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Title: Ferromagnetic quantum critical point avoided by the appearance of another magnetic phase in LaCrGe 3 under pressure

Abstract

Here, the temperature-pressure phase diagram of the ferromagnet LaCrGe 3 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 LaCrGe 3 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.

Authors:
 [1];  [1];  [2];  [1];  [2];  [3];  [4];  [4];  [5];  [1];  [5];  [5];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  3. STFC Rutherford Appleton Lab., Oxfordshire (United Kingdom)
  4. Parco Area delle Scienze, Parma (Italy)
  5. Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1321914
Alternate Identifier(s):
OSTI ID: 1262444
Report Number(s):
IS-J-9021
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC02-07CH11358; FA9550-09-1-0603
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 3; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 36 MATERIALS SCIENCE

Citation Formats

Taufour, Valentin, Kaluarachchi, Udhara S., Khasanov, Rustem, Nguyen, Manh Cuong, Guguchia, Zurab, Biswas, Pabitra Kumar, Bonfa, Pietro, De Renzi, Roberto, Lin, Xiao, Kim, Stella K., Mun, Eun Deok, Kim, Hyunsoo, Furukawa, Yuji, Wang, Cai -Zhuang, Ho, Kai -Ming, Bud’ko, Sergey L., and Canfield, Paul C.. Ferromagnetic quantum critical point avoided by the appearance of another magnetic phase in LaCrGe3 under pressure. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.037207.
Taufour, Valentin, Kaluarachchi, Udhara S., Khasanov, Rustem, Nguyen, Manh Cuong, Guguchia, Zurab, Biswas, Pabitra Kumar, Bonfa, Pietro, De Renzi, Roberto, Lin, Xiao, Kim, Stella K., Mun, Eun Deok, Kim, Hyunsoo, Furukawa, Yuji, Wang, Cai -Zhuang, Ho, Kai -Ming, Bud’ko, Sergey L., & Canfield, Paul C.. Ferromagnetic quantum critical point avoided by the appearance of another magnetic phase in LaCrGe3 under pressure. United States. doi:10.1103/PhysRevLett.117.037207.
Taufour, Valentin, Kaluarachchi, Udhara S., Khasanov, Rustem, Nguyen, Manh Cuong, Guguchia, Zurab, Biswas, Pabitra Kumar, Bonfa, Pietro, De Renzi, Roberto, Lin, Xiao, Kim, Stella K., Mun, Eun Deok, Kim, Hyunsoo, Furukawa, Yuji, Wang, Cai -Zhuang, Ho, Kai -Ming, Bud’ko, Sergey L., and Canfield, Paul C.. Wed . "Ferromagnetic quantum critical point avoided by the appearance of another magnetic phase in LaCrGe3 under pressure". United States. doi:10.1103/PhysRevLett.117.037207. https://www.osti.gov/servlets/purl/1321914.
@article{osti_1321914,
title = {Ferromagnetic quantum critical point avoided by the appearance of another magnetic phase in LaCrGe3 under pressure},
author = {Taufour, Valentin and Kaluarachchi, Udhara S. and Khasanov, Rustem and Nguyen, Manh Cuong and Guguchia, Zurab and Biswas, Pabitra Kumar and Bonfa, Pietro and De Renzi, Roberto and Lin, Xiao and Kim, Stella K. and Mun, Eun Deok and Kim, Hyunsoo and Furukawa, Yuji and Wang, Cai -Zhuang and Ho, Kai -Ming and Bud’ko, Sergey L. and Canfield, Paul C.},
abstractNote = {Here, 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.},
doi = {10.1103/PhysRevLett.117.037207},
journal = {Physical Review Letters},
number = 3,
volume = 117,
place = {United States},
year = {2016},
month = {7}
}

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Works referenced in this record:

Projector augmented-wave method
journal, December 1994


From ultrasoft pseudopotentials to the projector augmented-wave method
journal, January 1999


Self-Consistent Equations Including Exchange and Correlation Effects
journal, November 1965


Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set
journal, July 1996


Special points for Brillouin-zone integrations
journal, June 1976

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