Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2
Symmetry-broken three-dimensional (3D) topological Dirac semimetal systems with strong spin-orbit coupling can host many exotic Hall-like phenomena and Weyl fermion quantum transport. Here, using high-resolution angle-resolved photoemission spectroscopy, we performed systematic electronic structure...
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| Veröffentlicht in: | Nature communications 2014-05, Vol.5 (1), p.3786-3786, Article 3786 |
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| creator | Neupane, Madhab Xu, Su-Yang Sankar, Raman Alidoust, Nasser Bian, Guang Liu, Chang Belopolski, Ilya Chang, Tay-Rong Jeng, Horng-Tay Lin, Hsin Bansil, Arun Chou, Fangcheng Hasan, M. Zahid |
| description | Symmetry-broken three-dimensional (3D) topological Dirac semimetal systems with strong spin-orbit coupling can host many exotic Hall-like phenomena and Weyl fermion quantum transport. Here, using high-resolution angle-resolved photoemission spectroscopy, we performed systematic electronic structure studies on Cd
3
As
2
, which has been predicted to be the parent material, from which many unusual topological phases can be derived. We observe a highly linear bulk band crossing to form a 3D dispersive Dirac cone projected at the Brillouin zone centre by studying the (001)-cleaved surface. Remarkably, an unusually high in-plane Fermi velocity up to 1.5 × 10
6
ms
−1
is observed in our samples, where the mobility is known up to 40,000 cm
2
V
−1
s
−1
, suggesting that Cd
3
As
2
can be a promising candidate as an anisotropic-hypercone (three-dimensional) high spin-orbit analogue of 3D graphene. Our discovery of the Dirac-like bulk topological semimetal phase in Cd
3
As
2
opens the door for exploring higher dimensional spin-orbit Dirac physics in a real material.
Topological Dirac semimetals constitute a promising platform for the study of quantum Hall phenomena and Weyl fermion transport. Using high-resolution angle-resolved photoemission spectroscopy, Neupane
et al.
identify the topological bulk Dirac semimetal phase in a Cd
3
As
2
system. |
| doi_str_mv | 10.1038/ncomms4786 |
| format | Article |
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3
As
2
, which has been predicted to be the parent material, from which many unusual topological phases can be derived. We observe a highly linear bulk band crossing to form a 3D dispersive Dirac cone projected at the Brillouin zone centre by studying the (001)-cleaved surface. Remarkably, an unusually high in-plane Fermi velocity up to 1.5 × 10
6
ms
−1
is observed in our samples, where the mobility is known up to 40,000 cm
2
V
−1
s
−1
, suggesting that Cd
3
As
2
can be a promising candidate as an anisotropic-hypercone (three-dimensional) high spin-orbit analogue of 3D graphene. Our discovery of the Dirac-like bulk topological semimetal phase in Cd
3
As
2
opens the door for exploring higher dimensional spin-orbit Dirac physics in a real material.
Topological Dirac semimetals constitute a promising platform for the study of quantum Hall phenomena and Weyl fermion transport. Using high-resolution angle-resolved photoemission spectroscopy, Neupane
et al.
identify the topological bulk Dirac semimetal phase in a Cd
3
As
2
system.</description><identifier>ISSN: 2041-1723</identifier><identifier>EISSN: 2041-1723</identifier><identifier>DOI: 10.1038/ncomms4786</identifier><identifier>PMID: 24807399</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/301 ; 639/766/119 ; 639/766/483 ; Humanities and Social Sciences ; multidisciplinary ; Science ; Science (multidisciplinary)</subject><ispartof>Nature communications, 2014-05, Vol.5 (1), p.3786-3786, Article 3786</ispartof><rights>Springer Nature Limited 2014</rights><rights>Copyright Nature Publishing Group May 