Quantum critical scaling in the disordered itinerant ferromagnet UCo1-xFexGe

Huang, Kevin; Eley, Serena Merteen; Civale, Leonardo; Bauer, Eric Dietzgen; Baumbach, Ryan E.; Maple, M. Brian; Janoschek, Marc

doi:10.1103/PhysRevLett.117.237202

Title: Quantum critical scaling in the disordered itinerant ferromagnet UCo_1-xFe_xGe

Journal Article · Wed Nov 30 00:00:00 EST 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.117.237202· OSTI ID:1345933

Huang, Kevin ^[1];

^[2];

^[2]; Baumbach, Ryan E. ^[2]; Maple, M. Brian ^[3];

^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, San Diego, CA (United States). Dept. of Physics
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of California, San Diego, CA (United States). Dept. of Physics

The Belitz-Kirkpatrick-Vojta (BKV) theory shows in excellent agreement with experiment that ferromagnetic quantum phase transitions (QPTs) in clean metals are generally first order due to the coupling of the magnetization to electronic soft modes, in contrast to the classical analogue that is an archetypical second-order phase transition. For disordered metals the BKV theory predicts that the secondorder nature of the QPT is restored because the electronic soft modes change their nature from ballistic to diffusive. Lastly, our low-temperature magnetization study identifies the ferromagnetic QPT in the disordered metal UCo_1$$-$$xFe_xGe as the first clear example that exhibits the associated critical exponents predicted by the BKV theory.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-06NA25396; FG02-04ER46105

OSTI ID:: 1345933

Alternate ID(s):: OSTI ID: 1333982

Report Number(s):: LA-UR-16-26014; TRN: US1701192

Journal Information:: Physical Review Letters, Vol. 117, Issue 23; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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