Visualizing the effect of structural supermodulation on electronic structure of by scanning tunneling spectroscopy
T Machida, Y Fujisawa, K Igarashi, A Kaneko, S Ooi… - Physical Review B, 2013 - APS
T Machida, Y Fujisawa, K Igarashi, A Kaneko, S Ooi, T Mochiku, M Tachiki, K Komori…
Physical Review B, 2013•APSWe report on the scanning tunneling spectroscopy experiments on single crystals of IrTe 2. A
structural supermodulation and a local density-of-states (LDOS) modulation with a wave
vector of q= 1/5× 2 π/a 0 (a 0 is the lattice constant in the ab plane) have been observed at
4.2 K, where the sample is in the monoclinic phase. As synchronized with the
supermodulation, the LDOS spatially modulates within two energy ranges (below− 200 meV
and around− 100 meV). We further investigated the effect of the local perturbations including …
structural supermodulation and a local density-of-states (LDOS) modulation with a wave
vector of q= 1/5× 2 π/a 0 (a 0 is the lattice constant in the ab plane) have been observed at
4.2 K, where the sample is in the monoclinic phase. As synchronized with the
supermodulation, the LDOS spatially modulates within two energy ranges (below− 200 meV
and around− 100 meV). We further investigated the effect of the local perturbations including …
We report on the scanning tunneling spectroscopy experiments on single crystals of IrTe. A structural supermodulation and a local density-of-states (LDOS) modulation with a wave vector of ( is the lattice constant in the plane) have been observed at 4.2 K, where the sample is in the monoclinic phase. As synchronized with the supermodulation, the LDOS spatially modulates within two energy ranges (below 200 meV and around 100 meV). We further investigated the effect of the local perturbations including the antiphase boundaries and the twin boundaries on the LDOS. These perturbations also modify the LDOS below 200 meV and around 100 meV, even though the lattice distortions induced by these perturbations appear to be different from those by the supermodulation. Our results indicating several microscopic structural effects on the LDOS seem to offer crucial keys for the establishment of the microscopic model describing the parent state.
American Physical Society