Electronic structures and Mott state of epitaxial TaS2 monolayers
Layered material TaS 2 hosts multiple structural phases and exotic correlated quantum states, including charge density wave (CDW), superconductivity, quantum spin liquid, and Mott insulating state. Here, we synthesized TaS 2 monolayers in H and T phases using the molecular beam epitaxial (MBE) metho...
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| creator | Tian, Qichao Ding, Chi Qiu, Xiaodong Meng, Qinghao Wang, Kaili Yu, Fan Mu, Yuyang Wang, Can Sun, Jian Zhang, Yi |
| description | Layered material TaS
2
hosts multiple structural phases and exotic correlated quantum states, including charge density wave (CDW), superconductivity, quantum spin liquid, and Mott insulating state. Here, we synthesized TaS
2
monolayers in H and T phases using the molecular beam epitaxial (MBE) method and studied their electronic structures via angle-resolved photo-emission spectroscopy (ARPES). We found that the H phase TaS
2
(H-TaS
2
) monolayer is metallic, with an energy band crossing the Fermi level. In contrast, the T phase TaS
2
(T-TaS
2
) monolayer shows an insulated energy gap at the Fermi level, while the normal calculated band structure implies it should be metallic without any band gap. However, by considering Hubbard interaction potential
U
, further density functional theory (DFT) calculation suggests that monolayer T-TaS
2
could be a CDW Mott insulator, and the DFT+
U
calculation matches well with the ARPES result. More significantly, the temperature-dependent ARPES result indicates that the CDW Mott state in the T-TaS
2
monolayer is more robust than its bulk counterpart and can persist at room temperature. Our results reveal that the dimensional effect can enhance the CDW Mott state and provide valuable insights for further exploring the exotic properties of monolayer TaS
2
. |
| doi_str_mv | 10.1007/s11433-023-2328-1 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_3039357853</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>3038982791</sourcerecordid><originalsourceid>FETCH-LOGICAL-c296t-89977e50ffbcabb8ed2f2892c578b7c4cb5b653932f1fdb8bf35beb142f40fab3</originalsourceid><addsrcrecordid>eNqFkE1LAzEQhoMoWGp_gLeA52i-dpMcS6kfoHiwnkOSJrJlu6lJFuy_N2UFT-JcZhje9x3mAeCa4FuCsbjLhHDGEKYMUUYlImdgRmSrEFFUnNe5FRwJxuUlWOS8w7WYwlzwGViue-9KikPnYC5pdGVMPkMzbOFLLKXuTPEwBugPXTFfnenhxrxRuI9D7M3Rp3wFLoLps1_89Dl4v19vVo_o-fXhabV8Ro6qtiCplBC-wSFYZ6yVfksDlYq6RkgrHHe2sW3DFKOBhK2VNrDGeks4DRwHY9kc3Ey5hxQ_R5-L3sUxDfWkZvUdVnMa9o9KKkmFIlVFJpVLMefkgz6kbm_SUROsT0j1hFRXpPqEVJ88dPLkqh0-fPpN_tv0DTxDeEQ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>3038982791</pqid></control><display><type>article</type><title>Electronic structures and Mott state of epitaxial TaS2 monolayers</title><source>SpringerNature Journals</source><source>Alma/SFX Local Collection</source><creator>Tian, Qichao ; Ding, Chi ; Qiu, Xiaodong ; Meng, Qinghao ; Wang, Kaili ; Yu, Fan ; Mu, Yuyang ; Wang, Can ; Sun, Jian ; Zhang, Yi</creator><creatorcontrib>Tian, Qichao ; Ding, Chi ; Qiu, Xiaodong ; Meng, Qinghao ; Wang, Kaili ; Yu, Fan ; Mu, Yuyang ; Wang, Can ; Sun, Jian ; Zhang, Yi</creatorcontrib><description>Layered material TaS
2
hosts multiple structural phases and exotic correlated quantum states, including charge density wave (CDW), superconductivity, quantum spin liquid, and Mott insulating state. Here, we synthesized TaS
2
monolayers in H and T phases using the molecular beam epitaxial (MBE) method and studied their electronic structures via angle-resolved photo-emission spectroscopy (ARPES). We found that the H phase TaS
2
(H-TaS
2
) monolayer is metallic, with an energy band crossing the Fermi level. In contrast, the T phase TaS
2
(T-TaS
2
) monolayer shows an insulated energy gap at the Fermi level, while the normal calculated band structure implies it should be metallic without any band gap. However, by considering Hubbard interaction potential
U
, further density functional theory (DFT) calculation suggests that monolayer T-TaS
2
could be a CDW Mott insulator, and the DFT+
U
calculation matches well with the ARPES result. More significantly, the temperature-dependent ARPES result indicates that the CDW Mott state in the T-TaS
2
monolayer is more robust than its bulk counterpart and can persist at room temperature. Our results reveal that the dimensional effect can enhance the CDW Mott state and provide valuable insights for further exploring the exotic properties of monolayer TaS
2
