TY - JOUR

T1 - Hydrostatic deformation potentials of narrow-gap HgCdTe

AU - Szoła, Maria

AU - Ivonyak, Yurii

AU - Przybytek, Jacek

AU - Mikhailov, Nikolai

AU - Dvoretsky, Sergey

AU - Teppe, Frédéric

AU - Knap, Wojciech

N1 - Funding Information: We would like to express our gratitude to S. S. Krishtopenko for his theoretical support and to our colleagues J. Łusakowski and K. Karpierz who provided insight and expertise that greatly assisted this research. We also thank I. Yahniuk for assistance with preparing the indium contacts. This work was supported by CENTERA Laboratories in the frame of the International Research Agendas program for the Foundation for Polish Sciences co-financed by the European Union under the European Regional Development Fund (No. MAB/2018/9). This work was also supported by the Terahertz Occitanie Platform, by the CNRS through IRP “TeraMIR”, by the French Agence Nationale pour la Recherche for Colector (ANR-19-CE30-0032), Dirac3D (ANR-17-CE30-0023) and Equipex+ Hybat (ANR-21-ESRE-0026) projects. Publisher Copyright: © 2022 American Physical Society.

PY - 2022/11/15

Y1 - 2022/11/15

N2 - Close to the semimetal-to-semiconductor topological phase transition, the band structure of HgCdTe is represented by massive Kane fermions that, in a semirelativistic approach, are characterized by two parameters: rest mass and velocity. Using terahertz magneto-optical spectroscopy, we explore the band structure evolution of HgCdTe films with hydrostatic pressure in the vicinity of the band-gap collapse. By analyzing the energies of interband optical transitions as a function of magnetic field, we have determined the rest mass of Kane fermions at different hydrostatic pressures. The pressure dependence of the rest mass allows us to obtain the hydrostatic deformation potential ac-av at low temperature, where ac and av are the deformation potentials of the conduction and valence bands, respectively.

AB - Close to the semimetal-to-semiconductor topological phase transition, the band structure of HgCdTe is represented by massive Kane fermions that, in a semirelativistic approach, are characterized by two parameters: rest mass and velocity. Using terahertz magneto-optical spectroscopy, we explore the band structure evolution of HgCdTe films with hydrostatic pressure in the vicinity of the band-gap collapse. By analyzing the energies of interband optical transitions as a function of magnetic field, we have determined the rest mass of Kane fermions at different hydrostatic pressures. The pressure dependence of the rest mass allows us to obtain the hydrostatic deformation potential ac-av at low temperature, where ac and av are the deformation potentials of the conduction and valence bands, respectively.

UR - http://www.scopus.com/inward/record.url?scp=85141925478&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a050ecc8-faf4-3b3f-a01c-24c3eef163bc/

U2 - 10.1103/PhysRevB.106.195202

DO - 10.1103/PhysRevB.106.195202

M3 - Article

AN - SCOPUS:85141925478

VL - 106

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 19

M1 - 195202

ER -