Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111)
書誌事項
- 公開日
- 2015-10-02
- 資源種別
- journal article
- 権利情報
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- http://link.aps.org/licenses/aps-default-license
- DOI
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- 10.1103/physrevlett.115.147003
- 公開者
- American Physical Society (APS)
この論文をさがす
説明
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.
収録刊行物
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- Physical Review Letters
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Physical Review Letters 115 (14), 147003-, 2015-10-02
American Physical Society (APS)
