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Publications (28)

cond-mat.supr-con2026

Uniaxial stress enhanced anisotropic magnetoresistance and superconductivity in the kagome superconductor LaRu $_{3}$ Si $_{2}$

P. KrÃ¡l, V. Sazgari, Yongheng Ge +10

Elucidating the role of the kagome electronic structure in determining the various quantum ground states is of fundamental importance. In this work, we employ in-plane uniaxial str…

cond-mat.str-el2016

Magnetic ordering in the ultra-pure site-diluted spin chain materials SrCu $_{1 - x}$ Ni $_{x}$ O $_{2}$

G. Simutis, M. Thede, R. Saint-Martin +8

Muon spin rotation technique is used to study magnetic ordering in ultra-pure samples of SrCu $_{1 - x}$ Ni $_{x}$ O $_{2}$ , an archetypical $S = 1/2$ antiferromagnetic Heisenberg chain system…

cond-mat.supr-con2026

Unified pressure and field response across distinct charge-order regimes in Ti-doped CsV $_{3}$ Sb $_{5}$

P. KrÃ l, S. S. Islam, Andrea N. Capa Salinas +10

Understanding the phase diagram of kagome superconductors from a microscopic perspective is crucial for clarifying the interplay between charge order and superconductivity. Ti-dope…

cond-mat.str-el2018

Breakdown of magnetic order in the pressurized Kitaev iridate $I^^{2}$ -Li $_{2}$ IrO $_{3}$

M. Majumder, R. S. Manna, G. Simutis +14

Temperature-pressure phase diagram of the Kitaev hyperhoneycomb iridate $I^^{2}$ -Li $_{2}$ IrO $_{3}$ is explored using magnetization, thermal expansion, magnetostriction, and muon spin rotat…

cond-mat.str-el2021

Magnetic correlations in the semimetallic hyper-kagome iridate Na3Ir3O8

G. Simutis, T. Takayama, Q. BarthÃ©lemy +3

We present a microscopic study of a doped quantum spin liquid candidate, the hyperkagome Na $_{3}$ Ir $_{3}$ O $_{8}$ compound by using $^{23}$ Na NMR. We determine the intrinsic behavior of t…

cond-mat.supr-con2019

Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe $_{1 - x}$ S $_{x}$

S. Holenstein, J. Stahl, Z. Shermadini +10

We report muon spin rotation ( $I^¼$ SR) and magnetization measurements under pressure on Fe $_{1 + I^´}$ Se $_{1 - x}$ S $_{x}$ with x $\approx 0.11$ .Above $p \approx 0.6$ G…

cond-mat.str-el2018

Chemical- and hydrostatic-pressure effects on the Kitaev honeycomb material Na $_{2}$ IrO $_{3}$

G. Simutis, N. Barbero, K. Rolfs +10

The low-temperature magnetic properties of \tcr{polycrystalline} Na $_{2}$ IrO $_{3}$ , a candidate material for the realization of a quantum spin-liquid state, were investigated by means…

cond-mat.supr-con2018

Gradual Enhancement of Stripe-Type Antiferromagnetism in Spin Ladder Material BaFe $_{2}$ S $_{3}$ Under Pressure

Liangliang Zheng, Benjamin A. Frandsen, Changwei Wu +9

We report pressure-dependent neutron diffraction and muon spin relaxation/rotation measurements combined with first-principles calculations to investigate the structural, magnetic,…

cond-mat.str-el2013

Spin pseudogap in Ni-doped SrCuO2

G. Simutis, S. Gvasaliya, M. Mansson +11

The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni-impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Î~ 8 meV, abse…

cond-mat.str-el2016

Raman study of spin excitations in the tunable quantum spin ladder Cu(Qnx)(Cl $_{1 - x}$ Br $_{x}$ ) $_{2}$

