General properties of phase diagrams of heavy-fermion metals

V. R. Shaginyan; A. Z. Msezane; K. G. Popov; G. S. Japaridze; V. A. Khodel

doi:10.1209/0295-5075/106/37001

All issues

Volume 106 / No 3 (May 2014)

EPL, 106 3 (2014) 37001

Abstract

Issue		EPL Volume 106, Number 3, May 2014


Article Number		37001
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/106/37001
Published online		05 May 2014

EPL, 106 (2014) 37001

General properties of phase diagrams of heavy-fermion metals

V. R. Shaginyan¹^,2^(a), A. Z. Msezane², K. G. Popov³, G. S. Japaridze² and V. A. Khodel⁴^,5

¹ Petersburg Nuclear Physics Institute - Gatchina, 188300, Russia
² Clark Atlanta University - Atlanta, GA 30314, USA
³ Komi Science Center, Ural Division, RAS - Syktyvkar, 167982, Russia
⁴ Russian Research Center Kurchatov Institute - Moscow, 123182, Russia
⁵ McDonnell Center for the Space Sciences & Department of Physics, Washington University St. Louis, MO 63130, USA

^(a) vrshag@thd.pnpi.spb.ru

Received: 26 March 2014
Accepted: 15 April 2014

Abstract

We study the temperature-magnetic field T-B phase diagrams of heavy-fermion (HF) metals, and show that at sufficiently high temperatures outside the ordered phase the crossover temperature $T^*(B)$ , regarded as the energy scale, follows a linear B-dependence, crossing the origin of the T-B phase diagram. This behavior of constitutes the general property, and is formed by the presence of the fermion condensation quantum phase transition hidden within the ordered phase. Our result is in good agreement with the experimental T-B phase diagram of the HF metals YbRh₂Si₂, Yb(Rh_0.93Co_0.07)₂Si₂, and Yb(Rh_0.94Ir_0.06)₂Si₂. To support our observations, we analyze the isothermal magnetization M, and demonstrate that $\text{d}M/\text{d}T$ exhibits a universal temperature behavior over magnetic field scaling. The obtained results are in good agreement with the corresponding data collected on YbRh₂Si₂ as a function of the magnetic field at different temperatures under hydrostatic pressure.

PACS: 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 64.70.Tg – Quantum phase transitions / 71.27.+a – Strongly correlated electron systems; heavy fermions

© EPLA, 2014

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.