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This research aims to explore the many-particle properties of a two-band Hubbard model in the CDW-Mott phase of 2H-TaSe2.

March 15, 2026The European Physical Journal B0 citationsOpen Access

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Theory of two-band metallicity from correlation plus site-diagonal disorder in the CDW-Mott phase of 2H-TaSe₂

LCL. CracoLeibniz Institute for Solid State and Materials Research

Key Points

This research aims to explore the many-particle properties of a two-band Hubbard model in the CDW-Mott phase of 2H-TaSe2.
Utilized dynamical mean-field theory (DMFT) to analyze the system.
Investigated effects of site-diagonal disorder on the correlated metallic state.
Examined electronic reconstruction associated with the CDW-Mott transition.
Revealed distinct many-particle excitations due to site-diagonal disorder.
Demonstrated the Mott–Anderson characteristics of charge carriers in the phase.
Showed the emergence of a correlated metallic state from the CDW-Mott regime.

Abstract

Abstract Using dynamical mean-field theory (DMFT), we explore the many-particle properties of an extended two-band Hubbard model applicable to 2 H -TaSe ₂ 2 superconductor. We reveal the electronic reconstruction of the CDW-Mott state driven by site-diagonal disorder with distinct many-particle excitations. Our results offer new microscopic theory insights into the Mott–Anderson nature of charge carriers and the correlated metallic state which emerges from site-diagonal disorder within the CDW-Mott regime. Graphical abstract

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Theory of two-band metallicity from correlation plus site-diagonal disorder in the CDW-Mott phase of 2H-TaSe₂

Key Points

Abstract

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