"We demonstrate how the apparent magnetic field induced lattice and CDW intensity change can be explained as a consequence of two independent experimental artifacts: a reconfiguration of atoms at the STM tip apex that alters the amplitudes of CDW modulations, and piezo creep, hysteresis and thermal drift, which artificially distort STM topographs."
"We argue that the reported piezomagnetism could be attributed to experimental artifacts rather than an intrinsic magnetic-field-induced change of the sample."
Previous studies of kagome superconductor RbV3Sb5 reported magnetic-field-dependent changes in charge density wave chirality and lattice constants using scanning tunneling microscopy. This analysis demonstrates these observations arise from experimental artifacts rather than genuine material responses. Two primary artifacts are identified: reconfiguration of atoms at the STM tip apex alters apparent charge density wave modulation amplitudes, and piezo creep, hysteresis, and thermal drift distort STM topographs and lattice constant measurements. The apparent piezomagnetism attributed to field-induced sample changes can be explained through these instrumental limitations, suggesting previous conclusions about intrinsic magnetic-field effects require reconsideration.
#kagome-superconductors #charge-density-waves #scanning-tunneling-microscopy-artifacts #experimental-methodology #rbv3sb5
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