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Temperature dependent Luttinger surfaces

T. Ito·A. Chainani·T. Haruna·K. Kanai·T. Yokoya·S. Shin·R. Kato
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Abstract

The Luttinger surface of an organic metal (TTF-TCNQ), possessing charge order and spin-charge separation, is investigated using temperature dependent angle-resolved photoemission spectroscopy. The Luttinger surface topology, obtained from momentum distribution curves, changes from quasi-2D(dimensional) to quasi-1D with temperature. The high temperature quasi-2D surface exhibits 4$k_F$ charge-density-wave (CDW) superstructure in the TCNQ derived holon band, in the absence of 2$k_F$ order. Decreasing temperature results in quasi-1D nested 2$k_F$ CDW order in the TCNQ spinon band and in the TTF surface. The results establish the link in momentum-space between charge order and spin-charge separation in a Luttinger liquid.

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T. Ito, A. Chainani, T. Haruna, K. Kanai, T. Yokoya, S. Shin, R. Kato. 2005-07-14. Temperature dependent Luttinger surfaces. https://doi.org/10.1103/physrevlett.95.246402

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