46 citations · 193 across the 9 of their papers we have counts for
9 papers
Tetramethylbenzidine-TetrafluoroTCNQ: A narrow-gap semiconducting salt with room temperature relaxor ferroelectric behavior
Stefano Canossa, Elena Ferrari, Pit Sippel +8
We present an extension and revision of the spectroscopic and structural data of the mixed stack charge transfer (CT) crystal 3,3,5,5-tetramethylbenzidine--tetraf…
Supercooled water confined in a metal-organic framework
Jonas K. H. Fischer, Pit Sippel, Dmytro Denysenko +3
Within the so-called "no-man's land" between about 150 and 235 K, crystallization of bulk water is inevitable. The glasslike freezing and a liquid-to-liquid transition of water, pr…
Intriguing relaxor ferroelectricity in a polar CT crystal at the neutral-ionic interface
J. K. H. Fischer, G. D'Avino, M. Masino +4
We investigated the mixed-stack charge-transfer crystal, N,N'-dimethylphenazine-TCNQ (MP-TCNQ), which is polar at room temperature and just at the neutral-to-ionic interface (i…
Glycerol confined in zeolitic imidazolate frameworks: The temperature-dependent cooperativity length scale of glassy freezing
M. Uhl, J. K. H. Fischer, P. Sippel +4
In the present work, we employ broadband dielectric spectroscopy to study the molecular dynamics of the prototypical glass former glycerol confined in two microporous zeolitic imid…
Relaxation dynamics in the one-dimensional organic charge-transfer salt δ-(EDT-TTF-CONMe)Br
J. K. H. Fischer, P. Lunkenheimer, C. Leva +6
A detailed investigation of the charge-ordered charge-transfer salt δ-(EDT-TTF-CONMe)Br by thermal-expansion measurements and dielectric spectroscopy reveals three dyna…
Evidence for electronically-driven ferroelectricity in the family of strongly correlated dimerized BEDT-TTF molecular conductors
Elena Gati, Jonas K. H. Fischer, Peter Lunkenheimer +10
By applying measurements of the dielectric constants and relative length changes to the dimerized molecular conductor -(BEDT-TTF)Hg(SCN)Cl, we provide evidence for order…
Effect of adding nanometre-sized heterogeneities on the structural dynamics and the excess wing of a molecular glass former
S. Gupta, J. K. H. Fischer, P. Lunkenheimer +4
We present the relaxation dynamics of glass-forming glycerol mixed with 1.1 nm sized polyhedral oligomeric silsesquioxane (POSS) molecules using dielectric spectroscopy (DS) and tw…
MFU-type metal-organic frameworks as host materials of confined supercooled liquids
J. K. H. Fischer, P. Sippel, D. Denysenko +3
In this work we examine the use of metal-organic framework (MOF) systems as host materials for the investigation of glassy dynamics in confined geometry. We investigate the confine…
Orbital-selective metal-insulator transition and gap formation above Tc in superconducting Rb1-xFe2-ySe2
Zhe Wang, M. Schmidt, J. Fischer +5
We report on a hierarchy of temperatures Tc < Tgap < Tmet in superconducting Rb1-xFe2-ySe2 observed by THz spectroscopy. Above Tmet = 90 K the material reveals semiconducting chara…