Investigating the pseudogap critical point of the cuprate superconductor Bi2201

Recent measurements of the resistivity and Hall coefficient in cuprates at high magnetic fields have revealed a new signature of the critical point p* where the pseudogap phase ends at T=0 in the absence of superconductivity: the carrier density drops abruptly from n = 1+p above p* to n = p below p* [1,2,3].
Here we report on our investigation of such a signature in the cuprate superconductor Bi2201, whose pseudogap critical point has been located through NMR [4] and ARPES [5] studies.
We report the findings of our measurements of several transport coefficients in overdoped samples of Bi2201 in magnetic fields large enough to access the normal state in the T=0 limit.

[1] S. Badoux et al., Nature, 531, 210 (2016).
[2] F. Laliberté et al., arXiv:160604491 (2016).
[3] C. Collignon et al., Phys. Rev. B 95, 224517 (2017).
[4] S. Kawasaki et al., Phys. Rev. Lett. 105, 137002 (2010).
[5] T. Kondo et al., Nat. Phys. 7, 21 (2011).