G. Simutis, S. Gvasaliya, F. Xiao +2

Raman spectroscopy is used to study magnetic excitations in the quasi one dimensional $S = 1/2$ quantum spin systems Cu(Qnx)(Cl $_{1 - x}$ Br $_{x}$ ) $_{2}$ . The low energy spectrum is found t…

cond-mat.supr-con2026

The stripe state at 1/8 Ba doping hosts optimal superconductivity in La-214 cuprates under low in-plane stress

V. Sazgari, S. S. Islam, M. Lamotte +20

The cuprate system La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$ (LBCO) exhibits a pronounced sensitivity to in-plane uniaxial stress, particularly near the 1/8 doping anomaly, where stripe order st…

cond-mat.str-el2025

Fluctuating magnetism in Zn-doped averievite with well-separated kagome layers

G. Simutis, L. SuÃ¡rez-GarcÃa, H. Zeroual +15

Kagome lattice decorated with S=1/2 spins is one of the most discussed ways to realize a quantum spin liquid. However, all previous material realizations of this model have suffere…

cond-mat.str-el2023

Quantum disordered ground state in the spin-orbit coupled Jeff = 1/2 distorted honeycomb magnet BiYbGeO5

S. Mohanty, S. S. Islam, N. Winterhalter-Stocker +9

We delineate quantum magnetism in the strongly spin-orbit coupled, distorted honeycomb-lattice antiferromagnet BiYbGeO $_{5}$ . Our magnetization and heat capacity measurements revea…

cond-mat.str-el2025

Magnetic and phononic dynamics in the two-ladder quantum magnet (C5H9NH3)2CuBr4

J. Philippe, F. Elson, T. Arh +20

In quantum magnetic materials it is common to observe both static and dynamic lattice effects on the magnetic excitation spectrum. Less common is to find that the magnetic correlat…

cond-mat.str-el2017

Spin pseudogap in the $S = \frac{1}{2}$ chain material Sr $_{2}$ CuO $_{3}$ with impurities

G. Simutis, S. Gvasaliya, N. S. Beesetty +14

The low energy magnetic excitation spectrum of the Heisenberg antiferromagnetic $S = 1/2$ chain system Sr $_{2}$ CuO $_{3}$ with Ni- and Ca-impurities is studied by neutron spectroscopy.…

cond-mat.supr-con2025

Contrasting $c$ -axis and in-plane uniaxial stress effects on superconductivity and stripe order in La $_{1.885}$ Ba $_{0.115}$ CuO $_{4}$

S. S. Islam, V. Sazgari, J. N. Graham +16

The cuprate superconductor La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$ (LBCO) near $x = 0.125$ is a striking example of intertwined electronic orders, where 3D superconductivity is anomalously suppresse…

cond-mat.mtrl-sci2019

Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet

Z. Guguchia, J. Verezhak, D. Gawryluk +19

Magnetic topological phases of quantum matter are an emerging frontier in physics and material science. Along these lines, several kagome magnets have appeared as the most promisin…

cond-mat.mtrl-sci2017

A low-background piston-cylinder type hybrid high pressure cell for muon-spin rotation/relaxation experiments

Z. Shermadini, R. Khasanov, M. Elender +4

A low background double-wall piston-cylinder-type pressure cell is developed at the Paul Scherrer Institute. The cell is made from BERLYCO-25 (beryllium copper) and MP35N nonmagnet…

cond-mat.supr-con2023

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Z. Guguchia, D. Das, G. Simutis +23

