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Article: A family of finite-temperature electronic phase transitions in graphene multilayers
Title | A family of finite-temperature electronic phase transitions in graphene multilayers |
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Authors | |
Issue Date | 2018 |
Publisher | American Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.org |
Citation | Science, 2018, v. 362 n. 6412, p. 324-328 How to Cite? |
Abstract | Suspended Bernal-stacked graphene multilayers up to an unexpectedly large thickness exhibit a broken-symmetry ground state whose origin remains to be understood. We show that a finite-temperature second-order phase transition occurs in multilayers whose critical temperature (Tc) increases from 12 kelvins (K) in bilayers to 100 K in heptalayers. A comparison of the data with a phenomenological model inspired by a mean-field approach suggests that the transition is associated with the appearance of a self-consistent valley- and spin-dependent staggered potential that changes sign from one layer to the next, appearing at Tc and increasing upon cooling. The systematic evolution with thickness of several measured quantities imposes constraints on any microscopic theory aiming to analyze the nature of electronic correlations in this system. |
Persistent Identifier | http://hdl.handle.net/10722/265118 |
ISSN | 2023 Impact Factor: 44.7 2023 SCImago Journal Rankings: 11.902 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Nam, Y | - |
dc.contributor.author | Ki, D | - |
dc.contributor.author | Soler-Delgado, D | - |
dc.contributor.author | Morpurgo, A | - |
dc.date.accessioned | 2018-11-20T02:00:32Z | - |
dc.date.available | 2018-11-20T02:00:32Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Science, 2018, v. 362 n. 6412, p. 324-328 | - |
dc.identifier.issn | 0036-8075 | - |
dc.identifier.uri | http://hdl.handle.net/10722/265118 | - |
dc.description.abstract | Suspended Bernal-stacked graphene multilayers up to an unexpectedly large thickness exhibit a broken-symmetry ground state whose origin remains to be understood. We show that a finite-temperature second-order phase transition occurs in multilayers whose critical temperature (Tc) increases from 12 kelvins (K) in bilayers to 100 K in heptalayers. A comparison of the data with a phenomenological model inspired by a mean-field approach suggests that the transition is associated with the appearance of a self-consistent valley- and spin-dependent staggered potential that changes sign from one layer to the next, appearing at Tc and increasing upon cooling. The systematic evolution with thickness of several measured quantities imposes constraints on any microscopic theory aiming to analyze the nature of electronic correlations in this system. | - |
dc.language | eng | - |
dc.publisher | American Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.org | - |
dc.relation.ispartof | Science | - |
dc.rights | Science. Copyright © American Association for the Advancement of Science. | - |
dc.rights | This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on v. 362(6412), 19 Oct 2018, DOI: 10.1126/science.aar6855 | - |
dc.title | A family of finite-temperature electronic phase transitions in graphene multilayers | - |
dc.type | Article | - |
dc.identifier.email | Ki, D: dkki@hku.hk | - |
dc.identifier.authority | Ki, D=rp02444 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1126/science.aar6855 | - |
dc.identifier.scopus | eid_2-s2.0-85055073479 | - |
dc.identifier.hkuros | 295864 | - |
dc.identifier.volume | 362 | - |
dc.identifier.issue | 6412 | - |
dc.identifier.spage | 324 | - |
dc.identifier.epage | 328 | - |
dc.identifier.isi | WOS:000447680100044 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0036-8075 | - |