Universidade Estadual de Campinas (UNICAMP)

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19922026

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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197 papers · 1 filter

cond-mat.str-el2026

Edge States Effects in Quantum Work Statistics

Moallison F. Cavalcante

Motivated by the objective of quantifying the energetic cost of accessing boundary phases through local control, we investigate here a simple, analytically tractable quantum impuri…

cond-mat.str-el2025

Evidence for a field-induced Lifshitz transition in the Weyl semimetal CeAlSi

M. M. Piva, T. Helm, J. C. Souza +4

The Weyl semimetal CeAlSi crystallises in the noncentrosymmetric tetragonal space group $I 4_{1} m d$ and exhibits ferromagnetic order below 8 K, thereby breaking both spatial inversion…

cond-mat.str-el2025

Asymptotically exact solution of the non-Hermitian disordered interacting Hatano-Nelson chain

Valéria M. Mattiello, Victor L. Quito, Eduardo Miranda

We present an asymptotically exact solution of a paradigmatic non-Hermitian model: the disordered interacting fermionic Hatano-Nelson model, or equivalently, the non-Hermitian spin…

cond-mat.str-el2025★ 4 cited

The spin-orbital Kitaev model: from kagome spin ice to classical fractons

Weslei B. Fontana, Fabrizio G. Oliviero, Rodrigo G. Pereira +1

We study an exactly solvable spin-orbital model that can be regarded as a classical analogue of the celebrated Kitaev honeycomb model and describes interactions between Rydberg ato…

cond-mat.str-el2025★ 4 cited

Emergence of $X$ states in a quantum impurity model

Moallison F. Cavalcante, Marcus V. S. Bonança, Eduardo Miranda +1

In the present work, we demonstrate the emergence of $X$ states in the long-time response of a locally perturbed many-body quantum impurity model. The emergence of the double-qubit…

cond-mat.str-el2024

Magnetic structure and component-separated transitions of HoNiSi $_{3}$

R. Tartaglia, F. R. Arantes, C. W. Galdino +7

HoNiSi $_{3}$ is an intermetallic compound characterized by two successive antiferromagnetic transitions at $T_{N 1} = 6.3$ K and $T_{N 2} = 10.4$ K. Here, its zero-field microscopic…

cond-mat.str-el2024★ 3 cited

Nano-welding of quantum spin- $1/2$ chains at minimal dissipation

Moallison F. Cavalcante, Marcus V. S. Bonança, Eduardo Miranda +1

We consider the optimal control of switching on a coupling term between two quantum many-body systems. Specifically, we (i) quantify the energetic cost of establishing a weak junct…

cond-mat.str-el2024★ 3 cited

Spin-state ordering and intermediate states in the mixed-valence cobalt oxyborate Co $_{3}$ O $_{2}$ BO $_{3}$ with spin crossover

E. Granado, C. W. Galdino, B. D. Moreno +2

Spin-state ordering - a periodic pattern of ions with different spin-state configurations along a crystal lattice - is a rare phenomenon, and its possible interrelation with other…

cond-mat.str-el2024★ 2 cited

Multi-Dirac and Weyl physics in heavy-fermion systems

Joelson F. Silva, E. Miranda

We have studied multi-Dirac/Weyl systems with arbitrary topological charge n in the presence of a lattice of local magnetic moments. To do so, we propose a multi-Dirac/Weyl Kondo l…

cond-mat.str-el2023★ 2 cited

Hole doping and electronic correlations in Cr-substituted BaFe $_{2}$ As $_{2}$

Marli R. Cantarino, K. R. Pakuszewski, Björn Salzmann +7

Superconductivity (SC) is absent in Cr-substituted BaFe $_{2}$ As $_{2}$ (CrBFA), a well-established but poorly understood topic. Additionally, the suppression of the spin density wav…

cond-mat.str-el2023★ 5 cited

Thermal Hall conductivity of a valence bond solid phase in the square lattice $J_{1}$ - $J_{2}$ antiferromagnet Heisenberg model with a Dzyaloshinskii-Moriya interaction

Lucas S. Buzo, R. L. Doretto

We calculate the thermal Hall conductivity $κ_{x y}$ for the columnar valence-bond solid phase of a two-dimensional frustrated antiferromagnet. In particular, we consider the square…

cond-mat.str-el2023★ 22 cited

Topological Hall effect in CeAlGe

M. M. Piva, J. C. Souza, G. A. Lombardi +4

The Weyl semimetal CeAlGe is a promising material to study nontrivial topologies in real and momentum space due to the presence of a topological magnetic phase. Our results at ambi…

cond-mat.str-el2023★ 33 cited

Topological features in the ferromagnetic Weyl semimetal CeAlSi: Role of domain walls

M. M. Piva, J. C. Souza, V. Brousseau-Couture +8

In the ferromagnetic (FM) Weyl semimetal CeAlSi both space-inversion and time-reversal symmetries are broken. Our quantum oscillation (QO) data indicate that the FM ordering modifi…

cond-mat.str-el2022★ 76 cited

Spin-phonon coupling driven Charge density wave in a Kagome Magnet

H. Miao, T. T. Zhang, H. X. Li +14

The intertwining between spin, charge, and lattice degrees of freedom can give rise to unusual macroscopic quantum states, including high-temperature superconductivity and quantum…

cond-mat.str-el2022★ 1 cited

Effects of external pressure on the narrow gap semiconductor Ce $_{3}$ Cd $_{2}$ As $_{6}$

