Extended Data Fig. 3: Quasiparticle interference imaging of the electron pocket around Γ.
From: Cascade of correlated electron states in the kagome superconductor CsV3Sb5
(a-f) Differential conductance (dI/dV(r, V)) maps over the same region of the sample used for the analysis of the dispersion in Fig. 2, and (g-l) corresponding Fourier transforms (FTs). Green, brown and blue circles denote the atomic Bragg peaks, 2a0 charge ordering peaks q2a0-CO and unidirectional stripe charge order peaks q4a0-CO in momentum-transfer space, respectively. The red and orange arrows indicate the QPI wave vectors that we attribute to the intra-electron pocket scattering around Γ. (m) Radially-averaged FT linecut as a function of STM bias V showing the presence of q1 across Fermi energy. STM setup condition: (a) Vsample = −400 mV, Iset = 800pA, Vexc = 5 mV; (b) Vsample = −300 mV, Iset = 600 pA, Vexc = 4 mV; (c) Vsample = −200 mV, Iset = 400 pA, Vexc = 4 mV; (d) Vsample = −100 mV, Iset = 200 pA, Vexc = 4 mV; (e) Vsample = −50 mV, Iset = 100 pA, Vexc = 4 mV; (f) Vsample = 200 mV, Iset = 400 pA, Vexc = 4 mV; (m) Vsample = 10 mV, Iset = 100 pA, Vexc = 1 mV; T = 4.5 K.
