Study of anomalous electronic phenomena in phase boundary/coexistence phase using commercially available laser ultrahigh resolution photoemission spectroscopy

建立了商品化的激光光电子发射系统，获得了370ueV的能量分辨率，使我们能够测量Nb和V3Si的超导带隙。首次用商用激光器实现了能量分辨率优于1 meV。该系统可以很容易地实现180ueV的能量分辨率。此外，我还在世界上首次成功地观测到了k-(BEDT-TTf)_2Cu(NCS)_2的超导带隙。

I have constructed commercially available laser photoemission system and achieved 370 ueV of energy resolution that enables us to measure superconducting gap of niobium and V3Si. It is first time to realize the energy resolution better than 1meV using commercially available laser. 180 ueV of energy resolution is easily realized using this system. Additionally, I have succeeded to observe the superconducting gap of k-(BEDT -TTF)_2Cu(NCS)_2 for the first time in the world.