The ability to efficiently control charge and spin in the cuprate high-temperature superconductors is crucial for fundamental research and underpins technological development. Here…

cond-mat.mtrl-sci2021

Universal fluctuating regime in triangular chromate antiferromagnets

K. Somesh, Y. Furukawa, G. Simutis +7

We report x-ray diffraction, magnetic susceptibility, heat capacity, $^{1}$ H nuclear magnetic resonance (NMR), and muon spin relaxation ( $I^¼$ SR) measurements, as well as density-fu…

cond-mat.supr-con2019

Muon spin rotation measurements on RbEuFe $_{4}$ As $_{4}$ under pressure

S. Holenstein, B. Fischer, Y. Liu +13

We report muon spin rotation and magnetization measurements on the magnetic superconductor RbEuFe $_{4}$ As $_{4}$ under hydrostatic pressures up to 3.8 GPa. At ambient pressure, RbEu…

cond-mat.str-el2024

Engineering Phase Competition Between Stripe Order and Superconductivity in La $_{1.88}$ Sr $_{0.12}$ CuO $_{4}$

J. KÃ¼spert, I. BiaÅo, R. Frison +18

Unconventional superconductivity often couples to other electronic orders in a cooperative or competing fashion. Identifying external stimuli that tune between these two limits is…

physics.ins-det2022

In-situ uniaxial pressure cell for X-ray and neutron scattering experiments

G. Simutis, A. Bollhalder, M. Zolliker +18

We present an in-situ uniaxial pressure device optimized for small angle X-ray and neutron scattering experiments at low-temperatures and high magnetic fields. A stepper motor gene…

cond-mat.str-el2024

Excitation Spectrum and Spin Hamiltonian of the Frustrated Quantum Ising Magnet Pr $_{3}$ BWO $_{9}$

J. Nagl, D. FlaviÃ¡n, S. Hayashida +16

We present a thorough experimental investigation on single crystals of the rare-earth based frustrated quantum antiferromagnet Pr $_{3}$ BWO $_{9}$ , a purported spin-liquid candidate on t…

cond-mat.str-el2022

Absence of magnetic order and emergence of unconventional fluctuations in $J_{eff} = 1/2$ triangular lattice antiferromagnet YbBO $_{3}$

K. Somesh, S. S. Islam, S. Mohanty +6

We present the ground state properties of a new quantum antiferromagnet YbBO $_{3}$ in which the isotropic Yb $^{3 +}$ triangular layers are separated by a non-magnetic layer of partial…

cond-mat.str-el2022

Single domain stripe order in a high-temperature superconductor

G. Simutis, J. KÃ¼spert, Q. Wang +15

The coupling of spin, charge and lattice degrees of freedom results in the emergence of novel states of matter across many classes of strongly correlated electron materials. A mode…

cond-mat.supr-con2025

Competing Quantum Orders in 6R-TaS $_{2}$ : Unconventional Superconductivity, Charge Order, and an Anomalous Hall Effect phase

V. Sazgari, J. N. Graham, S. S. Islam +13

The transition metal dichalcogenide 6R-TaS $_{2}$ offers a natural platform for studying the interplay among charge density wave (CDW) order, superconductivity, and transport anomal…

cond-mat.str-el2024

(C $_{5}$ H $_{9}$ NH $_{3}$ ) $_{2}$ CuBr $_{4}$ : a metal-organic two-ladder quantum magnet

J. Philippe, F. Elson, M. P. N. Casati +19

Low-dimensional quantum magnets are a versatile materials platform for studying the emergent many-body physics and collective excitations that can arise even in systems with only s…

Publications (28)

Uniaxial stress enhanced anisotropic magnetoresistance and superconductivity in the kagome superconductor LaRu3​Si2​

Magnetic ordering in the ultra-pure site-diluted spin chain materials SrCu1−x​Nix​O2​

Unified pressure and field response across distinct charge-order regimes in Ti-doped CsV3​Sb5​

Breakdown of magnetic order in the pressurized Kitaev iridate I^2-Li2​IrO3​

Magnetic correlations in the semimetallic hyper-kagome iridate Na3Ir3O8

Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe1-x​Sx​

Chemical- and hydrostatic-pressure effects on the Kitaev honeycomb material Na2​IrO3​

Gradual Enhancement of Stripe-Type Antiferromagnetism in Spin Ladder Material BaFe2​S3​ Under Pressure

