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Title: Neutron diffraction in a model itinerant metal near aquantum critical point

Abstract

Neutron diffraction measurements on single crystals of Cr1−xVx (x=0, 0.02, 0.037) show that the ordering moment and the Neel temperature are continuously suppressed as x approaches 0.037, a proposed Quantum Critical Point (QCP). The wave vector Q of the spin density wave (SDW) becomes more incommensurate as x increases in accordance with the two band model. At xC=0.037 we have found temperature dependent, resolution limited elastic scattering at 4 incommensurate wave vectors Q=(1 1,2, 0, 0)*2/a, which correspond to 2 SDWs with Neel temperatures of 19 K and 300 K. Our neutron diffraction measurements indicate that the electronic structure of Cr is robust, and that tuning Cr to its QCP results not in the suppression of antiferromagnetism, but instead enables new spin ordering due to novel nesting of the Fermi surface of Cr.

Authors:
 [1];  [1];  [2];  [2];  [3];  [3]
  1. Brookhaven National Laboratory (BNL)
  2. National Institute of Standards and Technology (NIST)
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
979154
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Journal of Physics Conference Series
Additional Journal Information:
Journal Volume: 150; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIFERROMAGNETISM; ELASTIC SCATTERING; ELECTRONIC STRUCTURE; FERMI LEVEL; MONOCRYSTALS; NEEL TEMPERATURE; NEUTRON DIFFRACTION; RESOLUTION; SPIN; TUNING; VECTORS

Citation Formats

Sokolov, D A, Aronson, Meigan C., Erwin, R, Lynn, J. W., Lumsden, Mark D, and Nagler, Stephen E. Neutron diffraction in a model itinerant metal near aquantum critical point. United States: N. p., 2009. Web. doi:10.1088/1742-6596/150/4/042189.
Sokolov, D A, Aronson, Meigan C., Erwin, R, Lynn, J. W., Lumsden, Mark D, & Nagler, Stephen E. Neutron diffraction in a model itinerant metal near aquantum critical point. United States. https://doi.org/10.1088/1742-6596/150/4/042189
Sokolov, D A, Aronson, Meigan C., Erwin, R, Lynn, J. W., Lumsden, Mark D, and Nagler, Stephen E. 2009. "Neutron diffraction in a model itinerant metal near aquantum critical point". United States. https://doi.org/10.1088/1742-6596/150/4/042189.
@article{osti_979154,
title = {Neutron diffraction in a model itinerant metal near aquantum critical point},
author = {Sokolov, D A and Aronson, Meigan C. and Erwin, R and Lynn, J. W. and Lumsden, Mark D and Nagler, Stephen E},
abstractNote = {Neutron diffraction measurements on single crystals of Cr1−xVx (x=0, 0.02, 0.037) show that the ordering moment and the Neel temperature are continuously suppressed as x approaches 0.037, a proposed Quantum Critical Point (QCP). The wave vector Q of the spin density wave (SDW) becomes more incommensurate as x increases in accordance with the two band model. At xC=0.037 we have found temperature dependent, resolution limited elastic scattering at 4 incommensurate wave vectors Q=(1 1,2, 0, 0)*2/a, which correspond to 2 SDWs with Neel temperatures of 19 K and 300 K. Our neutron diffraction measurements indicate that the electronic structure of Cr is robust, and that tuning Cr to its QCP results not in the suppression of antiferromagnetism, but instead enables new spin ordering due to novel nesting of the Fermi surface of Cr.},
doi = {10.1088/1742-6596/150/4/042189},
url = {https://www.osti.gov/biblio/979154}, journal = {Journal of Physics Conference Series},
number = 4,
volume = 150,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}