Fig. 4: Magnetic tunability of the electronic density-of-states and the density wave modulations.
From: Discovery of magnetic-field-tunable density modulations and spin tilting in a layered altermagnet
a Difference in spectra (Δ(dI/dV)) defined as the spectrum at some field subtracted from the first 0 T measurement taken (\(dI/dV({B}_{z})-dI/dV(0T\,({1}^{st}))\). Spectra were acquired with a spin-polarized tip. b Same as (a), but with data acquired with a non-spin-polarized tip. c–e Intensity of the 2a0 peaks in Fourier space as a function of sample bias for different magnetic fields along \({{{\bf{q}}}}_{2a0}^{1}\), \({{{\bf{q}}}}_{2a0}^{2}\), and \({{{\bf{q}}}}_{2a0}^{3}\), respectively acquired with a spin-polarized tip. f-h, The same as (c–e), but with data acquired with a non-spin-polarized tip. A pedagogical cartoon demonstrating a possible spin-canting scenario in i no field, j weak field, k stronger field to explain the behavior seen in (c–e). STM setup conditions: a Vsample = 100 mV, Iset = 300 pA, Vexc = 2 mV (rms); b Vsample = 100 mV, Iset = 300 pA, Vexc = 2 mV (rms); c–e Vsample = 50 mV, Iset = 150 pA, Vexc = 5 mV (rms); f–h Vsample = 50 mV, Iset = 150 pA, Vexc = 5 mV (rms).