.</description><identifier>ISSN: 1674-7348</identifier><identifier>EISSN: 1869-1927</identifier><identifier>DOI: 10.1007/s11433-023-2328-1</identifier><language>eng</language><publisher>Beijing: Science China Press</publisher><subject>Astronomy ; Charge density waves ; Classical and Continuum Physics ; Density functional theory ; Electrons ; Emission analysis ; Emission spectroscopy ; Energy ; Energy bands ; Energy gap ; Fermi level ; Graphene ; Mathematical analysis ; Molecular beam epitaxy ; Molecular beams ; Monolayers ; Observations and Techniques ; Physics ; Physics and Astronomy ; Room temperature ; Spectrum analysis ; Spin liquid ; Superconductivity ; Temperature dependence</subject><ispartof>Science China. Physics, mechanics & astronomy, 2024-05, Vol.67 (5), p.256811, Article 256811</ispartof><rights>Science China Press 2024</rights><rights>Science China Press 2024.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c296t-89977e50ffbcabb8ed2f2892c578b7c4cb5b653932f1fdb8bf35beb142f40fab3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11433-023-2328-1$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11433-023-2328-1$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,782,786,27931,27932,41495,42564,51326</link.rule.ids></links><search><creatorcontrib>Tian, Qichao</creatorcontrib><creatorcontrib>Ding, Chi</creatorcontrib><creatorcontrib>Qiu, Xiaodong</creatorcontrib><creatorcontrib>Meng, Qinghao</creatorcontrib><creatorcontrib>Wang, Kaili</creatorcontrib><creatorcontrib>Yu, Fan</creatorcontrib><creatorcontrib>Mu, Yuyang</creatorcontrib><creatorcontrib>Wang, Can</creatorcontrib><creatorcontrib>Sun, Jian</creatorcontrib><creatorcontrib>Zhang, Yi</creatorcontrib><title>Electronic structures and Mott state of epitaxial TaS2 monolayers</title><title>Science China. Physics, mechanics & astronomy</title><addtitle>Sci. China Phys. Mech. Astron</addtitle><description>Layered material TaS
2
hosts multiple structural phases and exotic correlated quantum states, including charge density wave (CDW), superconductivity, quantum spin liquid, and Mott insulating state. Here, we synthesized TaS
2
monolayers in H and T phases using the molecular beam epitaxial (MBE) method and studied their electronic structures via angle-resolved photo-emission spectroscopy (ARPES). We found that the H phase TaS
2
(H-TaS
2
) monolayer is metallic, with an energy band crossing the Fermi level. In contrast, the T phase TaS
2
(T-TaS
2
) monolayer shows an insulated energy gap at the Fermi level, while the normal calculated band structure implies it should be metallic without any band gap. However, by considering Hubbard interaction potential
U
, further density functional theory (DFT) calculation suggests that monolayer T-TaS
2
could be a CDW Mott insulator, and the DFT+
U
calculation matches well with the ARPES result. More significantly, the temperature-dependent ARPES result indicates that the CDW Mott state in the T-TaS
2
monolayer is more robust than its bulk counterpart and can persist at room temperature. Our results reveal that the dimensional effect can enhance the CDW Mott state and provide valuable insights for further exploring the exotic properties of monolayer TaS
2
.</description><subject>Astronomy</subject><subject>Charge density waves</subject><subject>Classical and Continuum Physics</subject><subject>Density functional theory</subject><subject>Electrons</subject><subject>Emission analysis</subject><subject>Emission spectroscopy</subject><subject>Energy</subject><subject>Energy bands</subject><subject>Energy gap</subject><subject>Fermi level</subject><subject>Graphene</subject><subject>Mathematical analysis</subject><subject>Molecular beam epitaxy</subject><subject>Molecular beams</subject><subject>Monolayers</subject><subject>Observations and Techniques</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Room temperature</subject><subject>Spectrum analysis</subject><subject>Spin liquid</subject><subject>Superconductivity</subject><subject>Temperature dependence</subject><issn>1674-7348</issn><issn>1869-1927</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhoMoWGp_gLeA52i-dpMcS6kfoHiwnkOSJrJlu6lJFuy_N2UFT-JcZhje9x3mAeCa4FuCsbjLhHDGEKYMUUYlImdgRmSrEFFUnNe5FRwJxuUlWOS8w7WYwlzwGViue-9KikPnYC5pdGVMPkMzbOFLLKXuTPEwBugPXTFfnenhxrxRuI9D7M3Rp3wFLoLps1_89Dl4v19vVo_o-fXhabV8Ro6qtiCplBC-wSFYZ6yVfksDlYq6RkgrHHe2sW3DFKOBhK2VNrDGeks4DRwHY9kc3Ey5hxQ_R5-L3sUxDfWkZvUdVnMa9o9KKkmFIlVFJpVLMefkgz6kbm_SUROsT0j1hFRXpPqEVJ88dPLkqh0-fPpN_tv0DTxDeEQ</recordid><startdate>20240501</startdate><enddate>20240501</enddate><creator>Tian, Qichao</creator><creator>Ding, Chi</creator><creator>Qiu, Xiaodong</creator><creator>Meng, Qinghao</creator><creator>Wang, Kaili</creator><creator>Yu, Fan</creator><creator>Mu, Yuyang</creator><creator>Wang, Can</creator><creator>Sun, Jian</creator><creator>Zhang, Yi</creator><general>Science