scopus)

Abstract

A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having 3×3 periodicity was found to exhibit a giant Rashba-type spin splitting of metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for one of the spin-split bands. In situ micro-four-point-probe conductivity measurements with and without magnetic field demonstrated that the (Tl, Pb)/Si(111) system transformed into the superconducting state at 2.25 K, followed by the Berezinskii-Kosterlitz-Thouless mechanism. The 2D Tl-Pb compound on Si(111) is believed to be the prototypical object for prospective studies of intriguing properties of the superconducting 2D system with lifted spin degeneracy, bearing in mind that its composition, atomic and electron band structures, and spin texture are already well established.

Original language	English
Article number	147003
Journal	Physical Review Letters
Volume	115
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.115.147003
Publication status	Published - 2015 Oct 2
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Two-Dimensional Superconductor with a Giant Rashba Effect : One-Atom-Layer Tl-Pb Compound on Si(111). / Matetskiy, A. V.; Ichinokura, S.; Bondarenko, L. V.; Tupchaya, A. Y.; Gruznev, D. V.; Zotov, A. V.; Saranin, A. A.; Hobara, R.; Takayama, A.; Hasegawa, S.

In: Physical Review Letters, Vol. 115, No. 14, 147003, 02.10.2015.

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

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abstract = "A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having 3×3 periodicity was found to exhibit a giant Rashba-type spin splitting of metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for one of the spin-split bands. In situ micro-four-point-probe conductivity measurements with and without magnetic field demonstrated that the (Tl, Pb)/Si(111) system transformed into the superconducting state at 2.25 K, followed by the Berezinskii-Kosterlitz-Thouless mechanism. The 2D Tl-Pb compound on Si(111) is believed to be the prototypical object for prospective studies of intriguing properties of the superconducting 2D system with lifted spin degeneracy, bearing in mind that its composition, atomic and electron band structures, and spin texture are already well established.",

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AU - Zotov, A. V.

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AU - Hasegawa, S.

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Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111)

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