115 citations · 321 across the 19 of their papers we have counts for
19 papers
Vibrational Origin of the Barocaloric Effect in the Spin-Crossover Complex Fe(pap-5NO2)2: A Combined DFT and Mean-Field Study
Alan de Souza, Antonio M. dos Santos, Yongqiang Cheng +2
Despite the barocaloric performance recently reported for the spin-crossover complex Fe(pap-5NO2)2, the microscopic origin of its pressure-induced entropy change remains poorly und…
Helical Spin Dynamics in Commensurate Magnets: a Study on Brochantite, CuSO(OH)
S. E. Nikitin, Tao Xie, A. Gazizulina +8
We report the direct observation of a commensurate-ordered antiferromagnetic (AFM) state but incommensurate helical spin dynamics in the natural mineral brochantite CuSO(OH…
Cobalt-Based Pyroxenes: A New Playground for Kitaev Physics and Ising Model Realization
Pavel A. Maksimov, Alexey V. Ushakov, Andey F. Gubkin +8
Recent advances in the study of cobaltites have unveiled their potential as a promising platform for realizing Kitaev physics in honeycomb systems and the Ising model in weakly cou…
Incommensurate Spiral Spin Order in CaMnBi observed via High Pressure Neutron Diffraction
Madalynn Marshall, Haozhe Wang, Antonio M. dos Santos +2
High pressure neutron diffraction is employed to investigate the magnetic behavior of CaMnBi in extreme conditions. In contrast to antiferromagnetic ordering on Mn atoms re…
Origin of spin-driven ferroelectricity and effect of external pressure on the complex magnetism of 6H-perovskite Ba3HoRu2O9
E. Kushwaha, G. Roy, M. Kumar +7
The compound Ba3HoRu2O9 magnetically orders at 50 K (TN1) followed by another complex magnetic ordering at 10.2 K (TN2). The 2nd magnetic phase transition was characterized by the…
Spin crossover transition driven by pressure: Barocaloric applications
Mario Reis, Yongqiang Cheng, Antonio M. dos Santos
This article describes a mean-field theoretical model for Spin-Crossover (SCO) materials and explores its implications. It is based on a simple Hamiltonian that yields the high spi…
Pressure-induced insulator-metal transition in two-dimensional Mott insulator NiPS3
Takahiro Matsuoka, Amanda Haglund, Rui Xue +4
The pressure-induced insulator to metal transition (IMT) of layered magnetic nickel phosphorous tri-sulfide NiPS3 was studied in-situ under quasi-uniaxial conditions by means of el…
Decoupling lattice and magnetic instabilities in frustrated CuMnO
Keith V. Lawler, Dean Smith, Shaun R. Evans +8
The MnO delafossites (=Na, Cu), are model frustrated antiferromagnets, with triangular layers of Mn~spins. At low temperatures (=65 K), a $C2/m \rightarro…
Pressure induced topological quantum phase transition in Weyl semimetal T_d-MoTe_2
Z. Guguchia, A. M. dos Santos, F. O. von Rohr +11
We report the pressure (p_max = 1.5 GPa) evolution of the crystal structure of the Weyl semimetal T_d-MoTe_2 by means of neutron diffraction experiments. We find that the fundament…
Stronger quantum fluctuation with larger spins: Emergent magnetism in the pressurized high-temperature superconductor FeSe
Yuting Tan, Tianyu Zhang, Tao Zou +6
A counter-intuitive enhancement of quantum fluctuation with larger spins, together with a few novel physical phenomena, is discovered in studying the recently observed emergent mag…
Pressure tuning of structure, superconductivity and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1)
Z. Guguchia, T. Adachi, Z. Shermadini +15
High-pressure neutron powder diffraction, muon-spin rotation and magnetization studies of the structural, magnetic and the superconducting properties of the Ce-underdoped supercond…
Pressure-induced collapsed-tetragonal phase in SrCo2As2
W. T. Jayasekara, U. S. Kaluarachchi, B. G. Ueland +16
We present high-energy x-ray diffraction data under applied pressures up to p = 29 GPa, neutron diffraction measurements up to p = 1.1 GPa, and electrical resistance measurements u…
Pressure-Induced Structural Phase Transition in CeNi: X-ray and Neutron Scattering Studies and First-Principles Calculations
A. Mirmelstein, A. Podlesnyak, Antnio M. dos Santos +7
The pressure-induced structural phase transition in the intermediate-valence compound CeNi has been investigated by X-ray and neutron powder diffraction techniques. For the first t…
High-pressure single-crystal neutron scattering study of magnetic and Fe vacancy orders in (Tl,Rb)2Fe4Se5 superconductor
Feng Ye, Wei Bao, Songxue Chi +7
The magnetic and iron vacancy orders in superconducting (Tl,Rb)2Fe4Se5 single-crystals are investigated by using a high-pressure neutron diffraction technique. Similar to the tempe…
Pressure induced renormalization of energy scales in the unconventional superconductor FeTe0.6Se0.4
Karol Marty, Andrew D. Christianson, Antonio M. dos Santos +8
We have carried out a pressure study of the unconventional superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering, resistivity and magnetic susceptibility measurements. We…
Temperature and Pressure Dependence of the Fe-specific Phonon Density of States in Ba(Fe(1-x)Co(x))2As2
O. Delaire, M. S. Lucas, A. M. dos Santos +15
The {57}Fe-specific phonon density of states of Ba(Fe(1-x)Co(x))2As2 single crystals (x=0.0, 0.08) was measured at cryogenic temperatures and at high pressures with nuclear-resonan…
Entanglement temperature in molecular magnets composed of S-spin dimers
D. O. Soares-Pinto, A. M. Souza, R. S. Sarthour +5
In the present work, we investigate the quantum thermal entanglement in molecular magnets composed of dimers of spin , using an Entanglement Witness built from measurements of m…
Entanglement and Bell's inequality violation above room temperature in metal carboxylates
A. M. Souza, D. O. Soares-Pinto, R. S. Sarthour +4
In the present work we show that a special family of materials, the metal carboxylates, may have entangled states up to very high temperatures. From magnetic susceptibility measure…
Charge Ordering and Phase Competition in the Layered Perovskite Lasr2mn2o7
D. N Argyriou, H. N. Bordallo1, B. J. Campbell +6
Charge-lattice fluctuations are observed in the layered perovskite manganite LaSr2Mn2O7 by Raman spectroscopy as high as 340 K and with decreasing temperature they become static an…