CR measurement of Dirac-cone state realized in 2D organic conductor under high pressure

本研究的目的是得到直接的实验证据，狄拉克锥在二维导体在高压下超过1.5 GPa，这是预测的理论Suzumura群。狄拉克锥态是凝聚态物理学中的新概念，有望在高压下实现。然而，为了对其进行直接观测，我们开发了新系统，包括压力单元的开发，这使得电磁波在THz区域的传输成为可能，因为测量需要在高压，低温和高磁场等多种极端条件下对电磁波进行吸收测量。我们已经成功地开发了系统，使测量在1.5 GPa，4.2K，10 T和频率超过400 GHz。现在我们可以进行直接测量，预计在不久的将来会有结果。

The aim of this study is to get the direct experimental evidence of Dirac cone satae in 2 dimensional conductor under high pressure beyond 1.5 GPa, which is predicted by the theory of Suzumura group. The Dirac cone state, which is expected to realize under high pressure, is the new concept in condensed matter physics. However, in order to make the direct observation of it, we developed the new system including the development of pressure cell, which enables the transmission of electro-magnetic wave in the THz region because the measurement requires the absorption measurement of the electro-magnetic wave under multi-extreme conditions, such as high pressure, low temperature and high magnetic field. We have succeeded in developing the system which enables the measurement under 1.5 GPa, 4.2K, 10T and frequency beyond 400 GHz. Now we are in the position to make the direct measurement, and the result is expected in near future.