skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Constraints on the merging of the transition lines at the tricritical point in a wing-structure phase diagram

Abstract

Here, we consider the phase diagram of a ferromagnetic system driven to a quantum phase transition with a tuning parameter $p$. Before being suppressed, the transition becomes of the first order at a tricritical point, from which wings emerge under application of the magnetic field H in the T $-$ p $-$ H phase diagram. We show that the edge of the wings merge with tangent slopes at the tricritical point.

Authors:
 [1];  [2];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1342906
Report Number(s):
IS-J-9082
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701707
Grant/Contract Number:
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Taufour, Valentin, Kaluarachchi, Udhara S., and Kogan, Vladimir G. Constraints on the merging of the transition lines at the tricritical point in a wing-structure phase diagram. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.060410.
Taufour, Valentin, Kaluarachchi, Udhara S., & Kogan, Vladimir G. Constraints on the merging of the transition lines at the tricritical point in a wing-structure phase diagram. United States. doi:10.1103/PhysRevB.94.060410.
Taufour, Valentin, Kaluarachchi, Udhara S., and Kogan, Vladimir G. 2016. "Constraints on the merging of the transition lines at the tricritical point in a wing-structure phase diagram". United States. doi:10.1103/PhysRevB.94.060410. https://www.osti.gov/servlets/purl/1342906.
@article{osti_1342906,
title = {Constraints on the merging of the transition lines at the tricritical point in a wing-structure phase diagram},
author = {Taufour, Valentin and Kaluarachchi, Udhara S. and Kogan, Vladimir G.},
abstractNote = {Here, we consider the phase diagram of a ferromagnetic system driven to a quantum phase transition with a tuning parameter $p$. Before being suppressed, the transition becomes of the first order at a tricritical point, from which wings emerge under application of the magnetic field H in the T $-$ p $-$ H phase diagram. We show that the edge of the wings merge with tangent slopes at the tricritical point.},
doi = {10.1103/PhysRevB.94.060410},
journal = {Physical Review B},
number = 6,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:
  • We present unambiguous evidence, from lattice simulations of QCD with three degenerate quark species, for two tricritical points in the (T,m) phase diagram at fixed imaginary chemical potential {mu}/T=i{pi}/3 mod2{pi}/3, one in the light and one in the heavy mass regime. These represent the boundaries of the chiral and deconfinement critical lines continued to imaginary {mu}, respectively. It is demonstrated that the shape of the deconfinement critical line for real chemical potentials is dictated by tricritical scaling and implies the weakening of the deconfinement transition with real chemical potential. The generalization to nondegenerate and light quark masses is discussed.
  • In pulsed magnetic fields up to 65 T and at temperatures below the Néel transition, our magnetization and magnetostriction measurements reveal a field-induced metamagneticlike transition that is suggestive of an antiferromagnetic to ferrimagnetic ordering. Our data also suggest a change in the nature of this metamagneticlike transition from second- to first-order-like near a tricritical point at T tc~145K and H c~52T. At high fields for H > H c we found a decreased magnetic moment roughly half of the moment determined by neutron powder diffraction. Here, we propose that the decreased moment and lack of saturation at high fields indicatemore » the presence of a field-induced ferrimagnetic state above the tricritical point of the H-T phase diagram for USb 2.« less
  • We report the temperature-pressure-magnetic eld phase diagram of the ferromagnetic Kondolattice CeTiGe 3 determined by means of electrical resistivity measurements. Measurements up to ~5.8GPa reveal a rich phase diagram with multiple phase transitions. At ambient pressure, CeTiGe 3 orders ferromagnetically at T C =14 K. Application of pressure suppresses T C, but a pressure induced ferromagnetic quantum criticality is avoided by the appearance of two new successive transitions for p>4.1GPa that are probably antiferromagnetic in nature. These two transitions are suppressed under pressure, with the lower temperature phase being fully suppressed above 5.3GPa. The critical pressures for the presumed quantummore » phase transitions are p1≅4.1GPa and p2≅5.3GPa. Above 4.1GPa, application of magnetic eld shows a tricritical point evolving into a wing structure phase with a quantum tricritical point at 2.8T at 5.4GPa, where the rst order antiferromagneticferromagnetic transition changes into the second order antiferromagnetic-ferromagnetic transition.« less