Abstract

Temperature-linear resistance at low temperatures in strange metals is an exotic characteristic of strong correlation systems, as observed in high-Tc superconducting cuprates, heavy fermions, Fe-based superconductors, ruthenates, and twisted bilayer graphene. Here, we introduce a hole-doped valley-spin insulator, V-doped WSe2, with hole pockets in the valence band. The strange metal characteristic was observed in VxW₁-xSe₂ at a critical carrier concentration of 9.5 x 10²⁰ cm⁻³ from 150 K to 1.8 K. The unsaturated magnetoresistance is almost linearly proportional to the magnetic field. Using the ansatz R(H,T) - R(0,0) ∝√((αkBT)²+(γμBB)²), the γ/α ratio is estimated approximately to 4, distinct from that for the quasiparticles of LSCO, BaFe₂(As₁-xPx)2 (γ/α=1) and bosons of YBCO (γ/α=2). Our observation opens up the possible routes that induce strong correlation and superconductivity in two-dimensional materials with the strong spin-orbit coupling.

Abstract

Temperature-linear resistance at low temperatures in strange metals is an exotic characteristic of strong correlation systems, as observed in high-Tc superconducting cuprates, heavy fermions, Fe-based superconductors, ruthenates, and twisted bilayer graphene. Here, we introduce a hole-doped valley-spin insulator, V-doped WSe2, with hole pockets in the valence band. The strange metal characteristic was observed in VxW₁-xSe₂ at a critical carrier concentration of 9.5 x 10²⁰ cm⁻³ from 150 K to 1.8 K. The unsaturated magnetoresistance is almost linearly proportional to the magnetic field. Using the ansatz R(H,T) - R(0,0) ∝√((αkBT)²+(γμBB)²), the γ/α ratio is estimated approximately to 4, distinct from that for the quasiparticles of LSCO, BaFe₂(As₁-xPx)2 (γ/α=1) and bosons of YBCO (γ/α=2). Our observation opens up the possible routes that induce strong correlation and superconductivity in two-dimensional materials with the strong spin-orbit coupling.

Abstract

Temperature-linear resistance at low temperatures in strange metals is an exotic characteristic of strong correlation systems, as observed in high-Tc superconducting cuprates, heavy fermions, Fe-based superconductors, ruthenates, and twisted bilayer graphene. Here, we introduce a hole-doped valley-spin insulator, V-doped WSe2, with hole pockets in the valence band. The strange metal characteristic was observed in VxW₁-xSe₂ at a critical carrier concentration of 9.5 x 10²⁰ cm⁻³ from 150 K to 1.8 K. The unsaturated magnetoresistance is almost linearly proportional to the magnetic field. Using the ansatz R(H,T) - R(0,0) ∝√((αkBT)²+(γμBB)²), the γ/α ratio is estimated approximately to 4, distinct from that for the quasiparticles of LSCO, BaFe₂(As₁-xPx)2 (γ/α=1) and bosons of YBCO (γ/α=2). Our observation opens up the possible routes that induce strong correlation and superconductivity in two-dimensional materials with the strong spin-orbit coupling.

Abstract

Temperature-linear resistance at low temperatures in strange metals is an exotic characteristic of strong correlation systems, as observed in high-Tc superconducting cuprates, heavy fermions, Fe-based superconductors, ruthenates, and twisted bilayer graphene. Here, we introduce a hole-doped valley-spin insulator, V-doped WSe2, with hole pockets in the valence band. The strange metal characteristic was observed in VxW₁-xSe₂ at a critical carrier concentration of 9.5 x 10²⁰ cm⁻³ from 150 K to 1.8 K. The unsaturated magnetoresistance is almost linearly proportional to the magnetic field. Using the ansatz R(H,T) - R(0,0) ∝√((αkBT)²+(γμBB)²), the γ/α ratio is estimated approximately to 4, distinct from that for the quasiparticles of LSCO, BaFe₂(As₁-xPx)2 (γ/α=1) and bosons of YBCO (γ/α=2). Our observation opens up the possible routes that induce strong correlation and superconductivity in two-dimensional materials with the strong spin-orbit coupling.