*Article* **Field-Angle Dependence of Interlayer Magnetoresistance in Organic Dirac Electron System** *α***-(BEDT-TTF)2I3**

#### **Takehiro Tani 1,***∗***, Naoya Tajima 2 and Akito Kobayashi 1**


#### Received: 11 March 2019; Accepted: 16 April 2019; Published: 19 April 2019

**Abstract:** The effect of the Coulomb interaction in interlayer magnetoresistance is elucidated in collaboration with theory and experiments for the Dirac electron system in organic conductor *α*-(BEDT-TTF)2I3 under a strong magnetic field. It is found that the effective *g*-factor enhanced by Coulomb interaction depends on the angle of the magnetic field, resulting in the field-angle dependence of a characteristic magnetic field in which interlayer resistance has a minimum due to spin splitting *N* = 0 Landau levels. The qualitative agreemen<sup>t</sup> between the theory and experimental results for the field-angle dependence of interlayer magnetoresistance is obtained.

**Keywords:** Dirac electron; Landau level; interlayer magnetoresistance; organic conductor; *α*-(BEDT-TTF)2I3
