Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 50: Quantum-Critical Phenomena I
TT 50.7: Vortrag
Mittwoch, 14. März 2018, 11:00–11:15, H 3005
High field NMR near the field induced quantum phase transition in CeRhIn5 — •Guilherme G. Lesseux1,2, Taisuke Hattori3, Hironori Sakai3, Yo Tokunaga3, Shinsaku Kambe3, Philip Kuhns4, Arneil Reyes4, Pascoal J. G. Pagliuso1, and Ricardo R. Urbano1 — 1"Gleb Wataghin" Institute of Physics - University of Campinas, Campinas, Brazil — 21. Physikalisches Institut - Universität Stuttgart, Stuttgart, Germany — 3Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, Japan — 4National High Magnetic Field Laboratoy - Florida State University, Tallahassee, USA
We report on the first low temperature and high field 115In NMR measurements on CeRhIn5 through its magnetic field induced transition at B* ∼ 30 T (0.5 K) near the quantum critical point at Bc0 ∼ 50 T. With the magnetic field applied along c-axis and within the limit of the signal-to-noise ratio, no remarkable change of the spectral shape of the planar In(1) signal was observed in the range 2 T < B||c < 39 T, indicating no significant change of the magnetic structure. Moreover, the formal shift for the In(1) transitions was found to be virtually constant from the lowest measured field (2 T) up to 29 T although its value revealed a noticeable change through 30 T. Our results are the first microscopic evidence of the high field induced Fermi surface reconstruction in CeRhIn5 suggested in previous reports based on quantum oscilations.