Details

Autor(en) / Beteiligte

• Kuroda, K
• Miyahara, H
• Ye, M
• Eremeev, S V
• Koroteev, Yu M
• Krasovskii, E E
• Chulkov, E V
• Hiramoto, S
• Moriyoshi, C
• Kuroiwa, Y
• Miyamoto, K
• Okuda, T
• Arita, M
• Shimada, K
• Namatame, H
• Taniguchi, M
• Ueda, Y
• Kimura, A

Titel

Experimental verification of PbBi2Te4 as a 3D topological insulator

Ist Teil von

• Physical review letters, 2012-05, Vol.108 (20), p.206803-206803

Ort / Verlag

United States

Erscheinungsjahr

2012

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• The experimental evidence is presented of the topological insulator state in PbBi2Te4. A single surface Dirac cone is observed by angle-resolved photoemission spectroscopy with synchrotron radiation. Topological invariants Z2 are calculated from the ab initio band structure to be 1;(111). The observed two-dimensional isoenergy contours in the bulk energy gap are found to be the largest among the known three-dimensional topological insulators. This opens a pathway to achieving a sufficiently large spin current density in future spintronic devices.