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15 papers · 2 filters
Survival of magnetic correlations above ordering temperature in a ferromagnetically ordered classical kagomé magnet: Li9Cr3(P2O7)3(PO4)2
R. Kumar, A. Chakraborty, S. Fukuoka +4
Motivated by the recent discovery of a semiclassical nematic spin liquid state in a Heisenberg kagomé antiferromagnet Li9Fe3(P2O7)3(PO4)2 (LFPO) with S=5/2 [Kermarrec et al. Phys.…
Role of crystal field ground state in the classical spin-liquid behavior of a quasi-one dimensional spin-chain system Sr3NiPtO6
V. K. Anand, D. T. Adroja, S. Rayaprol +5
The spin-chain compound Sr3NiPtO6 is known to have a nonmagnetic ground state. We have investigated the nature of ground state of Sr3NiPtO6 using magnetic susceptibility , he…
Competition between Neel, Haldane nematic, plaquette valence bond solid, and valence bond solid phases in SU(N) analogs of square-lattice antiferromagnets
Souvik Kundu, Nisheeta Desai, Kedar Damle
We use stochastic series expansion (SSE) quantum Monte Carlo (QMC) methods to study the phases and transitions displayed by a class of sign-free designer Hamiltonians for SU() a…
Fate of Bosonic Topological Edge Modes in the Presence of Many-Body Interactions
Niclas Heinsdorf, Darshan G. Joshi, Hosho Katsura +1
Many magnetic materials are predicted to exhibit bosonic topological edge modes in their excitation spectra, because of the nontrivial topology of their magnon, triplon, or other q…
Non-centrosymmetric, transverse structural modulation in SrAl4, and elucidation of its origin in the BaAl4 family of compounds
Sitaram Ramakrishnan, Surya Rohith Kotla, Hanqi Pi +13
At ambient conditions SrAl4 adopts the BaAl4 structure type with space group I4/mmm. It undergoes a charge-density-wave (CDW) transition at TCDW = 243 K, followed by a structural t…
Strong coupling of lattice and orbital excitations in quantum magnet CaCrO: Anomalous temperature dependence of Raman phonons
Srishti Pal, Arnab Seth, Anzar Ali +4
We report low-temperature Raman signatures of the Heisenberg quantum magnet CaCrO, showing clear anomalies in phonon mode frequencies and linewidths below 1…
Annealing-induced long-range charge density wave order in magnetic kagome FeGe: fluctuations and disordered structure
Chenfei Shi, Yi Liu, Bishal Baran Maity +18
Charge density wave (CDW) in kagome materials with the geometric frustration is able to carry unconventional characteristics. Recently, a CDW has been observed below the antiferrom…
Deconfined pseudocriticality in a model spin-1 quantum antiferromagnet
Vikas Vijigiri, Sumiran Pujari, Nisheeta Desai
Berry phase interference arguments that underlie the theory of deconfined quantum criticality (DQC) for spin- antiferromagnets have also been invoked to allow for cont…
Quantum fluctuations lead to glassy electron dynamics in the good metal regime of electron doped KTaO3
Shashank Kumar Ojha, Sankalpa Hazra, Surajit Bera +10
One of the central challenges in condensed matter physics is to comprehend systems that have strong disorder and strong interactions. In the strongly localized regime, their subtle…
Canting angle behavior of magnetic moments in Y- substituted Tb2BaNiO5 and its relevance for magnetoelectric coupling
Ram Kumar, S. Rayaprol, A. Hoser +1
The Haldane-spin chain compound, Tb2BaNiO5, has been known to be an exotic multiferroic system, exhibiting antiferromagnetic anomalies at T_N1= 63 K and T_N2= 25 K, with ferroelect…
Realization of Z Topological Metal in Single-Crystalline Nickel Deficient NiVSe
Sitaram Ramakrishnan, Shidaling Matteppanavar, Andreas Schonleber +6
Temperature-dependent electronic and magnetic properties are reported for a Z2 topological metal single-crystalline nickel-deficient NiVSe. It is found to crystallize in th…
Layer-resolved electronic behavior in a Kondo lattice system, CeAgAs2
Sawani Datta, Ram Prakash Pandeya, Arka Bikash Dey +6
We investigate the electronic structure of an antiferromagnetic Kondo lattice system CeAgAs2 employing hard x-ray photoemission spectroscopy. CeAgAs2, an orthorhombic variant of Hf…
High spin-polarization in a disordered novel quaternary Heusler alloy FeMnVGa
Shuvankar Gupta, Sudip Chakraborty, Vidha Bhasin +10
In this work, we report the successful synthesis of a Fe-based novel half-metallic quaternary Heusler alloy FeMnVGa and its structural, magnetic and transport properties probed thr…
Evidence of The Anomalous Fluctuating Magnetic State by Pressure Driven 4f Valence Change in EuNiGe
K. Chen, C. Luo, Y. Zhao F. Baudelet +5
In rare-earth compounds with valence fluctuation, the proximity of the 4f level to the Fermi energy leads to instabilities of the charge configuration and the magnetic moment. Here…
Uncovering the nature of transient and metastable non-equilibrium phases in 1-TaS
Tanusree Saha, Arindam Pramanik, Barbara Ressel +7
Complex systems are characterized by strong coupling between different microscopic degrees of freedom. Photoexcitation of such materials can drive them into new transient and long-…