Artificial heavy fermions in a van der Waals heterostructure
Heavy-fermion systems represent one of the paradigmatic strongly correlated states of matter 1 – 5 . They have been used as a platform for investigating exotic behaviour ranging from quantum criticality and non-Fermi liquid behaviour to unconventional topological superconductivity 4 – 12 . The heavy...
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| Veröffentlicht in: | Nature (London) 2021-11, Vol.599 (7886), p.582-586 |
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| creator | Vaňo, Viliam Amini, Mohammad Ganguli, Somesh C. Chen, Guangze Lado, Jose L. Kezilebieke, Shawulienu Liljeroth, Peter |
| description | Heavy-fermion systems represent one of the paradigmatic strongly correlated states of matter
1
–
5
. They have been used as a platform for investigating exotic behaviour ranging from quantum criticality and non-Fermi liquid behaviour to unconventional topological superconductivity
4
–
12
. The heavy-fermion phenomenon arises from the exchange interaction between localized magnetic moments and conduction electrons leading to Kondo lattice physics, and represents one of the long-standing open problems in quantum materials
3
. In a Kondo lattice, the exchange interaction gives rise to a band with heavy effective mass. This intriguing phenomenology has so far been realized only in compounds containing rare-earth elements with 4
f
or 5
f
electrons
1
,
4
,
13
,
14
. Here we realize a designer van der Waals heterostructure where artificial heavy fermions emerge from the Kondo coupling between a lattice of localized magnetic moments and itinerant electrons in a 1T/1H-TaS
2
heterostructure. We study the heterostructure using scanning tunnelling microscopy and spectroscopy and show that depending on the stacking order of the monolayers, we can reveal either the localized magnetic moments and the associated Kondo effect, or the conduction electrons with a heavy-fermion hybridization gap. Our experiments realize an ultimately tunable platform for future experiments probing enhanced many-body correlations, dimensional tuning of quantum criticality and unconventional superconductivity in two-dimensional artificial heavy-fermion systems
15
–
17
.
A study demonstrates the synthesis and characterization of a two-dimensional van der Waals heterostructure hosting artificial heavy fermions, providing a tunable platform for investigations of heavy-fermion physics. |
| doi_str_mv | 10.1038/s41586-021-04021-0 |
| format | Article |
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1
–
5
. They have been used as a platform for investigating exotic behaviour ranging from quantum criticality and non-Fermi liquid behaviour to unconventional topological superconductivity
4
–
12
. The heavy-fermion phenomenon arises from the exchange interaction between localized magnetic moments and conduction electrons leading to Kondo lattice physics, and represents one of the long-standing open problems in quantum materials
3
. In a Kondo lattice, the exchange interaction gives rise to a band with heavy effective mass. This intriguing phenomenology has so far been realized only in compounds containing rare-earth elements with 4
f
or 5
f
electrons
1
,
4
,
13
,
14
. Here we realize a designer van der Waals heterostructure where artificial heavy fermions emerge from the Kondo coupling between a lattice of localized magnetic moments and itinerant electrons in a 1T/1H-TaS
2
heterostructure. We study the heterostructure using scanning tunnelling microscopy and spectroscopy and show that depending on the stacking order of the monolayers, we can reveal either the localized magnetic moments and the associated Kondo effect, or the conduction electrons with a heavy-fermion hybridization gap. Our experiments realize an ultimately tunable platform for future experiments probing enhanced many-body correlations, dimensional tuning of quantum criticality and unconventional superconductivity in two-dimensional artificial heavy-fermion systems
15
–
17
.
A study demonstrates the synthesis and characterization of a two-dimensional van der Waals heterostructure hosting artificial heavy fermions, providing a tunable platform for investigations of heavy-fermion physics.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/s41586-021-04021-0</identifier><identifier>PMID: 34819682</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/766/119/544 ; 639/766/119/995 ; 639/766/119/997 ; 639/925/357/1018 ; Bias ; Conduction ; Conduction electrons ; Experiments ; Fermi liquids ; Fermions ; Heterostructures ; Humanities and Social Sciences ; Hybridization ; Kondo effect ; Magnetic fields ; Magnetic moments ; Microscopy ; Molecular beam epitaxy ; multidisciplinary ; Phenomenology ; Physics ; Properties ; Rare earth elements ; Scanning tunneling microscopy ; Science ; Science (multidisciplinary) ; Spectroscopy ; Spectrum analysis ; Unconventional superconductivity</subject><ispartof>Nature (London), 2021-11, Vol.599 (7886), p.582-586</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Limited 2021</rights><rights>2021. The Author(s), under exclusive licence to Springer Nature Limited.</rights><rights>COPYRIGHT 2021 Nature Publishing Group</rights><rights>Copyright Nature Publishing Group Nov 25, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c643t-9b71e6912949aca7a78152eeb0e8c2dca2f439d54eadf74801d50012f60ee7ad3</citedby><cites>FETCH-LOGICAL-c643t-9b71e6912949aca7a78152eeb0e8c2dca2f439d54eadf74801d50012f60ee7ad3</cites><orcidid>0000-0003-1050-3931 ; 0000-0003-4166-5079 ; 0000-0002-9916-1589 ; 0000-0003-1253-8097 ; 0000-0002-1956-2519</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41586-021-04021-0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/s41586-021-04021-0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/34819682$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Vaňo, Viliam</creatorcontrib><creatorcontrib>Amini, Mohammad</creatorcontrib><creatorcontrib>Ganguli, Somesh C.</creatorcontrib><creatorcontrib>Chen, Guangze</creatorcontrib><creatorcontrib>Lado, Jose L.</creatorcontrib><creatorcontrib>Kezilebieke, Shawulienu</creatorcontrib><creatorcontrib>Liljeroth, Peter</creatorcontrib><title>Artificial heavy fermions in a van der Waals heterostructure</title><title>Nature (London)</title><addtitle>Nature</addtitle><addtitle>Nature</addtitle><description>Heavy-fermion systems represent one of the paradigmatic strongly correlated states of matter
