| AVS 64th International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures Division | Tuesday Sessions |
| Session MI+2D+AC+NS-TuA |
| Session: | Spin-Orbit Phenomena at Surfaces and Interfaces |
| Presenter: | Philipp Eickholt, Westfälische Wilhelms-Universität Münster, Germany |
| Authors: | P. Eickholt, Westfälische Wilhelms-Universität Münster, Germany M. Holtmann, Westfälische Wilhelms-Universität Münster, Germany C.E. Sanders, Aarhus University, Denmark M. Dendzik, Aarhus University, Denmark M. Bianchi, Aarhus University, Denmark P. Hofmann, Aarhus University, Denmark M. Donath, Westfälische Wilhelms-Universität Münster, Germany |
| Correspondent: | Click to Email |
In the field of 2D materials, single-layer transition metal dichalogenides, especially MoS2 , WS2 , MoSe2 and WSe2, play an important role. Due to their exceptional optical and electronic properties, they are promising materials for optoelectronical applications [1]. The key to understand the material properties is a profound knowledge of the electronic structure. While the occupied electronic structure was investigated in a number of studies, the crucial information about the dispersion and spin structure of the conduction bands is still missing.
Spin- and angle-resolved inverse photoemission (SRIPE) [2] is the ideal technique to study dispersion and spin structure of the unoccupied electronic bands. In this talk, we present a SRIPE study of the conduction bands of single-layer WS2 [3] and MoS2 [4] grown on Au(111).
The focus of the presentation will be on the lowest conduction band near the K valley, which is decisive for the optoelectronic properties of the materials. The results will be discussed in consideration of a recent pump-probe (TR-ARPES) experiment [5], which determined the band gap of the “pumped” system.
[1] D. Xiao et al., Phys. Rev. Lett. 108, 196802 (2012)
[2] S.D. Stolwijk et al., Rev. Sci. Instrum. 85, 013306 (2014)
[3] M. Dendzik et al., Phys. Rev. B 92, 245442 (2015)
[4] A. Bruix et al. Phys. Rev. B 93, 165422 (2016)
[5] A. Grubišic Cabo et al., Nano Lett. 15, 5883 (2015)