Spin-orbit split two-dimensional electron gas with tunable Rashba and Fermi energy

被引：101

作者：

Ast, Christian R. ^{[1
,2
]}

Pacile, Daniela ^{[2
]}

Moreschini, Luca ^{[2
]}

Falub, Mihaela C. ^{[2
]}

Papagno, Marco ^{[2
]}

Kern, Klaus ^{[1
,2
]}

Grioni, Marco ^{[2
]}

Henk, Juergen ^{[3
]}

Ernst, Arthur ^{[3
]}

Ostanin, Sergey ^{[3
]}

Bruno, Patrick ^{[3
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland

[3] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Saale, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.77.081407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that it is possible to tune the Rashba energy, introduced by a strong spin-orbit splitting, and the Fermi energy in a two-dimensional electron gas by a controlled change of stoichiometry in an artificial surface alloy. In the Bi(x)Pb(1-x)/Ag(111) surface alloy, the spin-orbit interaction maintains a dramatic influence on the band dispersion for arbitrary Bi concentration x, as is shown by angle-resolved photoelectron spectroscopy. The Rashba energy E(R) and the Fermi energy E(F) can be tuned to achieve values larger than one for the ratio E(R)/E(F), which opens up the possibility for observing phenomena, such as corrections to the Fermi liquid or a superconducting state. Relativistic first-principles calculations explain the experimental findings.

引用

页数：4

共 21 条

[1] Giant spin splitting through surface alloying [J].

Ast, Christian R. ;

Henk, Juergen ;

Ernst, Arthur ;

Moreschini, Luca ;

Falub, Mihaela C. ;

Pacile, Daniela ;

Bruno, Patrick ;

Kern, Klaus ;

Grioni, Marco .

PHYSICAL REVIEW LETTERS, 2007, 98 (18)

[2] Heavy fermion superconductivity and magnetic order in noncentrosymmetric CePt3Si -: art. no. 027003 [J].

Bauer, E ;

Hilscher, G ;

Michor, H ;

Paul, C ;

Scheidt, EW ;

Gribanov, A ;

Seropegin, Y ;

Noël, H ;

Sigrist, M ;

Rogl, P .

PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4

[3] Enhanced Rashba spin-orbit splitting in Bi/Ag(111) and Pb/Ag(111) surface alloys from first principles [J].

Bihlmayer, G. ;

Bluegel, S. ;

Chulkov, E. V. .

PHYSICAL REVIEW B, 2007, 75 (19)

[4]

BYCHKOV YA, 1984, JETP LETT+, V39, P78

[5] Electron-phonon effects on spin-orbit split bands of two-dimensional systems [J].

Cappelluti, E. ;

Grimaldi, C. ;

Marsiglio, F. .

PHYSICAL REVIEW B, 2007, 76 (08)

[6] Topological change of the fermi surface in low-density Rashba gases: Application to superconductivity [J].

Cappelluti, E. ;

Grimaldi, C. ;

Marsiglio, F. .

PHYSICAL REVIEW LETTERS, 2007, 98 (16)

[7] Interplay between structural, chemical, and spectroscopic properties of Ag/Au(111) epitaxial ultrathin films: A way to tune the Rashba coupling [J].

Cercellier, H. ;

Didiot, C. ;

Fagot-Revurat, Y. ;

Kierren, B. ;

Moreau, L. ;

Malterre, D. ;

Reinert, F. .

PHYSICAL REVIEW B, 2006, 73 (19)

[8] Giant spin-orbit splitting in a HgTe quantum well -: art. no. 115328 [J].

Gui, YS ;

Becker, CR ;

Dai, N ;

Liu, J ;

Qiu, ZJ ;

Novik, EG ;

Schäfer, M ;

Shu, XZ ;

Chu, JH ;

Buhmann, H ;

Molenkamp, LW .

PHYSICAL REVIEW B, 2004, 70 (11) :115328-1

[9] Spin-orbit coupling in the L-gap surface states of Au(111): spin-resolved photoemission experiments and first-principles calculations [J].

Henk, J ;

Hoesch, M ;

Osterwalder, J ;

Ernst, A ;

Bruno, P .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (43) :7581-7597

[10] Strong spin-orbit splitting on Bi surfaces -: art. no. 046403 [J].

Koroteev, YM ;

Bihlmayer, G ;

Gayone, JE ;

Chulkov, EV ;

Blügel, S ;

Echenique, PM ;

Hofmann, P .

PHYSICAL REVIEW LETTERS, 2004, 93 (04) :046403-1

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