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

被引：104

作者：

Matetskiy, A. V. ^{[1
,2
]}

Ichinokura, S. ^{[3
]}

Bondarenko, L. V. ^{[1
,2
]}

Tupchaya, A. Y. ^{[1
,2
]}

Gruznev, D. V. ^{[1
,2
]}

Zotov, A. V. ^{[1
,2
,4
]}

Saranin, A. A. ^{[1
,2
]}

Hobara, R. ^{[3
]}

Takayama, A. ^{[3
]}

Hasegawa, S. ^{[3
]}

机构：

[1] Inst Automat & Control Proc FEB RAS, Vladivostok 690041, Russia

[2] Far Eastern Fed Univ, Sch Nat Sci, Vladivostok 690000, Russia

[3] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[4] Vladivostok State Univ Econ & Serv, Dept Elect, Vladivostok 690600, Russia

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 14期

基金：

俄罗斯科学基金会; 日本学术振兴会;

关键词：

PHASE-TRANSITION; SILICON; FILMS; SYSTEMS; SURFACE;

D O I：

10.1103/PhysRevLett.115.147003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having root 3 x root 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.

引用

页数：5

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