M. M. Piva, L. Xiang, J. D. Thompson +4

Here we report the magnetic and electronic properties of recently discovered Ce $_{3}$ Cd $_{2}$ As $_{6}$ . At ambient pressure, Ce $_{3}$ Cd $_{2}$ As $_{6}$ presents a semiconducting behav…

cond-mat.str-el2022★ 3 cited

Flat-band ferromagnetism in a correlated topological insulator on a honeycomb lattice

Leonardo S. G. Leite, R. L. Doretto

We study the flat-band ferromagnetic phase of a spinfull and time-reversal symmetric Haldane-Hubbard model on a honeycomb lattice within a bosonization formalism for flat-band Z$_2…

cond-mat.str-el2022★ 2 cited

Enhanced magnetism and suppressed magnetoelastic coupling induced by electron doping in Ca $_{1 - x}$ Y $_{x}$ MnReO $_{6}$

A. S. Cavichini, M. T. Orlando, M. C. A. Fantini +5

The Ca $_{2}$ MnReO $_{6}$ double perovskite is a spin-orbit-assisted Mott insulator with exotic magnetic properties, including a largely non-collinear Mn $^{2 +}$ spin arrangement and near…

cond-mat.str-el2022★ 4 cited

Slow crystalline electric field fluctuations in the Kondo lattice SmB $_{6}$

M. Carlone, J. C. Souza, J. Sichelschmidt +7

This work reports on the temperature dependence of the electron spin resonance (ESR) of Gd $^{3 +}$ -doped SmB $_{6}$ single crystals at X- and Q-band microwave frequencies in differen…

cond-mat.str-el2022★ 10 cited

Orbital localization and the role of the Fe and As $4 p$ orbitals in BaFe $_{2}$ As $_{2}$ probed by XANES

A. G. de Figueiredo, M. R. Cantarino, W. R. da Silva Neto +9

The polarization dependence of the near edge x-ray absorption spectroscopy (XANES) is an element specific probe to the real-space distribution of the density of unoccupied states i…

cond-mat.str-el2022★ 17 cited

Microscopic probe of magnetic polarons in antiferromagnetic Eu $_{5}$ In $_{2}$ Sb $_{6}$

J. C. Souza, S. M. Thomas, E. D. Bauer +4

Colossal magnetoresistance (CMR) emerges from intertwined spin and charge degrees of freedom in the form of ferromagnetic clusters also known as trapped magnetic polarons. As a res…

cond-mat.str-el2021★ 1 cited

Mott domain walls: a (strongly) non-Fermi liquid state of matter

Tsung-Han Lee, J. Vučičević, D. Tanasković +2

Most Mott systems display a low-temperature phase coexistence region around the metal-insulator transition. The domain walls separating the respective phases have very recently bee…

cond-mat.str-el2021★ 15 cited

Anisotropic nematic fluctuations above the ferroquadrupolar transition in TmVO $_{4}$

Z. Wang, I. Vinograd, Z. Mei +5

TmVO $_{4}$ exhibits ferroquadrupolar order below 2.15 K with a well-isolated non-Kramers ground state doublet, and is a model system to understand Ising nematic order. We present $^{…

cond-mat.str-el2021★ 12 cited

Structural and spectroscopic investigation of the charge-ordered, short-range ordered, and disordered phases of the Co $_{3}$ O $_{2}$ BO $_{3}$ ludwigite

C. W. Galdino, D. C. Freitas, C. P. C. Medrano +13

In this work, we investigate the representative case of the homometallic Co ludwigite Co $_{2}^{2 +}$ Co $^{3 +}$ O $_{2}$ BO $_{3}$ ( $P bam$ space group) with four distinct Co crystallographic si…

cond-mat.str-el2021★ 6 cited

The case of SU $(3)$ criticality in spin-2 chains

Chengshu Li, Victor Luiz Quito, Eduardo Miranda +3

It was proposed in [(https://doi.org/10.1103/PhysRevLett.114.145301){Chen et al., Phys. Rev. Lett. $114$ , 145301 (2015)}] that spin-2 chains display an extended critical p…

Edge States Effects in Quantum Work Statistics

Evidence for a field-induced Lifshitz transition in the Weyl semimetal CeAlSi

Asymptotically exact solution of the non-Hermitian disordered interacting Hatano-Nelson chain

The spin-orbital Kitaev model: from kagome spin ice to classical fractons

Emergence of X states in a quantum impurity model

Magnetic structure and component-separated transitions of HoNiSi3​

Nano-welding of quantum spin-1/2 chains at minimal dissipation

Spin-state ordering and intermediate states in the mixed-valence cobalt oxyborate Co3​O2​BO3​ with spin crossover

Multi-Dirac and Weyl physics in heavy-fermion systems

Hole doping and electronic correlations in Cr-substituted BaFe2​As2​

Thermal Hall conductivity of a valence bond solid phase in the square lattice J1​-J2​ antiferromagnet Heisenberg model with a Dzyaloshinskii-Moriya interaction