Work

Impurity spin texture at a deconfined quantum critical point

Year: 2010

Type: article

Abstract: The spin texture surrounding a nonmagnetic impurity in a quantum antiferromagnet is a sensitive probe of the novel physics of a class of quantum phase transitions between a N\'eel ordered phase and a valence-bond solid phase in square lattice $S=1/2$ antiferromagnets. Using a newly developed $T=0$ quantum Monte Carlo technique, we compute this spin texture at these transitions and find that it does not obey the universal scaling form expected at a scale invariant quantum critical point. We also identify the precise logarithmic form of these scaling violations. Our results are expected to yield important clues regarding the probable theory of these unconventional transitions.

Source: Physical Review B

DOI: 10.1103/physrevb.82.155139

Authors: Argha Banerjee, Kedar Damle, Fabien Alet

Institutions: Tata Institute of Fundamental Research, Centre National de la Recherche Scientifique, Université Toulouse III - Paul Sabatier, Laboratoire de Physique Théorique, Université de Toulouse

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

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