Power-law Conductivity inside the Mott gap: application to $\kappa-(BEDT-TTF)_2Cu_2(CN)_3$

The charge dynamics of spin-liquid states described by U(1) gauge theory coupling to fermionic spinons is discussed in this paper. We find that the gapless spinons give rise to a power law optical conductivity inside the charge gap. The theory is applied to explain the unusual optical conductivity observed recently in the organic compound $κ - (B E D T - T T F)_{2} C u_{2} (C N)_{3}$ . We also propose an optical experiment to search for the in-gap excitations in the Kagome spin liquid insulator.

Power-law Conductivity inside the Mott gap: application to $κ - (B E D T - T T F)_{2} C u_{2} (C N)_{3}$

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Power-law Conductivity inside the Mott gap: application to $κ - (B E D T - T T F)_{2} C u_{2} (C N)_{3}$

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Power-law Conductivity inside the Mott gap: application to κ−(BEDT−TTF)2Cu2(CN)3κ−(BEDT−TTF)2​Cu2​(CN)3​

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Power-law Conductivity inside the Mott gap: application to κ−(BEDT−TTF)2Cu2(CN)3κ−(BEDT−TTF)2​Cu2​(CN)3​

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Power-law Conductivity inside the Mott gap: application to $κ - (B E D T - T T F)_{2} C u_{2} (C N)_{3}$

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Power-law Conductivity inside the Mott gap: application to $κ - (B E D T - T T F)_{2} C u_{2} (C N)_{3}$

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AI智能校验