China Press</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20240501</creationdate><title>Electronic structures and Mott state of epitaxial TaS2 monolayers</title><author>Tian, Qichao ; Ding, Chi ; Qiu, Xiaodong ; Meng, Qinghao ; Wang, Kaili ; Yu, Fan ; Mu, Yuyang ; Wang, Can ; Sun, Jian ; Zhang, Yi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c296t-89977e50ffbcabb8ed2f2892c578b7c4cb5b653932f1fdb8bf35beb142f40fab3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Astronomy</topic><topic>Charge density waves</topic><topic>Classical and Continuum Physics</topic><topic>Density functional theory</topic><topic>Electrons</topic><topic>Emission analysis</topic><topic>Emission spectroscopy</topic><topic>Energy</topic><topic>Energy bands</topic><topic>Energy gap</topic><topic>Fermi level</topic><topic>Graphene</topic><topic>Mathematical analysis</topic><topic>Molecular beam epitaxy</topic><topic>Molecular beams</topic><topic>Monolayers</topic><topic>Observations and Techniques</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Room temperature</topic><topic>Spectrum analysis</topic><topic>Spin liquid</topic><topic>Superconductivity</topic><topic>Temperature dependence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tian, Qichao</creatorcontrib><creatorcontrib>Ding, Chi</creatorcontrib><creatorcontrib>Qiu, Xiaodong</creatorcontrib><creatorcontrib>Meng, Qinghao</creatorcontrib><creatorcontrib>Wang, Kaili</creatorcontrib><creatorcontrib>Yu, Fan</creatorcontrib><creatorcontrib>Mu, Yuyang</creatorcontrib><creatorcontrib>Wang, Can</creatorcontrib><creatorcontrib>Sun, Jian</creatorcontrib><creatorcontrib>Zhang, Yi</creatorcontrib><collection>CrossRef</collection><jtitle>Science China. Physics, mechanics & astronomy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tian, Qichao</au><au>Ding, Chi</au><au>Qiu, Xiaodong</au><au>Meng, Qinghao</au><au>Wang, Kaili</au><au>Yu, Fan</au><au>Mu, Yuyang</au><au>Wang, Can</au><au>Sun, Jian</au><au>Zhang, Yi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electronic structures and Mott state of epitaxial TaS2 monolayers</atitle><jtitle>Science China. Physics, mechanics & astronomy</jtitle><stitle>Sci. China Phys. Mech. Astron</stitle><date>2024-05-01</date><risdate>2024</risdate><volume>67</volume><issue>5</issue><spage>256811</spage><pages>256811-</pages><artnum>256811</artnum><issn>1674-7348</issn><eissn>1869-1927</eissn><abstract>Layered material TaS
2
hosts multiple structural phases and exotic correlated quantum states, including charge density wave (CDW), superconductivity, quantum spin liquid, and Mott insulating state. Here, we synthesized TaS
2
monolayers in H and T phases using the molecular beam epitaxial (MBE) method and studied their electronic structures via angle-resolved photo-emission spectroscopy (ARPES). We found that the H phase TaS
2
(H-TaS
2
) monolayer is metallic, with an energy band crossing the Fermi level. In contrast, the T phase TaS
2
(T-TaS
2
) monolayer shows an insulated energy gap at the Fermi level, while the normal calculated band structure implies it should be metallic without any band gap. However, by considering Hubbard interaction potential
U
, further density functional theory (DFT) calculation suggests that monolayer T-TaS
2
could be a CDW Mott insulator, and the DFT+
U
calculation matches well with the ARPES result. More significantly, the temperature-dependent ARPES result indicates that the CDW Mott state in the T-TaS
2
monolayer is more robust than its bulk counterpart and can persist at room temperature. Our results reveal that the dimensional effect can enhance the CDW Mott state and provide valuable insights for further exploring the exotic properties of monolayer TaS
2
.</abstract><cop>Beijing</cop><pub>Science China Press</pub><doi>10.1007/s11433-023-2328-1</doi></addata></record> |
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| subjects | Astronomy Charge density waves Classical and Continuum Physics Density functional theory Electrons Emission analysis Emission spectroscopy Energy Energy bands Energy gap Fermi level Graphene Mathematical analysis Molecular beam epitaxy Molecular beams Monolayers Observations and Techniques Physics Physics and Astronomy Room temperature Spectrum analysis Spin liquid Superconductivity Temperature dependence |
| title | Electronic structures and Mott state of epitaxial TaS2 monolayers |
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