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Magnetic-field-induced insulator-metal transition in W-doped VO₂ at 500 T

Physics

Magnetic-field-induced insulator-metal transition in W-doped VO₂ at 500 T

Y. H. Matsuda, D. Nakamura, et al.

This groundbreaking research explores the metal-insulator transition in tungsten-doped vanadium dioxide, revealing how an ultrahigh magnetic field can induce a metallic state in the insulating phase. Conducted by Yasuhiro H. Matsuda and colleagues, this study challenges conventional understandings by suggesting that structural instability drives the transition more than electron correlation.

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Playback language: English
Abstract
This paper investigates the metal-insulator (MI) transition in tungsten (W)-doped vanadium dioxide (VO₂). Using an ultrahigh magnetic field of 500 T, the researchers induced a metallic state in the insulating phase of W-doped VO₂. This transition is attributed to the spin Zeeman effect on the d electrons of V ions, which disrupts the vanadium dimers responsible for the insulating behavior. The results suggest that structural instability, rather than electron correlation, is the primary driving force behind the MI transition in VO₂.
Publisher
Nature Communications
Published On
Jul 17, 2020
Authors
Yasuhiro H. Matsuda, Daisuke Nakamura, Akihiko Ikeda, Shojiro Takeyama, Yuki Suga, Hayato Nakahara, Yuji Muraoka
Tags
metal-insulator transition
tungsten-doped vanadium dioxide
ultrahigh magnetic field
spin Zeeman effect
vanadium dimers
structural instability
electron correlation

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