Measurement of collective excitations in VO2 by resonant inelastic x-ray scattering
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Pre-printDate
2016-10-21Author
He, HGray, AX
Granitzka, P
Jeong, JW
Aetukuri, NP
Kukreja, R
Miao, L
Breitweiser, SA
Wu, J
Huang, YB
Olalde-Velasco, P
Pelliciari, J
Schlotter, WF
Arenholz, E
Schmitt, T
Samant, MG
Parkin, SSP
Dürr, HA
Wray, LA
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http://hdl.handle.net/20.500.12613/5002
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10.1103/PhysRevB.94.161119Abstract
© 2016 American Physical Society. Vanadium dioxide is of broad interest as a spin-12 electron system that realizes a metal-insulator transition near room temperature, due to a combination of strongly correlated and itinerant electron physics. Here, resonant inelastic x-ray scattering is used to measure the excitation spectrum of charge and spin degrees of freedom at the vanadium L edge under different polarization and temperature conditions, revealing excitations that differ greatly from those seen in optical measurements. These spectra encode the evolution of short-range energetics across the metal-insulator transition, including the low-temperature appearance of a strong candidate for the singlet-triplet excitation of a vanadium dimer.Citation to related work
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http://dx.doi.org/10.34944/dspace/4984