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Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe3 under Pressure
Physical Review Letters
  • Valentin Taufour, Ames Laboratory
  • Udhara S. Kaluarachchi, Iowa State University
  • Rustem Khasanov, Paul Scherrer Institute
  • Manh Cuong Nguyen, Ames Laboratory
  • Zurab Guguchia, Paul Scherrer Institute
  • Pabitra Kumar Biswas, Science and Technology Facilities Council
  • Pietro Bonfà, Università degli Studi di Ferrara
  • Roberto De Renzi, Università degli Studi di Ferrara
  • Xiao Lin, Iowa State University
  • Stella K. Kim, Iowa State University
  • Eun Deok Mun, Iowa State University
  • Hyunsoo Kim, Iowa State University
  • Yuji Furukawa, Iowa State University
  • Cai-Zhuang Wang, Ames Laboratory
  • Kai-Ming Ho, Iowa State University
  • Sergey L. Bud'ko, Iowa State University
  • Paul C. Canfield, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
7-15-2016
DOI
10.1103/PhysRevLett.117.037207
Abstract

The temperature-pressure phase diagram of the ferromagnet LaCrGe3 is determined for the first time from a combination of magnetization, muon-spin-rotation, and electrical resistivity measurements. The ferromagnetic phase is suppressed near 2.1 GPa, but quantum criticality is avoided by the appearance of a magnetic phase, likely modulated, AFMQ. Our density functional theory total energy calculations suggest a near degeneracy of antiferromagnetic states with small magnetic wave vectors Q allowing for the potential of an ordering wave vector evolving from Q=0 to finite Q, as expected from the most recent theories on ferromagnetic quantum criticality. Our findings show that LaCrGe3 is a very simple example to study this scenario of avoided ferromagnetic quantum criticality and will inspire further study on this material and other itinerant ferromagnets.

Comments

This article is from Phys. Rev. Lett. 117, 037207, doi:10.1103/PhysRevLett.117.037207. Posted with permission.

Copyright Owner
American Physical Society
Language
en
File Format
application/pdf
Citation Information
Valentin Taufour, Udhara S. Kaluarachchi, Rustem Khasanov, Manh Cuong Nguyen, et al.. "Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe3 under Pressure" Physical Review Letters Vol. 117 Iss. 3 (2016) p. 037207
Available at: http://works.bepress.com/paul_canfield/96/