Article
Physics, Multidisciplinary
Edwin Herrera, Victor Barrena, Isabel Guillamon, Jose Augusto Galvis, William J. Herrera, Jose Castilla, Dai Aoki, Jacques Flouquet, Hermann Suderow
Summary: The researchers used scanning tunnelling microscopy to reveal a 1D charge density wave in URu2Si2, demonstrating a potential connection with the hidden order state and indicating that charge interactions are among the most relevant features competing with hidden order in URu2Si2.
COMMUNICATIONS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Emmanouil Frantzeskakis, Ji Dai, Cedric Bareille, Tobias C. Roedel, Monika Guettler, Sheng Ran, Noravee Kanchanavatee, Kevin Huang, Naveen Pouse, Christian T. Wolowiec, Emile D. L. Rienks, Pascal Lejay, Franck Fortuna, M. Brian Maple, Andres F. Santander-Syro
Summary: Spontaneous symmetry breaking leads to phase transitions characterized by an order parameter, with phase transitions involving unknown order parameters being rare but intriguing. The transition of the heavy fermion compound URu2Si2 into the hidden-order phase is still unsolved, with research showing the interaction between heavy fermions and conduction band states near the Fermi level playing a crucial role. Analysis using angle-resolved photoemission spectroscopy reveals that the nonrigid change in the electronic structure between the hidden-order and antiferromagnetic phases suggests a change in the interaction strength between states near the Fermi level is crucial for the phase transition.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Christian T. Wolowiec, Noravee Kanchanavatee, Kevin Huang, Sheng Ran, Alexander J. Breindel, Naveen Pouse, Kalyan Sasmal, Ryan E. Baumbach, Greta Chappell, Peter S. Riseborough, M. Brian Maple
Summary: Electrical resistivity measurements were performed on single crystals of URu2-xOsxSi(2) up to x = 0.28 under hydrostatic pressure up to 2 GPa, revealing that increasing Os concentration leads to lattice expansion, enhanced hidden-order (HO) phase, and a shift towards a large-moment antiferromagnetic (LMAFM) phase. Pressure, Fe substitution, and Os substitution are the only known perturbations that enhance the HO phase and induce the first-order transition to the LMAFM phase in URu2Si2.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Letter
Materials Science, Multidisciplinary
Xingyu Ji, Yun Zhang, Xiaoying Wang, Yi Liu
Summary: The study demonstrates power-law behavior in the electrical resistivity, magnetic susceptibility, and specific heat of high-quality URu2Si2 single crystals in the hidden-order region, consistent with the Griffiths model. The Griffiths phase is characterized by residual short-range correlations on the collapse of the long-range large-moment antiferromagnetic phase, with evidence of cluster-like spins.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Myounghoon Lee, Yu-Seong Seo, Seulki Roh, Seokbae Lee, Jihyun Kim, Junwon Kim, Tuson Park, Ji Hoon Shim, Jungseek Hwang
Summary: We investigated the electronic evolution of CeCoIn5 using infrared spectroscopy and compared it with LaCoIn5, which has no f electrons. The differences caused by the f electrons were observed to be more obvious in low-energy optical spectra at low temperatures. By introducing a complex optical resistivity, a magnetic optical resistivity was obtained from the difference in resistivity spectra of the two systems. The onset temperature of the Kondo effect in CeCoIn5 was found to be much higher than the known onset temperature of Kondo scattering, suggesting the presence of hybridization gaps.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Xingyu Wang, Dongliang Gong, Bo Liu, Xiaoyan Ma, Jinyu Zhao, Pengyu Wang, Yutao Sheng, Jing Guo, Liling Sun, Wen Zhang, Xinchun Lai, Shiyong Tan, Yi-feng Yang, Shiliang Li
Summary: The resistivity of URu2-xFexSi2 samples is influenced by uniaxial pressure, revealing qualitative differences between the hidden order and large-moment antiferromagnetic phases.
CHINESE PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Nikola Maksimovic, Daniel H. Eilbott, Tessa Cookmeyer, Fanghui Wan, Jan Rusz, Vikram Nagarajan, Shannon C. Haley, Eran Maniv, Amanda Gong, Stefano Faubel, Ian M. Hayes, Ali Bangura, John Singleton, Johanna C. Palmstrom, Laurel Winter, Ross McDonald, Sooyoung Jang, Ping Ai, Yi Lin, Samuel Ciocys, Jacob Gobbo, Yochai Werman, Peter M. Oppeneer, Ehud Altman, Alessandra Lanzara, James G. Analytis
Summary: This article discusses the existence of a quantum critical point in the unconventional superconductor CeCoIn5, characterized by the connection of Fermi surfaces and electron delocalization, without apparent broken symmetry. The article provides a model that interprets this transition as the fractionalization of spin and charge, effectively describing the anomalous transport behavior observed for the Hall effect.
Article
Physics, Multidisciplinary
V. R. Shaginyan, A. Z. Msezane, M. V. Zverev, Y. S. Leevik
Summary: The condensed-matter community is engaged in a heated debate over the nature of quantum critical points (QCP) governing the low-temperature properties of heavy fermion metals. Experimental observations, including smeared jump-like behavior in residual resistivity ρ0 and Hall resistivity RH, violation of time invariance symmetry T and charge invariance C, and violation of quasiparticle-hole symmetry, provide important clues on the origin of both the non-Fermi-liquid behavior and QCP. Based on significant experimental data for the first time, it is shown that these observations unambiguously point to the symmetry violation accompanying the QCP of CeCoIn5, and that QCP itself is represented by the topological fermion-condensation quantum phase transition (FCQPT) connecting two Fermi surfaces with different topological charges.
