scholarly journals Effects of Carrier Doping on the Transport in the Dirac Electron System α-(BEDT-TTF)2I3 under High Pressure

Crystals ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 126 ◽  
Author(s):  
Naoya Tajima
Keyword(s):  
High Pressure ◽  
Electron System ◽  
Dirac Electron ◽  
Carrier Doping

Emergence of the Dirac Electron System in a Single-Component Molecular Conductor under High Pressure

2017 ◽  
Vol 139 (5) ◽  
pp. 1770-1773 ◽  
Author(s):  
Reizo Kato ◽  
HengBo Cui ◽  
Takao Tsumuraya ◽  
Tsuyoshi Miyazaki ◽  
Yoshikazu Suzumura
Keyword(s):  
High Pressure ◽  
Electron System ◽  
Single Component ◽  
Molecular Conductor ◽  
Dirac Electron

scholarly journals High-Pressure Crystal Structure and Unusual Magnetoresistance of a Single-Component Molecular Conductor [Pd(dddt)2] (dddt = 5,6-dihydro-1,4-dithiin-2,3-dithiolate)

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 534
Author(s):  
Hengbo Cui ◽  
Hamish H.-M. Yeung ◽  
Yoshitaka Kawasugi ◽  
Takaaki Minamidate ◽  
Lucy K. Saunders ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Three Dimensional ◽  
Structural Disorder ◽  
Electron System ◽  
Experimental Information ◽  
Crystal Structure Analysis ◽  
Single Component ◽  
Unusual Behavior ◽  
Dirac Electron

A single-component molecular crystal [Pd(dddt)2] has been shown to exhibit almost temperature-independent resistivity under high pressure, leading theoretical studies to propose it as a three-dimensional (3D) Dirac electron system. To obtain more experimental information about the high-pressure electronic states, detailed resistivity measurements were performed, which show temperature-independent behavior at 13 GPa and then an upturn in the low temperature region at higher pressures. High-pressure single-crystal structure analysis was also performed for the first time, revealing the presence of pressure-induced structural disorder, which is possibly related to the changes in resistivity in the higher-pressure region. Calculations based on the disordered structure reveal that the Dirac cone state and semiconducting state coexist, indicating that the electronic state at high pressure is not a simple Dirac electron system as previously believed. Finally, the first measurements of magnetoresistance on [Pd(dddt)2] under high pressure are reported, revealing unusual behavior that seems to originate from the Dirac electron state.

scholarly journals Ambient-pressure Dirac electron system in the quasi-two-dimensional molecular conductor α−(BETS)2I3

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Shunsuke Kitou ◽  
Takao Tsumuraya ◽  
Hikaru Sawahata ◽  
Fumiyuki Ishii ◽  
Ko-ichi Hiraki ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Electron System ◽  
Two Dimensional ◽  
Molecular Conductor ◽  
Dirac Electron

Single-component molecular conductor [Pt(dmdt)2]—a three-dimensional ambient-pressure molecular Dirac electron system

2019 ◽  
Vol 55 (23) ◽  
pp. 3327-3330 ◽  
Author(s):  
Biao Zhou ◽  
Shoji Ishibashi ◽  
Tatsuru Ishii ◽  
Takahiko Sekine ◽  
Ryosuke Takehara ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Three Dimensional ◽  
Electron System ◽  
Single Component ◽  
Nodal Lines ◽  
Molecular Conductor ◽  
System P ◽  
Dirac Electron

[Pt(dmdt)2], an air-stable single-component molecular conductor, contains massless Dirac electrons and carries Dirac nodal lines at ambient pressure.

scholarly journals Large Diamagnetism and Electromagnetic Duality in Two-Dimensional Dirac Electron System

2022 ◽  
Vol 128 (2) ◽  
Author(s):  
S. Fujiyama ◽  
H. Maebashi ◽  
N. Tajima ◽  
T. Tsumuraya ◽  
H-B. Cui ◽  
...  
Keyword(s):  
Electron System ◽  
Two Dimensional ◽  
Dirac Electron

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

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 212 ◽  
Author(s):  
Takehiro Tani ◽  
Naoya Tajima ◽  
Akito Kobayashi
Keyword(s):  
Magnetic Field ◽  
Coulomb Interaction ◽  
Electron System ◽  
Landau Levels ◽  
Spin Splitting ◽  
Organic Conductor ◽  
Angle Dependence ◽  
Dirac Electron ◽  
The Magnetic Field ◽  
Theory And Experiments

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) 2 I 3 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 agreement between the theory and experimental results for the field-angle dependence of interlayer magnetoresistance is obtained.

Sign in / Sign up

Export Citation Format

Share Document