Quadrupole Order in the Frustrated PyrochloreTb2+xTi2−xO7+y

2015/06/30 by Hiroshi Takatsu, H. Takatsu, Satoshi Onoda +20
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Crystallography #Hamiltonian (control theory) #Multiferroics and related materials #Nuclear materials and radiation effects #Order (exchange) #Physics #Pyrochlore #Quadrupole #Quantum mechanics #Spin ice #cond-mat.other #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.116.217201

5 pages, 5 figures, including Supplemental Material

arxiv created 2016/04/17 · openalex publication_date 2016/05/26 · arxiv updated 2016/06/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A hidden order that emerges in the frustrated pyrochlore Tb_2+xTi_2\ensuremath-xO_7+y with T_c=0.53 K is studied using specific heat, magnetization, and neutron scattering experiments on a high-quality single crystal. Semiquantitative analyses based on a pseudospin-1/2 Hamiltonian for ionic non-Kramers magnetic doublets demonstrate that it is an ordered state of electric quadrupole moments. The elusive spin liquid state of the nominal Tb₂Ti₂O₇ is most likely a U(1) quantum spin-liquid state.

Citations

• Crystal field states ofTb3+in the pyrochlore spin liquidTb2Ti2O7from neutron spectroscopy
• Quasi-Particles and Gauge Invariance in the Theory of Superconductivity
• Pyrochlore photons: TheU(1)spin liquid in aS=12three-dimensional frustrated magnet
• Dynamically Induced Frustration as a Route to a Quantum Spin Ice State inTb2Ti2O7via Virtual Crystal Field Excitations and Quantum Many-Body Effects
• Broken Symmetries and the Masses of Gauge Bosons
• Plasmons, Gauge Invariance, and Mass
• Spin Liquid State in an Organic Mott Insulator with a Triangular Lattice
• Co-operative Jahn-Teller effects
• Understanding paramagnetic spin correlations in the spin-liquid pyrochloreTb2Ti2O7