Quantum Materials Spectroscopy Centre (QMSC)

QMSC title card

The Quantum Materials Spectroscopy Centre (QMSC) at the Canadian Light Source is a bespoke beamline facility for angle-resolved and spin-resolved photoemission studies of quantum materials. The beamline uses a unique dual-undulator source, with both undulators elliptically polarizing, allowing arbitrary light polarization and covering a combined photon-energy range of 15 to 1200 eV for two dedicated endstations. This architecture is designed to provide high-flux, polarization-controlled spectroscopy of the low-energy electronic structure of both bulk crystals and thin-film materials.

The ARPES endstation is online and accepting proposals. It is equipped with a high-resolution Scienta-Omicron R4000 electron analyzer and operates over 15 to 1200 eV with flux of 10¹² to 10¹³ photons/s, a 20 μm × 100 μm beam spot, resolving power greater than 10,000 across the full energy range, and sample temperatures from 9 to 320 K. Available polarization modes include horizontal, vertical, and left- and right-circular polarization. 

The Spin+ARPES endstation, currently in commissioning, uses a Scienta-Omicron DA30 analyzer and is designed for spin-resolved measurements in the 200 to 1200 eV range with comparable flux.

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Publications

Mixed-valence state in the dilute-impurity regime of La-substituted SmB6

M. Zonno, M. Michiardi, F. Boschini, G. Levy, K. Volkaert, D. Curcio, M. Bianchi, P. F. S. Rosa, Z. Fisk, P. Hofmann, I. S. Elfimov, R. J. Green, G. A. Sawatzky, A. Damascelli. Nat. Commun. 15, 7621 (2024).
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Electronic switching of topology in LaSbTe

J. Bannies, M. Michiardi, H.-H. Kung, M. Oudah, M. Zonno, S. Gorovikov, S. Zhdanovich, I. S. Elfimov, A. Damascelli, M. A. Aronson. Nat. Mater. 25, 427-433 (2026).
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The Three-Dimensional Electronic Structure of LiFeAs: Strong-coupling Superconductivity and Topology in the Iron Pnictides

R.P. Day, M. X. Na, M. Zingl, B. Zwartsenberg, M. Michiardi, G. Levy, M. Schneider, D. Wong, P. Dosanjh, T. M. Pedersen, S. Gorovikov, S. Chi, R. Liang, W.N. Hardy, D.A. Bonn, S. Zhdanovich, I.S. Elfimov, A. Damascelli. Phys. Rev. B 105, 155142 (2022).
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