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Papers by HIROAKI MATSUI
Journal of the Physical Society of Japan, 2004
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) with synchrot... more We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe 2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (k z) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific k z-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe 2 is driven by three-dimensional Fermi-surface nesting.
Journal of the Physical Society of Japan, 2004
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) with synchrot... more We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe 2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (k z) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific k z-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe 2 is driven by three-dimensional Fermi-surface nesting.