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102 papers · 1 filter
Low temperature magnetic structure and lattice response in SmCuAs
M. G. Kim, C. Neupane, Y. Yu +6
We investigated the structural and magnetic properties of single-crystalline SmCuAs using high-resolution synchrotron X-ray diffraction and X-ray resonant magnetic scattering (…
Phase transitions on the dark side of the Gross-Neveu model: Spontaneous symmetry breaking at repulsive coupling
Gabriel Osiander Rein, Fakher F. Assaad, Igor F. Herbut
Gross-Neveu model in 2+1 dimensions exhibits a continuous transition from gapless Dirac semimetal to the gapped quantum anomalous Hall (QAH) insulator at a finite (attractive) coup…
Coexistence of anomalous spin dynamics and weak magnetic order in a chiral trillium lattice K2FeSn(PO4)3
J. Khatua, S. Krishnamoorthi, Changhyun Koo +13
Trillium lattices, where magnetic ions form a three-dimensional chiral network of corner-sharing equilateral triangular motifs, offer a prominent platform to explore exotic quantum…
Beyond one-loop calculation: Higher-order effects on Gross-Neveu-Yukawa tensorial criticality
SangEun Han, Igor F. Herbut
We study the Gross-Neveu-Yukawa field theory for the SO() symmetric traceless rank-two tensor order parameter coupled to Majorana fermions using the -expansion around upper c…
Quantum multicriticality and emergent symmetry in Dirac systems with two order parameters at three-loop order
Max Uetrecht, Igor F. Herbut, Michael M. Scherer +2
Two-dimensional materials with interacting Dirac excitations can host quantum multicritical behavior near the phase boundaries of the semimetallic and two-ordered phases. We study…
Spin dynamics and 1/3 magnetization plateau in a coupled distorted diamond chain compound K2Cu3(MoO4)4
G. Senthil Murugan, J. Khatua, Suyoung Kim +11
We investigate magnetic properties of the = 1/2 compound KCu(MoO) by combining magnetic susceptibility, magnetization, specific heat, and electron spin…