TY - JOUR

T1 - Interaction-dominated transport in two-dimensional conductors: From degenerate to partially degenerate regime

AU - Gusev, G. M.

AU - Levin, A. D.

AU - Olshanetsky, E. B.

AU - Kvon, Z. D.

AU - Kovalev, V. M.

AU - Entin, M. V.

AU - Mikhailov, N. N.

N1 - This work is supported by FAPESP (São Paulo Research Foundation) Grants No. 2019/16736-2 and No. 2021/12470- 8, CNPq (National Council for Scientific and Technological Development), and by the Ministry of Science and Higher Education of the Russian Federation and Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS.”

PY - 2024/4/25

Y1 - 2024/4/25

N2 - In this study, we investigate the conductivity of a two-dimensional (2D) system in HgTe quantum well comprising two types of carriers with linear and quadratic spectra, respectively. The interactions between the two-dimensional Dirac holes and the heavy holes lead to the breakdown of Galilean invariance, resulting in interaction-limited resistivity. Our exploration of the transport properties spans from low temperatures, where both subsystems are fully degenerate, to higher temperatures, where the Dirac holes remain degenerate while the heavy holes follow Boltzmann statistics, creating a partially degenerate regime. Through a developed theory, we successfully predict the behavior of resistivity as ρ∼T2 and ρ∼T3 for the fully degenerate and partially degenerate regimes, respectively, which is in reasonable agreement with experimental observations. Notably, at elevated temperatures, the interaction-limited resistivity surpasses the resistivity caused by impurity scattering by a factor of 5-6. These findings imply that the investigated system serves as a versatile experimental platform for exploring various interaction-limited transport regimes in two component plasma.

AB - In this study, we investigate the conductivity of a two-dimensional (2D) system in HgTe quantum well comprising two types of carriers with linear and quadratic spectra, respectively. The interactions between the two-dimensional Dirac holes and the heavy holes lead to the breakdown of Galilean invariance, resulting in interaction-limited resistivity. Our exploration of the transport properties spans from low temperatures, where both subsystems are fully degenerate, to higher temperatures, where the Dirac holes remain degenerate while the heavy holes follow Boltzmann statistics, creating a partially degenerate regime. Through a developed theory, we successfully predict the behavior of resistivity as ρ∼T2 and ρ∼T3 for the fully degenerate and partially degenerate regimes, respectively, which is in reasonable agreement with experimental observations. Notably, at elevated temperatures, the interaction-limited resistivity surpasses the resistivity caused by impurity scattering by a factor of 5-6. These findings imply that the investigated system serves as a versatile experimental platform for exploring various interaction-limited transport regimes in two component plasma.

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001173877500004

UR - https://www.mendeley.com/catalogue/ed142bb0-ad6c-3e3b-921d-ec16226c6376/

U2 - 10.1103/PhysRevB.109.035302

DO - 10.1103/PhysRevB.109.035302

M3 - Article

VL - 109

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 3

M1 - 035302

ER -