Spin pseudogap in Ni-doped SrCuO2

Raman study of spin excitations in the tunable quantum spin ladder Cu(Qnx)(Cl1−x​Brx​)2​

The stripe state at 1/8 Ba doping hosts optimal superconductivity in La-214 cuprates under low in-plane stress

Fluctuating magnetism in Zn-doped averievite with well-separated kagome layers

Quantum disordered ground state in the spin-orbit coupled Jeff = 1/2 distorted honeycomb magnet BiYbGeO5

Magnetic and phononic dynamics in the two-ladder quantum magnet (C5H9NH3)2CuBr4

Spin pseudogap in the S=21​ chain material Sr2​CuO3​ with impurities

Contrasting c-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La1.885​Ba0.115​CuO4​

Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet

A low-background piston-cylinder type hybrid high pressure cell for muon-spin rotation/relaxation experiments

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Universal fluctuating regime in triangular chromate antiferromagnets

Muon spin rotation measurements on RbEuFe4​As4​ under pressure

Engineering Phase Competition Between Stripe Order and Superconductivity in La1.88​Sr0.12​CuO4​

In-situ uniaxial pressure cell for X-ray and neutron scattering experiments

Excitation Spectrum and Spin Hamiltonian of the Frustrated Quantum Ising Magnet Pr3​BWO9​

Absence of magnetic order and emergence of unconventional fluctuations in Jeff​=1/2 triangular lattice antiferromagnet YbBO3​

Single domain stripe order in a high-temperature superconductor

Competing Quantum Orders in 6R-TaS2​: Unconventional Superconductivity, Charge Order, and an Anomalous Hall Effect phase

(C5​H9​NH3​)2​CuBr4​: a metal-organic two-ladder quantum magnet

Uniaxial stress enhanced anisotropic magnetoresistance and superconductivity in the kagome superconductor LaRu $_{3}$ Si $_{2}$

Magnetic ordering in the ultra-pure site-diluted spin chain materials SrCu $_{1 - x}$ Ni $_{x}$ O $_{2}$

Unified pressure and field response across distinct charge-order regimes in Ti-doped CsV $_{3}$ Sb $_{5}$

Breakdown of magnetic order in the pressurized Kitaev iridate $I^^{2}$ -Li $_{2}$ IrO $_{3}$

Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe $_{1 - x}$ S $_{x}$

Chemical- and hydrostatic-pressure effects on the Kitaev honeycomb material Na $_{2}$ IrO $_{3}$

Gradual Enhancement of Stripe-Type Antiferromagnetism in Spin Ladder Material BaFe $_{2}$ S $_{3}$ Under Pressure

Raman study of spin excitations in the tunable quantum spin ladder Cu(Qnx)(Cl $_{1 - x}$ Br $_{x}$ ) $_{2}$

Spin pseudogap in the $S = \frac{1}{2}$ chain material Sr $_{2}$ CuO $_{3}$ with impurities

Contrasting $c$ -axis and in-plane uniaxial stress effects on superconductivity and stripe order in La $_{1.885}$ Ba $_{0.115}$ CuO $_{4}$

Muon spin rotation measurements on RbEuFe $_{4}$ As $_{4}$ under pressure

Engineering Phase Competition Between Stripe Order and Superconductivity in La $_{1.88}$ Sr $_{0.12}$ CuO $_{4}$

Excitation Spectrum and Spin Hamiltonian of the Frustrated Quantum Ising Magnet Pr $_{3}$ BWO $_{9}$

Absence of magnetic order and emergence of unconventional fluctuations in $J_{eff} = 1/2$ triangular lattice antiferromagnet YbBO $_{3}$

Competing Quantum Orders in 6R-TaS $_{2}$ : Unconventional Superconductivity, Charge Order, and an Anomalous Hall Effect phase

(C $_{5}$ H $_{9}$ NH $_{3}$ ) $_{2}$ CuBr $_{4}$ : a metal-organic two-ladder quantum magnet