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Title: Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet

Abstract

When spins are arranged in a lattice of triangular motif, the phenomenon of frustration leads to numerous energetically equivalent ground states, and results in exotic states such as spin liquid and spin ice. Here we report an alternative situation: a system, classically a liquid, freezes in the clean limit into a glassy state induced by quantum fluctuations. We call such glassy state a spin jam. The case in point is a frustrated magnet, where spins are arranged in a triangular network of bipyramids. Quantum corrections break the classical degeneracy into a set of aperiodic spin configurations forming local minima in a rugged energy landscape. This is established by mapping the problem into tiling with hexagonal tiles. The number of tessellations scales with the boundary length rather than its volume, showing the absence of local zero-energy modes. Low-temperature thermodynamics is discussed to compare it with other glassy materials.

Authors:
 [1];  [1];  [1]
  1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of Virginia, Charlottesville, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1623936
Grant/Contract Number:  
FG02-07ER46384; FG02-10ER46384; DMR-0956053
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Condensed-matter physics; Theoretical physics; Thermodynamics

Citation Formats

Klich, I., Lee, S.-H., and Iida, K. Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet. United States: N. p., 2014. Web. doi:10.1038/ncomms4497.
Klich, I., Lee, S.-H., & Iida, K. Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet. United States. https://doi.org/10.1038/ncomms4497
Klich, I., Lee, S.-H., and Iida, K. Tue . "Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet". United States. https://doi.org/10.1038/ncomms4497. https://www.osti.gov/servlets/purl/1623936.
@article{osti_1623936,
title = {Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet},
author = {Klich, I. and Lee, S.-H. and Iida, K.},
abstractNote = {When spins are arranged in a lattice of triangular motif, the phenomenon of frustration leads to numerous energetically equivalent ground states, and results in exotic states such as spin liquid and spin ice. Here we report an alternative situation: a system, classically a liquid, freezes in the clean limit into a glassy state induced by quantum fluctuations. We call such glassy state a spin jam. The case in point is a frustrated magnet, where spins are arranged in a triangular network of bipyramids. Quantum corrections break the classical degeneracy into a set of aperiodic spin configurations forming local minima in a rugged energy landscape. This is established by mapping the problem into tiling with hexagonal tiles. The number of tessellations scales with the boundary length rather than its volume, showing the absence of local zero-energy modes. Low-temperature thermodynamics is discussed to compare it with other glassy materials.},
doi = {10.1038/ncomms4497},
journal = {Nature Communications},
number = 1,
volume = 5,
place = {United States},
year = {Tue Apr 01 00:00:00 EDT 2014},
month = {Tue Apr 01 00:00:00 EDT 2014}
}

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Works referencing / citing this record:

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