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Theory of collective magnetophonon resonance and melting of a field-induced Wigner solid
Stanford Univ, Dept Phys, Stanford, CA 94305 USA..
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Univ Paris Saclay, Ctr Theoret Phys, Ecole Polytech, CNRS UMR 7644, F-91128 Palaiseau, France.;Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden..
Stanford Univ, Dept Phys, Stanford, CA 94305 USA.;SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA..
Princeton Univ Sch Nat Sci, Inst Adv Study, 1 Einstein Dr, Princeton, NJ 08540 USA.;Chalmers Univ Technol, Dept Phys, Div Theoret Phys, SE-41296 Gothenburg, Sweden..ORCID iD: 0000-0002-8815-5079
2019 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 100, no 8, article id 085140Article in journal (Refereed) Published
Abstract [en]

Electron solid phases of matter are revealed by characteristic vibrational resonances. Sufficiently large magnetic fields can overcome the effects of disorder, leading to a weakly pinned collective mode called the magnetophonon. Consequently, in this regime it is possible to develop a tightly constrained hydrodynamic theory of pinned magnetophonons. The behavior of the magnetophonon resonance across thermal and quantum melting transitions has been experimentally characterized in two-dimensional electron systems. Applying our theory to these transitions we explain several key features of the data. Firstly, violation of the Fukuyama-Lee sum rule as the transition is approached is shown to be a consequence of the non-Lorentzian form taken by the resonance. Secondly, this non-Lorentzian shape is shown to be caused by dissipative channels that become especially important close to melting: proliferating dislocations and uncondensed charge carriers.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 8, article id 085140
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-259441DOI: 10.1103/PhysRevB.100.085140ISI: 000482582200007Scopus ID: 2-s2.0-85072563765OAI: oai:DiVA.org:kth-259441DiVA, id: diva2:1353550
Note

QC 20190923

Available from: 2019-09-23 Created: 2019-09-23 Last updated: 2019-10-04Bibliographically approved

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