This article reviews the unconventional effects of random disorder on magnetic quantum phase transitions, focusing on a number of new experimental and theoretical developments during the last three years. On the theory side, we address smeared quantum phase transitions tuned by changing the chemical composition, for example in alloys of the type A1-xBx. We also discuss how the interplay of order parameter conservation and overdamped dynamics leads to enhanced quantum Griffiths singularities in disordered metallic ferromagnets. Finally, we discuss a semiclassical theory of transport properties in quantum Griffiths phases. Experimental examples include the ruthenates Sr1-xCaxRuO3 and (Sr1-xCax)3Ru2O7 as well as Ba(Fe1-xMnx)2As2.

Meeting Name

17th International Conference on Recent Progress in Many-Body Theories (2013: Sep. 8-13, Rostock, Germany)



Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Physics; Chemical Compositions; Magnetic Quantum Phase Transition; Metallic Ferromagnets; Quantum Griffiths Singularity; Quantum Phase Transitions; Random Disorders; Semiclassical Theories; Theoretical Development; Phase Transitions

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





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Creative Commons Licensing

Creative Commons License
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Publication Date

01 Sep 2014