<abstract xmlns="http://www.w3.org/1999/xhtml"> We have studied the band structure and the band gap closure of TlInSe2 under pressure in the range of 0 GPa to 21 GPa, by employing the first-principles method based on the density functional theory. We discuss the possible metallic transition in the tetragonal phase of TlInSe2 crystal. Our calculation results show that the value of the pressure at the crossover from the direct to the indirect gap is found to be 8 GPa. The “semiconductor-metal” transition is determined to occur at 14 GPa. The study of the pressure effect on the effective masses for semiconductor state shows that with increasing pressure, the effective masses of holes and electrons decrease and the anisotropy of effective masses of holes is weakening.</abstract>

We have studied the band structure and the band gap closure of TlInSe2 under pressure in the range of 0 GPa to 21 GPa, by employing the first-principles method based on the density functional theory. We discuss the possible metallic transition in the tetragonal phase of TlInSe2 crystal. Our calculation results show that the value of the pressure at the crossover from the direct to the indirect gap is found to be 8 GPa. The “semiconductor-metal” transition is determined to occur at 14 GPa. The study of the pressure effect on the effective masses for semiconductor state shows that with increasing pressure, the effective masses of holes and electrons decrease and the anisotropy of effective masses of holes is weakening.

Electronic structure and effective masses of TlInSe2 under pressure

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Electronic structure and effective masses of TlInSe under pressure

We have studied the band structure and the band gap closure of TlInSe2 under pressure in the range of 0 GPa to 21 GPa, by employing the first-principles method...

Electronic structure and effective masses of TlInSe₂ under pressure

Online veröffentlicht: 21. März 2018

Seitenbereich: 857 - 860

Eingereicht: 27. Mai 2017

Akzeptiert: 21. Jan. 2018

DOI: https://doi.org/10.1515/msp-2018-0007

Schlüsselwörter
Density Functional Theory, metallic transition, General Gradient Approximation, band structure

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Electronic structure and effective masses of TlInSe2 under pressure

Online veröffentlicht: 21. März 2018

Seitenbereich: 857 - 860

Eingereicht: 27. Mai 2017

Akzeptiert: 21. Jan. 2018

DOI: https://doi.org/10.1515/msp-2018-0007

SchlüsselwörterDensity Functional Theory, metallic transition, General Gradient Approximation, band structure

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Electronic structure and effective masses of TlInSe₂ under pressure

Schlüsselwörter
Density Functional Theory, metallic transition, General Gradient Approximation, band structure