Article
Materials Science, Multidisciplinary
Wen Zhang, Wei Feng, Xuebing Luo, Shiyong Tan, Donghua Xie, Yi Liu, Yun Zhang, Qunqing Hao, Qiang Zhang, Xiegang Zhu, Qin Liu, Qiuyun Chen, Xinchun Lai
Summary: Despite extensive research, the nature of the hidden order phase transition in the heavy fermion superconductor URu2Si2 remains ambiguous. This study used scanning tunneling microscopy/spectroscopy to investigate different terminations of the parent URu2Si2 and Fe-doped samples. It was found that the small gap previously attributed to the hidden order parameter appeared in both the hidden order and large moment antiferromagnetic phases on the U terminations, indicating it is not unique to the hidden order parameter. Additionally, a peak-gap-peak structure was observed on the Si terminations. The changes in spectral features with Fe concentration and temperature suggest alterations in f-c hybridization. The higher vanishing temperatures and larger sizes of the gap in the Fe-substituted samples indicate stronger f-c hybridization compared to URu2Si2. These findings demonstrate that hybridization is not the driving force for the hidden order phase transition.
Article
Physics, Condensed Matter
Lichang Yin, Liqiang Che, Tian Le, Ye Chen, Yongjun Zhang, Hanoh Lee, Daniel Gnida, Joe D. Thompson, Dariusz Kaczorowski, Xin Lu
Summary: The study systematically investigates the hybridization between f and conduction electrons in heavy fermion compounds CeCoIn5, Ce2PdIn8, and Ce3PdIn11 through point-contact spectroscopy measurements. The results show an evolving Fano-like conductance shape below temperature T* in each compound, indicating the development of hybridization between local f and itinerant conduction electrons in the coherent heavy fermion state. A quantitative analysis using a two-channel model compares the tunneling process between normal metallic silver particles in a soft point-contact and heavy-fermion single crystals CeCoIn5, Ce2PdIn8, and Ce3PdIn11.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
Harim Jang, Vuong Thi Anh Hong, Jihyun Kim, Xin Lu, Tuson Park
Summary: The origin of the partial suppression of the electronic density states in the pseudogap behavior in high-Tc superconductivity has been controversial. This study investigates the quasiparticle scattering spectroscopy of the quantum critical superconductor CeCoIn5 and reveals the presence of a pseudogap with energy Ag. The results suggest that the pseudogap in CeCoIn5 is controlled by Kondo hybridization instead of being involved in the formation of superconducting Cooper pairs.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Daniel Rojas Pupo, Flavio Guimaraes Gandra, Luis Fernandez Barquin
Summary: The transport properties of the YbNi1-xCuxAl series of alloys were studied, and it was found that the change in Cu concentration has an impact on the electrical resistivity and specific heat of the alloys. These changes are attributed to the variation of the distance between Yb and transition metals and the different electronic properties of the transition metals.
Article
Materials Science, Multidisciplinary
M. C. Rahn, A. Gallagher, F. Orlandi, D. D. Khalyavin, C. Hoffmann, P. Manuel, R. Baumbach, M. Janoschek
Summary: The hidden order phase in URu2Si2 is highly sensitive to electronic doping, and the substitution of silicon with phosphorus can isolate the effects of tuning the chemical potential to some extent. This substitution induces a new antiferromagnetic phase with localized magnetic moments, and enhanced exchange interactions due to chemical pressure lead to magnetic order. Comparison with other tuning studies of URu2Si2 helps delineate the mechanisms by which silicon-to-phosphorus substitution affects the system.
Article
Crystallography
Mathieu Taupin, Silke Paschen
Summary: Strange metal behavior refers to a linear temperature dependence of the electrical resistivity that is not due to electron-phonon scattering. This phenomenon can be observed in various strongly correlated electron systems, and achieving a unified understanding of this behavior across different materials is a central problem in condensed matter physics.
Article
Chemistry, Multidisciplinary
Sumana Paul, Sanju Nandi, Mandira Das, Abhilasha Bora, Md Tarik Hossain, Subhradip Ghosh, P. K. Giri
Summary: In this study, ultrathin Bi2O2Se quantum dots with small size and strong visible fluorescence were synthesized using a top-down chemical approach. These quantum dots exhibited high optical band gap and fluorescence quantum yield in the green region, and were selective for detecting iron ions over a wide dynamic range with low detection limit. The mechanism of fluorescence and quenching induced by iron ions was investigated, and the synthesis method was proposed for potential applications in heavy metal ion sensing.
Article
Materials Science, Multidisciplinary
Nizar Lefi, Salem Neily, Roland Bonnet
Summary: This paper investigates the elastic field in a bi-material crystal with an angular dislocation line with one branch placed in the crystal and the other along a strongly bound or welded interface. The analysis formulates the elastic field of a closed dislocation loop and solves it using the knowledge of the Green's tensor of the bi-material. The study provides a faster calculation method and has important implications for solving interfacial angular dislocation problems.
PHILOSOPHICAL MAGAZINE
(2024)