Development of deflector mode for spin-resolved time-of-flight photoemission spectroscopy

Han, Xue; Qu, Jason; Sakamoto, Shoya; Liu, Dongyu; Guan, Dandan; Liu, Jin; Li, Hui; Rotundu, Costel R.; Andresen, Nord; Jozwiak, Chris; Hussain, Zahid; Shen, Zhi-Xun; Sobota, Jonathan A.

doi:10.1063/5.0168447

Title: Development of deflector mode for spin-resolved time-of-flight photoemission spectroscopy

Journal Article · 18 October 2023 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/5.0168447 · OSTI ID:2222664

^[1];

^[2]; Liu, Dongyu ^[1];

^[3]; Liu, Jin ^[4]; Li, Hui ^[4];

^[5]; Andresen, Nord ^[6];

^[5];

^[7]; Shen, Zhi-Xun ^[1];

^[5]

SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences; Stanford Univ., CA (United States). Geballe Laboratory for Advanced Materials
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences; University of Tokyo (Japan)
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences; Shanghai Jiao Tong University (China); Tsung-Dao Lee Institute, Shanghai (China)
Shenzhen University (China)
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Spin- and angle-resolved photoemission spectroscopy (“spin-ARPES”) is a powerful technique for probing the spin degree-of-freedom in materials with nontrivial topology, magnetism, and strong correlations. Spin-ARPES faces severe experimental challenges compared to conventional ARPES attributed to the dramatically lower efficiency of its detection mechanism, making it crucial for instrumentation developments that improve the overall performance of the technique. Here in this paper, we demonstrate the functionality of our spin-ARPES setup based on time-of-flight spectroscopy and introduce our recent development of an electrostatic deflector mode to map out spin-resolved band structures without sample rotation. We demonstrate the functionality by presenting the spin-resolved spectra of the topological insulator Bi2Te3 and describe in detail the spectrum calibrations based on numerical simulations. By implementing the deflector mode, we minimize the need for sample rotation during measurements, hence improving the overall efficiency of experiments on small or inhomogeneous samples.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Gordon and Betty Moore Foundation; Japan Society for the Promotion of Science (JSPS); National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: AC02-76SF00515; GBMF4546; 11904236; AC02-05CH11231

OSTI ID:: 2222664

Journal Information:: Review of Scientific Instruments, Vol. 94, Issue 10; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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