376 citations · 1.2k across the 46 of their papers we have counts for
48 papers
Breaking the Wiedemann-Franz limit in thermoelectrics via separated flat bands
Illia Serhiienko, Fabian Garmroudi, Stefan Enzner +3
Controlling the charge and spin degrees of freedom of electrons in solids has been at the heart of condensed-matter science for centuries. One hallmark of metallic conduction is th…
Antiferromagnetic order and magnetic polarons in lightly doped LiCoO (x 0.9)
Sudip Pal, Pampa Sadhukhan, Waqar Suleman +2
We investigate the magnetic properties of LiCoO (x0.9) using bulk magnetization, specific heat, nuclear magnetic resonance (NMR) and electron paramagnetic resonance (…
Mott Intermittency at the Metal-Insulator Boundary
Yuxin Wang, Vladimir Dobrosavljević, Jan Jaroszyński +5
The resistivity maximum at a temperature is a recurring feature of bandwidth-tuned Mott systems, yet its meaning remains controversial: is it a coherence-incoh…
Quasiparticle to local moment crossover in bad metals
A. Chen, F. B. Kugler, P. Doležal +4
Non-Fermi-liquid charge transport in the vicinity of electronic instabilities has been intensely studied for decades. Deviations from in bad and strange metal…
-type RuTiHfSi full-Heusler bulk thermoelectrics with
Fabian Garmroudi, Illia Serhiienko, Michael Parzer +4
Heusler compounds have emerged as important thermoelectric materials due to their combination of promising electronic transport properties, mechanical robustness and chemical stabi…
Universal relation between residual resistivity and A coefficient in correlated metals
Anna Yu. Efimova, Yohei Saito, Atsushi Kawamoto +3
The effects of strong electronic correlations and disorder are crucial for emergent phenomena such as unconventional superconductivity, metal-insulator transitions, and quantum cri…
Tracking flat bands via phonon-mediated interband scattering
Fabian Garmroudi, Jennifer Coulter, Xinlin Yan +7
Flat-band (FB) systems offer a fertile platform for realizing exotic correlated and topological phases, yet central challenges remain in tuning FBs towards the Fermi level $E_\text…
Failed superconductivity in a Mott spin liquid material
Yuxin Wang, Vladimir Dobrosavljević, Eun Sang Choi +5
A central challenge for understanding unconventional superconductivity in most strongly correlated electronic materials is their complicated band structure and presence of competin…
Emergence of a Fluctuating Ground State in Y-kapellasite under Pressure
Dipranjan Chatterjee, Petr Doležal, Federico Abbruciati +17
Y-kapellasite (YCu(OH)Cl), which hosts an original anisotropic kagome sublattice, is a promising candidate for studying elusive and complex correlated physics. I…
Energy filtering-induced ultrahigh thermoelectric power factors in NiGe
Fabian Garmroudi, Simone Di Cataldo, Michael Parzer +15
Traditional thermoelectric materials rely on low thermal conductivity to enhance their efficiency but suffer from inherently limited power factors. Novel pathways to optimize elect…
Thermoelectric transport in RuTiSi full-Heusler compounds
Fabian Garmroudi, Michael Parzer, Takao Mori +2
Heusler compounds with six valence electrons per atom have attracted interest as thermoelectric materials owing to their semimetallic and semiconducting properties. Here, we theore…
Mapping delocalization of impurity bands across archetypal Mott-Anderson transition
M. Parzer, F. Garmroudi, A. Riss +3
Tailoring charge transport in solids on demand is the overarching goal of condensed-matter research as it is crucial for electronic applications. Yet, often the proper tuning knob…
Lattice dynamics of the frustrated kagome compound Y-kapellasite
P. Doležal, T. Biesner, Y. Li +6
Studying the magnetic ground states of frustrated antiferromagnets provides unique insight into the stability of quantum spin liquids, even if the anticipated state is not realized…
Gapped magnetic ground state in the spin-liquid candidate -(BEDT-TTF)Ag(CN) suggested by magnetic spectroscopy
Sudip Pal, Björn Miksch, Hans-Albrecht Krug von Nidda +10
The nature of the magnetic ground state of highly frustrated systems remained puzzling to this day. Here, we have performed multifrequency electron spin resonance (ESR) measurement…
High thermoelectric power factor through topological flat bands
Fabian Garmroudi, Illia Serhiienko, Simone Di Cataldo +11
Thermoelectric (TE) materials are useful for applications such as waste heat harvesting or efficient and targeted cooling. While various strategies towards superior thermoelectrics…
SrCu(OH)Cl, an ideal isolated equilateral triangle spin = 1/2 model system
Sudip Pal, Petr Doležal, Scott A. Strøm +5
We have investigated the magnetic ground state properties of the quantum spin trimer compound strontium hydroxy copper chloride SrCu(OH)Cl using bulk magnetization, specific he…
High thermoelectric performance in metallic NiAu alloys
Fabian Garmroudi, Michael Parzer, Alexander Riss +5
Thermoelectric (TE) materials seamlessly convert thermal into electrical energy and vice versa, making them promising for applications such as power generation or cooling. Although…
Thermodynamic Properties of the Mott Insulator-Metal Transition in a Triangular Lattice System Without Magnetic Order
Emre Yesil, Shusaku Imajo, Satoshi Yamashita +5
The organic system, -[(BEDT-TTF)(BEDT-STF)]Cu(CN), showing the Mott transition between a nonmagnetic Mott insulating (NMI) state and a Fermi liquid (FL),…
From spin liquid to magnetic ordering in the anisotropic kagome Y-Kapellasite Y3Cu9(OH)19Cl8: a single crystal study
D. Chatterjee, P. Puphal, Q. Barthélemy +15
Y3Cu9(OH)19Cl8 realizes an original anisotropic kagome model hosting a rich magnetic phase diagram [M. Hering et al, npj Computational Materials 8, 1 (2022)]. We present an improve…
Upper Critical Field of SrRuO under In-Plane Uniaxial Pressure
Fabian Jerzembeck, Alexander Steppke, Andrej Pustogow +9
In-plane uniaxial pressure has been shown to strongly tune the superconducting state of Sr2RuO4 by approaching a Lifshitz transition and associated Van Hove singularity (VHS) in th…
Controlling frustrated magnetism on the kagome lattice by uniaxial-strain tuning
Jierong Wang, Y. -S. Su, M. Spitaler +4
It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy exci…
Chasing the spin gap through the phase diagram of a frustrated Mott insulator
A. Pustogow, Y. Kawasugi, H. Sakurakoji +1
The quest for entangled spin excitations has stimulated intense research on frustrated magnetic systems. For almost two decades, the triangular-lattice Mott insulator -(BEDT-TTF…
Multi-Center Magnon Excitations Open the Entire Brillouin Zone to Terahertz Magnetometry of Quantum Magnets
Tobias Biesner, Seulki Roh, Aleksandar Razpopov +14
Due to the small photon momentum, optical spectroscopy commonly probes magnetic excitations only at the center of the Brillouin zone; however, there are ways to override this restr…
Magnetic terahertz resonances above the Néel temperature in the frustrated kagome antiferromagnet averievite
Tobias Biesner, Seulki Roh, Andrej Pustogow +3
Time-domain magneto-THz spectroscopy is utilized to study the frustrated magnet averievite CuZnVO(CsCl). Pronounced THz resonances are observed in unsubstitu…