1
–
5
. They have been used as a platform for investigating exotic behaviour ranging from quantum criticality and non-Fermi liquid behaviour to unconventional topological superconductivity
4
–
12
. The heavy-fermion phenomenon arises from the exchange interaction between localized magnetic moments and conduction electrons leading to Kondo lattice physics, and represents one of the long-standing open problems in quantum materials
3
. In a Kondo lattice, the exchange interaction gives rise to a band with heavy effective mass. This intriguing phenomenology has so far been realized only in compounds containing rare-earth elements with 4
f
or 5
f
electrons
1
,
4
,
13
,
14
. Here we realize a designer van der Waals heterostructure where artificial heavy fermions emerge from the Kondo coupling between a lattice of localized magnetic moments and itinerant electrons in a 1T/1H-TaS
2
heterostructure. We study the heterostructure using scanning tunnelling microscopy and spectroscopy and show that depending on the stacking order of the monolayers, we can reveal either the localized magnetic moments and the associated Kondo effect, or the conduction electrons with a heavy-fermion hybridization gap. Our experiments realize an ultimately tunable platform for future experiments probing enhanced many-body correlations, dimensional tuning of quantum criticality and unconventional superconductivity in two-dimensional artificial heavy-fermion systems
15
–
17
.
A study demonstrates the synthesis and characterization of a two-dimensional van der Waals heterostructure hosting artificial heavy fermions, providing a tunable platform for investigations of heavy-fermion physics.</description><subject>639/766/119/544</subject><subject>639/766/119/995</subject><subject>639/766/119/997</subject><subject>639/925/357/1018</subject><subject>Bias</subject><subject>Conduction</subject><subject>Conduction electrons</subject><subject>Experiments</subject><subject>Fermi liquids</subject><subject>Fermions</subject><subject>Heterostructures</subject><subject>Humanities and Social Sciences</subject><subject>Hybridization</subject><subject>Kondo effect</subject><subject>Magnetic fields</subject><subject>Magnetic moments</subject><subject>Microscopy</subject><subject>Molecular beam epitaxy</subject><subject>multidisciplinary</subject><subject>Phenomenology</subject><subject>Physics</subject><subject>Properties</subject><subject>Rare earth 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1
–
5
. They have been used as a platform for investigating exotic behaviour ranging from quantum criticality and non-Fermi liquid behaviour to unconventional topological superconductivity
4
–
12
. The heavy-fermion phenomenon arises from the exchange interaction between localized magnetic moments and conduction electrons leading to Kondo lattice physics, and represents one of the long-standing open problems in quantum materials
3
. In a Kondo lattice, the exchange interaction gives rise to a band with heavy effective mass. This intriguing phenomenology has so far been realized only in compounds containing rare-earth elements with 4
f
or 5
f
electrons
1
,
4
,
13
,
14
. Here we realize a designer van der Waals heterostructure where artificial heavy fermions emerge from the Kondo coupling between a lattice of localized magnetic moments and itinerant electrons in a 1T/1H-TaS
2
heterostructure. We study the heterostructure using scanning tunnelling microscopy and spectroscopy and show that depending on the stacking order of the monolayers, we can reveal either the localized magnetic moments and the associated Kondo effect, or the conduction electrons with a heavy-fermion hybridization gap. Our experiments realize an ultimately tunable platform for future experiments probing enhanced many-body correlations, dimensional tuning of quantum criticality and unconventional superconductivity in two-dimensional artificial heavy-fermion systems
15
–
17
.
A study demonstrates the synthesis and characterization of a two-dimensional van der Waals heterostructure hosting artificial heavy fermions, providing a tunable platform for investigations of heavy-fermion physics.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>34819682</pmid><doi>10.1038/s41586-021-04021-0</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0003-1050-3931</orcidid><orcidid>https://orcid.org/0000-0003-4166-5079</orcidid><orcidid>https://orcid.org/0000-0002-9916-1589</orcidid><orcidid>https://orcid.org/0000-0003-1253-8097</orcidid><orcidid>https://orcid.org/0000-0002-1956-2519</orcidid></addata></record> |
| fulltext | fulltext |
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| source | Springer Nature - Complete Springer Journals; Nature |
| subjects | 639/766/119/544 639/766/119/995 639/766/119/997 639/925/357/1018 Bias Conduction Conduction electrons Experiments Fermi liquids Fermions Heterostructures Humanities and Social Sciences Hybridization Kondo effect Magnetic fields Magnetic moments Microscopy Molecular beam epitaxy multidisciplinary Phenomenology Physics Properties Rare earth elements Scanning tunneling microscopy Science Science (multidisciplinary) Spectroscopy Spectrum analysis Unconventional superconductivity |
| title | Artificial heavy fermions in a van der Waals heterostructure |
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