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  Nonintrinsic origin of the magnetic-field-induced metal-insulator and electronic phase transitions in graphite

Barzola-Quiquia, J., Esquinazi, P. D., Precker, C. E., Stiller, M., Zoraghi, M., Förster, T., et al. (2019). Nonintrinsic origin of the magnetic-field-induced metal-insulator and electronic phase transitions in graphite. arXiv.

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Barzola-Quiquia_Preprint_2019.pdf (Preprint), 6MB
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Barzola-Quiquia, José 1, Author
Esquinazi, Pablo D. 1, Author
Precker, Christian E. 1, Author
Stiller, Markus1, Author
Zoraghi, Mahsa1, Author              
Förster, Tobias 1, Author
Herrmannsdörfer, Thomas 1, Author
Coniglio, William A. 1, Author
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1External Organizations, ou_persistent22              

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 Abstract: A detailed magnetoresistance study of bulk and microflake samples of highly oriented pyrolytic graphite with a thickness of 25 μm to 23~nm reveals that the usually observed field-induced metal-insulator and electronic phase transitions vanish in thinner samples. The observed suppression is accompanied by orders of magnitude decrease of the magnetoresistance and of the amplitude of the Shubnikov-de-Haas oscillations. The overall behavior is related to the decrease in the quantity of two-dimensional interfaces between crystalline regions of the same and different stacking orders present in graphite samples. Our results indicate that these field-induced transitions are not intrinsic to the ideal graphite structure and, therefore, a relevant portion of the published interpretations should be reconsidered.

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Language(s): eng - English
 Dates: 2019-02-012019-02-04
 Publication Status: Published online
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 Rev. Type: No review
 Identifiers: arXiv: 1902.00405
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Title: arXiv
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