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10 papers
Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector
Takuma Iwata, T. Kousa, Y. Nishioka +11
We have developed a state-of-the-art apparatus for laser-based spin- and angle-resolved photoemission spectroscopy with micrometer spatial resolution (micro-SARPES). This equipment…
Evidence of 3D Dirac conical bands in TlBiSSe by optical and magneto-optical spectroscopy
F. Le Mardelé, J. Wyzula, I. Mohelsky +15
TlBiSSe is a rare realization of a 3D semimetal with a conically dispersing band that has an optical response which is well isolated from other contributions in a broad range of ph…
Ultrafast electron dynamics in a topological surface state observed in two-dimensional momentum space
J. Reimann, K. Sumida, M. Kakoki +5
We study ultrafast population dynamics in the topological surface state of SbTe in two-dimensional momentum space with time- and angle-resolved two-photon photoemission. Li…
Sample-dependent Dirac point gap in MnBiTe and its response to the applied surface charge: a combined photoemission and ab initio study
A. M. Shikin, D. A. Estyunin, N. L. Zaitsev +16
Recently discovered intrinsic antiferromagnetic topological insulator MnBiTe presents an exciting platform for realization of the quantum anomalous Hall effect and a number…
Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator MnBiTe
A. M. Shikin, D. A. Estyunin, I. I. Klimovskikh +18
Modification of the gap at the Dirac point (DP) in antiferromagnetic (AFM) axion topological insulator MnBiTe and its electronic and spin structure has been studied by angl…
Prediction and observation of the first antiferromagnetic topological insulator
Mikhail M. Otrokov, Ilya I. Klimovskikh, Hendrik Bentmann +41
Magnetic topological insulators (MTIs) are narrow gap semiconductor materials that combine non-trivial band topology and magnetic order. Unlike their nonmagnetic counterparts, MTIs…