%0 Journal Article %1 li2017metalinsulator %A Li, Weiwu %A Rose, Eva %A Tran, Minh Vu %A Hübner, Ralph %A Łapiński, Andrzej %A Świetlik, Roman %A Torunova, Svetlana A. %A Zhilyaeva, Elena I. %A Lyubovskaya, Rimma N. %A Dressel, Martin %B The Journal of Chemical Physics %D 2017 %I American Institute of Physics %J The Journal of Chemical Physics %K transition β″-(BEDT-TTF)2Hg(SCN)2Cl %N 6 %P 064503 %R 10.1063/1.4997198 %T The metal-insulator transition in the organic conductor β″-(BEDT-TTF)2Hg(SCN)2Cl %U https://doi.org/10.1063/1.4997198 %V 147 %X We explore the nature of the metal-insulator transition in the two-dimensional organic compound β″-(BEDT-TTF)2Hg(SCN)2Cl by x-ray, electrical transport, ESR, Raman, and infrared investigations. Magnetic and vibrational spectroscopy concurrently reveal a gradual dimerization along the stacking direction (a−b), setting in already at the crossover temperature of 150 K from the metallic to the insulating state. A spin gap of Δσ=47 meV is extracted. From the activated resistivity behavior below T = 55 K, a charge gap of Δρ=60 meV is derived. At TCO = 72 K, the C=C vibrational modes reveal the development of a charge-ordered state with a charge disproportionation of 2δρ=0.34e. In addition to a slight structural dimerization, charge-order causes stripes most likely perpendicular to the stacks.

@article{li2017metalinsulator, abstract = {We explore the nature of the metal-insulator transition in the two-dimensional organic compound β″-(BEDT-TTF)2Hg(SCN)2Cl by x-ray, electrical transport, ESR, Raman, and infrared investigations. Magnetic and vibrational spectroscopy concurrently reveal a gradual dimerization along the stacking direction (a−b), setting in already at the crossover temperature of 150 K from the metallic to the insulating state. A spin gap of Δσ=47 meV is extracted. From the activated resistivity behavior below T = 55 K, a charge gap of Δρ=60 meV is derived. At TCO = 72 K, the C=C vibrational modes reveal the development of a charge-ordered state with a charge disproportionation of 2δρ=0.34e. In addition to a slight structural dimerization, charge-order causes stripes most likely perpendicular to the stacks.}, added-at = {2018-01-29T14:01:06.000+0100}, author = {Li, Weiwu and Rose, Eva and Tran, Minh Vu and Hübner, Ralph and Łapiński, Andrzej and Świetlik, Roman and Torunova, Svetlana A. and Zhilyaeva, Elena I. and Lyubovskaya, Rimma N. and Dressel, Martin}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2b2c89a27f784281857232be4d192cdd1/ulrikeoffenbeck}, booktitle = {The Journal of Chemical Physics}, comment = {doi: 10.1063/1.4997198}, doi = {10.1063/1.4997198}, interhash = {f8b324c56e9efae945418d9fd6d43abf}, intrahash = {b2c89a27f784281857232be4d192cdd1}, issn = {00219606}, journal = {The Journal of Chemical Physics}, keywords = {transition β″-(BEDT-TTF)2Hg(SCN)2Cl}, month = aug, number = 6, pages = 064503, publisher = {American Institute of Physics}, timestamp = {2018-03-08T14:13:33.000+0100}, title = {The metal-insulator transition in the organic conductor β″-(BEDT-TTF)2Hg(SCN)2Cl}, url = {https://doi.org/10.1063/1.4997198}, volume = 147, year = 2017 }