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Group SCI SB HD

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Related publications (122)

Separating the bulk and surface n- to p-type transition in the topological insulator GeBi4-xSbxTe7

We identify the multilayered compound GeBi4Te7 to be a topological insulator with a Dirac point slightly above the valence band maximum, using angle-resolved photoemission spectroscopy (ARPES) measurements. The spin polarization satisfies the time reversal ...

2013

Bulk and surface Rashba splitting in single termination BiTeCl

Jan Hugo Dil, Thorsten Schmitt, Vladimir N. Strocov, Stefan Peter Muff

By angle-resolved photoemission spectroscopy (ARPES) we observe a giant Rashba-type spin splitting in the electronic bulk conduction and valence bands of the semiconductor BiTeCl. This material belongs to the group of bismuth tellurohalides BiTeX (X=Cl,Br, ...

2013

Elemental Topological Insulator with Tunable Fermi Level: Strained alpha-Sn on InSb(001)

Jan Hugo Dil

We report on the epitaxial fabrication and electronic properties of a topological phase in strained alpha-Sn on InSb. The topological surface state forms in the presence of an unusual band order not based on direct spin-orbit coupling, as shown in density ...

2013

Excitation of Coherent Phonons in the One-Dimensional Bi(114) Surface

Jan Hugo Dil

We present time-resolved photoemission experiments from a peculiar bismuth surface, Bi(114). The strong one-dimensional character of this surface is reflected in the Fermi surface, which consists of spin-polarized straight lines. Our results show that the ...

2013

Surface and bulk electronic structure of the strongly correlated system SmB6 and implications for a topological Kondo insulator

Jan Hugo Dil, Joël Mesot, Kazimierz Conder

Recent theoretical calculations and experimental results suggest that the strongly correlated material SmB6 may be a realization of a topological Kondo insulator. We have performed an angle-resolved photoemission spectroscopy study on SmB6 in order to eluc ...

Amer Physical Soc2013

Interband spin-orbit coupling between anti-parallel spin states in Pb quantum well states

Jan Hugo Dil, Stefan Peter Muff

Using spin and angle-resolved photoemission spectroscopy we investigate a momentum region in Pb quantum well states on Si(111) where hybridization between Rashba-split bands alters the band structure significantly. Starting from the Rashba regime where the ...

2013

Origin of Rashba splitting in the quantized subbands at the Bi2Se3 surface

Klaus Kern, Christian Reinhard Ast

We study the band structure of the Bi2Se3 topological insulator (1 1 1) surface using angle-resolved photoemission spectroscopy. We examine the situation where two sets of quantized subbands exhibiting different Rashba spin splitting are created via bendin ...

Amer Physical Soc2013

Combined large spin splitting and one-dimensional confinement in surface alloys

Klaus Kern, Marco Grioni, Alberto Crepaldi

We have found and characterized, by angle-resolved photoelectron spectroscopy (ARPES), quasi-one-dimensional spin-split states in chain-like surface alloys formed by large Z elements (Bi and Pb) at the Cu(110) surface. The ARPES results are supported by fi ...

Iop Publishing Ltd2013

Engineering quantum spin Hall effect in graphene nanoribbons via edge functionalization

Oleg Yazyev, Gabriel Albert Autes

Kane and Mele predicted that in the presence of spin-orbit interaction graphene realizes the quantum spin Hall state [Phys. Rev. Lett. 95, 226801 (2005)]. However, exceptionally weak intrinsic spin-orbit splitting in graphene (approximate to 10(-5) eV) inh ...

Amer Physical Soc2013

Non-local quasiparticle excitations

Johan Juul Chang

A poster discussion how Landau Fermi-liquid quasiparticles can breakdown in momentum space. ...

2013

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