English  |  正體中文  |  简体中文  |  Post-Print筆數 : 20 |  Items with full text/Total items : 90029/119959 (75%)
Visitors : 24039399      Online Users : 145
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/104680

    Title: Properties of the random-singlet phase: From the disordered Heisenberg chain to an amorphous valence-bond solid
    Authors: 柯志緯;林瑜琤
    Shu, Yu-Rong;Yao, Dao-Xin;Ke, Chih-Wei;Lin, Yu-Cheng;Sandvik, Anders W.
    Contributors: 應物所
    Date: 2016-11
    Issue Date: 2016-12-08 15:08:44 (UTC+8)
    Abstract: We use a strong-disorder renormalization group (SDRG) method and ground-state quantum Monte Carlo (QMC) simulations to study S=1/2 spin chains with random couplings, calculating disorder-averaged spin and dimer correlations. The QMC simulations demonstrate logarithmic corrections to the power-law decaying correlations obtained with the SDRG scheme. The same asymptotic forms apply both for systems with standard Heisenberg exchange and for certain multispin couplings leading to spontaneous dimerization in the clean system. We show that the logarithmic corrections arise in the valence-bond (singlet pair) basis from a contribution that cannot be generated by the SDRG scheme. In the model with multispin couplings, where the clean system dimerizes spontaneously, random singlets form between spinons localized at domain walls in the presence of disorder. This amorphous valence-bond solid is asymptotically a random-singlet state and only differs from the random-exchange Heisenberg chain in its short-distance properties.
    Relation: Physical Review B, Vol.94, pp.174442(1-14)
    Data Type: article
    DOI 連結: https://dx.doi.org/10.1103/PhysRevB.94.174442
    DOI: 10.1103/PhysRevB.94.174442
    Appears in Collections:[應用物理研究所 ] 期刊論文

    Files in This Item:

    File Description SizeFormat
    PhysRevB.94.pdf2141KbAdobe PDF364View/Open

    All items in 政大典藏 are protected by copyright, with all rights reserved.

    社群 sharing

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback