title: Fermi surface reconstruction and multiple quantum phase transitions in the antiferromagnet CeRhIn5.
abstract: Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of the specific microscopic details of a material. However, many current studies focus on materials that exhibit quantum-driven continuous phase transitions (quantum critical points, or QCPs) at absolute zero temperature. The classification of such QCPs and the question of whether they show universal behavior remain open issues. Here we report measurements of heat capacity and de Haas-van Alphen (dHvA) oscillations at low temperatures across a field-induced antiferromagnetic QCP (Bc0 ≈ 50 T) in the heavy-fermion metal CeRhIn5. A sharp, magnetic-field-induced change in Fermi surface is detected both in the dHvA effect and Hall resistivity at B0* ≈ 30 T, well inside the antiferromagnetic phase. Comparisons with band-structure calculations and properties of isostructural CeCoIn5 suggest that the Fermi-surface change at B0* is associated with a localized-to-itinerant transition of the Ce-4f electrons in CeRhIn5. Taken in conjunction with pressure experiments, our results demonstrate that at least two distinct classes of QCP are observable in CeRhIn5, a significant step toward the derivation of a universal phase diagram for QCPs.
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Lin
authors.initials: L
authors.lastname: Jiao
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Ye
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: Yoshimitsu
authors.initials: Y
authors.lastname: Kohama
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310;
authors.forename: David
authors.initials: D
authors.lastname: Graf
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: E D
authors.initials: ED
authors.lastname: Bauer
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: John
authors.initials: J
authors.lastname: Singleton
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: Jian-Xin
authors.initials: JX
authors.lastname: Zhu
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Zongfa
authors.initials: Z
authors.lastname: Weng
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Guiming
authors.initials: G
authors.lastname: Pang
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Tian
authors.initials: T
authors.lastname: Shang
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Jinglei
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China;
authors.forename: Han-Oh
authors.initials: HO
authors.lastname: Lee
authors.affiliation: Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea;
authors.forename: Tuson
authors.initials: T
authors.lastname: Park
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: Marcelo
authors.initials: M
authors.lastname: Jaime
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545;
authors.forename: J D
authors.initials: JD
authors.lastname: Thompson
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China; Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany;
authors.forename: Frank
authors.initials: F
authors.lastname: Steglich
authors.affiliation: Department of Physics and Astronomy, Rice University, Houston, TX 77005; and hqyuan@zju.edu.cn qmsi@rice.edu.
authors.forename: Qimiao
authors.initials: Q
authors.lastname: Si
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310058, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China hqyuan@zju.edu.cn qmsi@rice.edu.
authors.forename: H Q
authors.initials: HQ
authors.lastname: Yuan
keywords: Fermi surface reconstruction; heavy fermion; localized-itinerant transition; quantum phase transitions; superconductivity