Professional Education

  • Master of Science, University of Bristol (2010)
  • Doctor of Philosophy, University of Bristol (2014)

Stanford Advisors

All Publications

  • Determination of the resistivity anisotropy of orthorhombic materials via transverse resistivity measurements REVIEW OF SCIENTIFIC INSTRUMENTS Walmsley, P., Fisher, I. R. 2017; 88 (4)


    Measurements of the resistivity anisotropy can provide crucial information about the electronic structure and scattering processes in anisotropic and low-dimensional materials, but quantitative measurements by conventional means often suffer very significant systematic errors. Here we describe a novel approach to measuring the resistivity anisotropy of orthorhombic materials, using a single crystal and a single measurement that is derived from a π4 rotation of the measurement frame relative to the crystallographic axes. In this new basis, the transverse resistivity gives a direct measurement of the resistivity anisotropy, which combined with the longitudinal resistivity also gives the in-plane elements of the conventional resistivity tensor via a 5-point contact geometry. This is demonstrated through application to the charge-density wave compound ErTe3, and it is concluded that this method presents a significant improvement on existing techniques, particularly when measuring small anisotropies.

    View details for DOI 10.1063/1.4978908

    View details for Web of Science ID 000400392800024

    View details for PubMedID 28456271

  • Fermi surface evolution of Na-doped PbTe studied through density functional theory calculations and Shubnikov-de Haas measurements PHYSICAL REVIEW B Giraldo-Gallo, P., Sangiorgio, B., Walmsley, P., Silverstein, H. J., Fechner, M., Riggs, S. C., Geballe, T. H., Spaldin, N. A., Fisher, I. R. 2016; 94 (19)
  • Multiple charge density wave states at the surface of TbTe3 PHYSICAL REVIEW B Fu, L., Kraft, A. M., Sharma, B., Singh, M., Walmsley, P., Fisher, I. R., Boyer, M. C. 2016; 94 (20)