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arXiv · 1808.00858

Non-Classical Longitudinal Magneto-Resistance in Anisotropic Black Phosphorus

Francesca Telesio·Nicholas Hemsworth·William Dickerson·Matei Petrescu·Vahid Tayari·Oulin Yu·David Graf·Manuel Serrano-Ruiz·Maria Caporali·Maurizio Peruzzini·Matteo Carrega·Thomas Szkopek·Stefan Heun·Guillaume Gervais
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Abstract

Resistivity measurements of a few-layer black phosphorus (bP) crystal in parallel magnetic fields up to 45 T are reported as a function of the angle between the in-plane field and the source-drain (S-D) axis of the device. The crystallographic directions of the bP crystal were determined by Raman spectroscopy, with the zigzag axis found within 5{\deg} of the S-D axis, and the armchair axis in the orthogonal planar direction. A transverse magneto-resistance (TMR) as well as a classically-forbidden longitudinal magneto-resistance (LMR) are observed. Both are found to be strongly anisotropic and non-monotonic with increasing in-plane field. Surprisingly, the relative magnitude (in %) of the positive LMR is larger than the TMR above $\sim$32 T. Considering the known anisotropy of bP whose zigzag and armchair effective masses differ by a factor of approximately seven, our experiment strongly suggests this LMR to be a consequence of the anisotropic Fermi surface of bP.

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Francesca Telesio, Nicholas Hemsworth, William Dickerson, Matei Petrescu, Vahid Tayari, Oulin Yu, David Graf, Manuel Serrano-Ruiz, Maria Caporali, Maurizio Peruzzini, Matteo Carrega, Thomas Szkopek, Stefan Heun, Guillaume Gervais. 2018-08-02. Non-Classical Longitudinal Magneto-Resistance in Anisotropic Black Phosphorus. https://doi.org/10.1002/pssr.201900347

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