376 citations · 1.2k across the 46 of their papers we have counts for
38 papers · 1 filter
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…
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…
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…
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…
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…
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…
Tuning the Fermi Liquid Crossover in SrRuO with Uniaxial Stress
Aaron Chronister, Manuel Zingl, Andrej Pustogow +10
We perform nuclear magnetic resonance (NMR) measurements of the oxygen-17 Knight shifts for SrRuO, while subjected to uniaxial stress applied along [100] direction. The res…
Rise and Fall of Landau's Quasiparticles While Approaching the Mott Transition
Andrej Pustogow, Yohei Saito, Anja Löhle +5
Landau suggested that the low-temperature properties of metals can be understood in terms of long-lived quasiparticles with all complex interactions included in Fermi-liquid parame…
Gapped magnetic ground state in quantum-spin-liquid candidate -(BEDT-TTF)-Cu(CN)
Björn Miksch, Andrej Pustogow, Mojtaba Javaheri Rahim +6
Geometrical frustration, quantum entanglement and disorder may prevent long-range order of localized spins with strong exchange interactions, resulting in a novel state of matter.…
Lattice dynamics in the spin-1/2 frustrated kagome compound herbertsmithite
Ying Li, A. Pustogow, M. Bories +4
We investigate the lattice dynamics in the spin-1/2 frustrated kagome compound herbertsmithite ZnCu(OH)Cl by a combination of infrared spectroscopy measurements and ab…
Bandwidth-tuning from insulating Mott quantum spin liquid to Fermi liquid via chemical substitution in -[(BEDT-TTF)(BEDT-STF)]Cu(CN)
Y. Saito, R. Rösslhuber, A. Löhle +5
The electronic properties of molecular conductors can be readily varied via physical or chemical pressure as it increases the bandwidth W; this enables crossing the Mott insulator-…
Impurity Moments Conceal Low-Energy Relaxation of Quantum Spin Liquids
A. Pustogow, T. Le, H. -H. Wang +5
We scrutinize the magnetic properties of -(BEDT-TTF)Hg(SCN)Cl through its first-order metal-insulator transition at K by means of H nuclear magnetic…
Phase coexistence at the first-order Mott-transition revealed by pressure-dependent dielectric spectroscopy of -(BEDT-TTF)Cu(CN)
R. Rösslhuber, A. Pustogow, E. Uykur +7
The dimer Mott insulator -(BEDT-TTF)Cu(CN) can be tuned into a metallic and superconducting state upon applying pressure of 1.5 kbar and more. We have performed diel…
Low-Temperature Dielectric Anomalies at the Mott Insulator-Metal Transition
A. Pustogow, R. Rösslhuber, Y. Tan +10
The correlation-driven Mott transition is commonly characterized by a drop in resistivity across the insulator-metal phase boundary; yet, the complex permittivity provides a deeper…