Mrs
Ilenia Grimaldi
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy)
Topological insulators have emerged as a novel quantum state of matter[1,2]. The Dirac-like surface state and the peculiar spin-texture play an essential role in manipulating spin-polarization and spin-current. For future topological-based devices, a fine tailoring of electronic properties and robustness against air exposure are required. An innovative approach may rely on lead-based ternary chalcogenides[3,4]. By performing detailed ARPES and STM investigations of PbBi4Te7 and PbBi6Te10, we provide evidence of coexisting topological surface states (TSSs) due to different surface terminations and Rashba-like split states close to the Fermi level. TSSs and Rashba-like states display a prevalent two-dimensional character and are barely affected by air exposure. XPS measurements and DFT simulations suggest Rashba-like states stem from van der Waals gap expansion.
Mrs
Ilenia Grimaldi
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy)
Dr
Daniela Pacilè
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy)
Dr
Sergey V Eremeev
(Institute of Strength Physics and Materials Science, 643021 Tomsk, Russia - Tomsk State University, 634050 Tomsk, Russia - Saint Petersburg State University, Saint Petersburg, 198504, Russia)
Dr
Marco Caputo
(Sincrotrone Trieste SCpA, SS14 Km 163.5, Trieste, Italy)
Dr
Michele Pisarra
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy - Departamento de Quimica, Mòdulo 13, Universidad Autnoma de Madrid, 28049 Madrid, Spain)
Dr
Oreste De Luca
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy)
Dr
Jun Fujii
(CNR-IOM, TASC Laboratory, AREA Science Park Basovizza, 34149 Trieste, Italy)
Dr
Ziya S. Aliev
(Azerbaijan State Oil and Industry University, AZ1010 Baku, Azerbaijan - Materials Science and Nanotechnology Department, Near East University, North Cyprus, Mersin 10, 99138 Nicosia, Turkey)
Dr
Mahammad B. Babanly
(Institute Catalysis and Inorganic Chemistry, Azerbaijan National Academyof Science, AZ1143 Baku, Azerbaijan)
Dr
Ivana Vobornik
(CNR-IOM, TASC Laboratory, AREA Science Park Basovizza, 34149 Trieste, Italy)
Dr
Raffaele G. Agostino
(Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy)
Dr
Andrea Goldoni
(Sincrotrone Trieste SCpA, SS14 Km 163.5, Trieste, Italy)
Dr
Evgeny V. Chulkov
(Donostia International Physics Center (DIPC), 20018 San Sebastiàn/Donostia, Basque Country, Spain - Departamento de Fìsica de Materiales UPV/EHU, Centro de Fìsica de Materiales CFM-MPC and Centro Mixto CSIC-UPV/EHU. 20080 San Sebastiàn)
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