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15 papers · 2 filters
Structural Evolution and Onset of the Density Wave Transition in the CDW Superconductor LaPtSi Clarified with Synchrotron XRD
Elisabetta Nocerino, Irene San Lorenzo, Konstantinos Papadopulos +11
The quasi-2D Pt-based rare earth intermetallic material LaPtSi has attracted attention as it exhibits strong interplay between charge density wave (CDW) and and superconduc…
Excitonic Metal and Non-Fermi Liquid Behaviour in Twisted Double Bilayer Graphene near Charge Neutrality
Unmesh Ghorai, Ayan Ghosh, Anindya Das +1
Twisted double bilayer graphene is a compensated semi-metal near the charge neutrality point with the presence of small electron and hole pockets in its band structure. We show tha…
Spin density wave, Fermi liquid, and fractionalized phases in a theory of antiferromagnetic metals using paramagnons and bosonic spinons
Alexander Nikolaenko, Jonas von Milczewski, Darshan G. Joshi +1
The pseudogap metal phase of the hole-doped cuprates can be described by small Fermi surfaces of electron-like quasiparticles, which enclose a volume violating the Luttinger relati…
Coupling between colossal charge density wave ordering and magnetism in Ho2Ir3Si5
Sitaram Ramakrishnan, Jin-Ke Bao, Claudio Eisele +14
Ho2Ir3Si5 belongs to the family of three-dimensional (3D) R2Ir3Si5 (R = Lu, Er and Ho) compounds that exhibit a colossal first-order charge density wave (CDW) transition where ther…
Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi
Md Shahin Alam, Amar Fakhredine, Mujeeb Ahmed +9
We report the anomalous Hall effect (AHE) and the anomalous Nernst effect (ANE) data for the non-collinear Weyl semimetal CeAlSi. The anomalous Hall conductivity (σ_ij^A) was measu…
Jordan-Wigner fermionization of quantum spin systems on arbitrary 2D lattices: A mutual Chern-Simons approach
Jagannath Das, Aman Kumar, Avijit Maity +1
A variety of analytical approaches have been developed for the study of quantum spin systems in two dimensions, the notable ones being spin-waves, slave boson/fermion parton constr…
Thermal Hall conductivity near field-suppressed magnetic order in a Kitaev-Heisenberg model
Aman Kumar, Vikram Tripathi
We investigate thermal Hall conductivity of a - Kitaev-Heisenberg model with a Zeeman field in the direction in the light of the recent debate surrounding th…
Magnetic-field induced melting of long-range magnetic order akin to Kitaev insulators in the metallic compound Tb5Si3
S. Rayaprol, K. K. Iyer, A. Hoser +5
There have been constant efforts to find exotic quantum spin-liquid (QSL) materials. Some of the transition metal insulators dominated by the direction dependent anisotropic exchan…
Notes on resummation-based quantum Monte Carlo vis-à-vis sign-problematic Heisenberg models on canonical geometrically frustrated lattices
Nisheeta Desai, Sumiran Pujari
We show here that a direct application of resummation-based quantum Monte Carlo (QMC) -- implemented recently for sign-problem-free SU(2)-symmetric Hamiltonians in the stochastic s…
Analysis of the unconventional chiral fermions in a non-centrosymmetric chiral crystal
Vikas Saini, Souvik Sasmal, Ruta Kulkarni +2
Symmetry-protected non-trivial states in chiral topological materials hold immense potential for fundamental science and technological advances. Here, we report electrical transpor…
Anyon dynamics in field-driven phases of the anisotropic Kitaev model
Shi Feng, Adhip Agarwala, Subhro Bhattacharjee +1
The Kitaev model on a honeycomb lattice with bond-dependent Ising interactions offers an exactly solvable model of a quantum spin liquid (QSL) with gapped fluxes and gapless…
Giant spectral renormalization and complex hybridization physics in a Kondo lattice system, CeCuSb2
Sawani Datta, Ram Prakash Pandeya, Arka Bikash Dey +6
We investigate the electronic structure of a Kondo lattice system, CeCuSb2 exhibiting significant mass enhancement and Kondo-type behavior. We observe multiple features in the hard…
Orthorhombic charge density wave on the tetragonal lattice of EuAl4
Sitaram Ramakrishnan, Surya Rohith Kotla, Toms Rekis +13
EuAl4 possesses the BaAl4 crystal structure type with tetragonal symmetry I4/mmm. It undergoes a charge-density-wave (CDW) transition at TCDW = 145 K and it features four consecuti…
Probing emergent QED in quantum spin ice via Raman scattering of phonons: shallow inelastic scattering and pair production
Arnab Seth, Subhro Bhattacharjee, Roderich Moessner
We present a new mechanism for Raman scattering of phonons, which is based on the linear magnetoelastic coupling present in non-Kramers magnetic ions. This provides a direct coupli…
Theory of collective topologically-protected Majorana fermion excitations of networks of localized Majorana modes
Kedar Damle
Predictions of localized Majorana modes, and ideas for manipulating these degrees of freedom, are the two key ingredients in proposals for physical platforms for Majorana quantum c…