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Dynamics and Transport in Random Antiferromagnetic Spin Chains

Damle, Kedar and Motrunich, Olexei and Huse, David A. (2000) Dynamics and Transport in Random Antiferromagnetic Spin Chains. Physical Review Letters, 84 (15). pp. 3434-3437. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:DAMprl00

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Abstract

We present the first results on the low-frequency dynamical and transport properties of random antiferromagnetic spin chains at low temperature (T). We obtain the momentum and frequency dependent dynamic structure factor in the random singlet (RS) phases of both spin-1/2 and spin-1 chains, as well as in the random dimer phase of spin-1/2 chains. We also show that the RS phases are unusual “spin-metals” with divergent low-frequency conductivity at T = 0, and follow the spin conductivity through “metal-insulator” transitions tuned by the strength of dimerization or Ising anisotropy in the spin-1/2 case and by the strength of disorder in the spin-1 case.


Item Type:Article
ORCID:
AuthorORCID
Motrunich, Olexei0000-0001-8031-0022
Additional Information:© 2000 The American Physical Society. Received 15 November 1999. We thank P.W. Anderson, R.N. Bhatt, F.D.M. Haldane, M. Hastings, A. Madhav, R. Moessner, S. Sachdev, T. Senthil, S.L. Sondhi, and A. Vishwanath for useful discussions. This work was supported by NSF Grants No. DMR-9809483 and No. DMR-9802468.
Funders:
Funding AgencyGrant Number
NSFDMR-9809483
NSFDMR-9802468
Record Number:CaltechAUTHORS:DAMprl00
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:DAMprl00
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.84.3434
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7099
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:09 Jan 2007
Last Modified:13 Dec 2016 00:56

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