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Title: Chiral Spin Order in Kondo-Heisenberg systems

Abstract

We demonstrate that Kondo-Heisenberg systems, consisting of itinerant electrons and localized magnetic moments (Kondo impurities), can be used as a principally new platform to realize scalar chiral spin order. The underlying physics is governed by a competition of the Ruderman-Kittel- Kosuya-Yosida (RKKY) indirect exchange interaction between the local moments with the direct Heisenberg one. When the direct exchange is weak and RKKY dominates the isotropic system is in the disordered phase. A moderately large direct exchange leads to an Ising-type phase transition to the phase with chiral spin order. Our nding paves the way towards pioneering experimental realizations of the chiral spin liquid in low dimensional systems with spontaneously broken time reversal symmetry.

Authors:
 [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Ludwig Maximilian Univ., Munich (Germany)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1412756
Alternate Identifier(s):
OSTI ID: 1413557
Report Number(s):
BNL-114729-2017-JA
Journal ID: ISSN 0031-9007; R&D Project: PO015; KC0202030; TRN: US1800348
Grant/Contract Number:  
SC0012704; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Tsvelik, A. M., and Yevtushenko, O. M. Chiral Spin Order in Kondo-Heisenberg systems. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.247203.
Tsvelik, A. M., & Yevtushenko, O. M. Chiral Spin Order in Kondo-Heisenberg systems. United States. doi:10.1103/PhysRevLett.119.247203.
Tsvelik, A. M., and Yevtushenko, O. M. Fri . "Chiral Spin Order in Kondo-Heisenberg systems". United States. doi:10.1103/PhysRevLett.119.247203. https://www.osti.gov/servlets/purl/1412756.
@article{osti_1412756,
title = {Chiral Spin Order in Kondo-Heisenberg systems},
author = {Tsvelik, A. M. and Yevtushenko, O. M.},
abstractNote = {We demonstrate that Kondo-Heisenberg systems, consisting of itinerant electrons and localized magnetic moments (Kondo impurities), can be used as a principally new platform to realize scalar chiral spin order. The underlying physics is governed by a competition of the Ruderman-Kittel- Kosuya-Yosida (RKKY) indirect exchange interaction between the local moments with the direct Heisenberg one. When the direct exchange is weak and RKKY dominates the isotropic system is in the disordered phase. A moderately large direct exchange leads to an Ising-type phase transition to the phase with chiral spin order. Our nding paves the way towards pioneering experimental realizations of the chiral spin liquid in low dimensional systems with spontaneously broken time reversal symmetry.},
doi = {10.1103/PhysRevLett.119.247203},
journal = {Physical Review Letters},
number = 24,
volume = 119,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

FIG. 1 FIG. 1: (color on-line) Competition between two different spin interactions in KHS: The spin on each lattice site is decomposed in terms of an orthonormal triad e1,2,3 (green arrows) with e⊥ = (−1)N(r)e3, see Eq.(3). The RKKY exchange interaction (red dashed lines) is mediated by electrons (red circles) and favoursmore » helical-like configuration of the vectors e1,2. The Heisenberg exchange interaction (blue dashed line) favours antiparallel orientation of e⊥ on neighboring lattice sites. Coupling constans JK,H are introduced in Eq.(2).« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.