2014</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383t-64f30de4df91478e7bb9fff89118cd0fe5854b172a0044ce5dd6318626e2dd7c3</citedby><cites>FETCH-LOGICAL-c383t-64f30de4df91478e7bb9fff89118cd0fe5854b172a0044ce5dd6318626e2dd7c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/ncomms4786$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://doi.org/10.1038/ncomms4786$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,781,785,27926,27927,41122,42191,51578</link.rule.ids><linktorsrc>$$Uhttps://doi.org/10.1038/ncomms4786$$EView_record_in_Springer_Nature$$FView_record_in_$$GSpringer_Nature</linktorsrc><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24807399$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Neupane, Madhab</creatorcontrib><creatorcontrib>Xu, Su-Yang</creatorcontrib><creatorcontrib>Sankar, Raman</creatorcontrib><creatorcontrib>Alidoust, Nasser</creatorcontrib><creatorcontrib>Bian, Guang</creatorcontrib><creatorcontrib>Liu, Chang</creatorcontrib><creatorcontrib>Belopolski, Ilya</creatorcontrib><creatorcontrib>Chang, Tay-Rong</creatorcontrib><creatorcontrib>Jeng, Horng-Tay</creatorcontrib><creatorcontrib>Lin, Hsin</creatorcontrib><creatorcontrib>Bansil, Arun</creatorcontrib><creatorcontrib>Chou, Fangcheng</creatorcontrib><creatorcontrib>Hasan, M. Zahid</creatorcontrib><title>Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2</title><title>Nature communications</title><addtitle>Nat Commun</addtitle><addtitle>Nat Commun</addtitle><description>Symmetry-broken three-dimensional (3D) topological Dirac semimetal systems with strong spin-orbit coupling can host many exotic Hall-like phenomena and Weyl fermion quantum transport. Here, using high-resolution angle-resolved photoemission spectroscopy, we performed systematic electronic structure studies on Cd
3
As
2
, which has been predicted to be the parent material, from which many unusual topological phases can be derived. We observe a highly linear bulk band crossing to form a 3D dispersive Dirac cone projected at the Brillouin zone centre by studying the (001)-cleaved surface. Remarkably, an unusually high in-plane Fermi velocity up to 1.5 × 10
6
ms
−1
is observed in our samples, where the mobility is known up to 40,000 cm
2
V
−1
s
−1
, suggesting that Cd
3
As
2
can be a promising candidate as an anisotropic-hypercone (three-dimensional) high spin-orbit analogue of 3D graphene. Our discovery of the Dirac-like bulk topological semimetal phase in Cd
3
As
2
opens the door for exploring higher dimensional spin-orbit Dirac physics in a real material.
Topological Dirac semimetals constitute a promising platform for the study of quantum Hall phenomena and Weyl fermion transport. Using high-resolution angle-resolved photoemission spectroscopy, Neupane
et al.
identify the topological bulk Dirac semimetal phase in a Cd
3
As
2
system.</description><subject>639/301</subject><subject>639/766/119</subject><subject>639/766/483</subject><subject>Humanities and Social Sciences</subject><subject>multidisciplinary</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><issn>2041-1723</issn><issn>2041-1723</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNplkF9LwzAUxYMobsy9-AGk4Iso1aTJ2vRxzL8w2Iu-CSVNbtaMtplJK-zbG93Uoffl3uT-OJdzEDol-Jpgym9aaZvGs4ynB2iYYEZikiX0cG8eoLH3KxyK5oQzdowGCeM4o3k-RK-L0oN7F52xbWR1JKKucgCxMg20PnyKOurs2tZ2aWSYb40TMvLQhH0X3utKeIhMG1VmWcWNLU1tuk00U3TqkxN0pEXtYbzrI_Ryf_c8e4zni4en2XQeS8ppF6dMU6yAKZ2TYASyssy11jwnhEuFNUz4hJXBisCYMQkTpVJKeJqkkCiVSTpCF1vdtbNvPfiuaIyXUNeiBdv7gkwSykIcGQ7o-R90ZXsXXH5RJE3zLCGButxS0lnvHehi7Uwj3KYguPiMvfiNPcBnO8m-bED9oN8hB-BqC_iwapfg9m7-l_sAhHGMow</recordid><startdate>20140507</startdate><enddate>20140507</enddate><creator>Neupane, Madhab</creator><creator>Xu, Su-Yang</creator><creator>Sankar, Raman</creator><creator>Alidoust, Nasser</creator><creator>Bian, Guang</creator><creator>Liu, Chang</creator><creator>Belopolski, Ilya</creator><creator>Chang, Tay-Rong</creator><creator>Jeng, Horng-Tay</creator><creator>Lin, Hsin</creator><creator>Bansil, Arun</creator><creator>Chou, Fangcheng</creator><creator>Hasan, M. 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Zahid</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2</atitle><jtitle>Nature communications</jtitle><stitle>Nat Commun</stitle><addtitle>Nat Commun</addtitle><date>2014-05-07</date><risdate>2014</risdate><volume>5</volume><issue>1</issue><spage>3786</spage><epage>3786</epage><pages>3786-3786</pages><artnum>3786</artnum><issn>2041-1723</issn><eissn>2041-1723</eissn><abstract>Symmetry-broken three-dimensional (3D) topological Dirac semimetal systems with strong spin-orbit coupling can host many exotic Hall-like phenomena and Weyl fermion quantum transport. Here, using high-resolution angle-resolved photoemission spectroscopy, we performed systematic electronic structure studies on Cd
3
As
2
, which has been predicted to be the parent material, from which many unusual topological phases can be derived. We observe a highly linear bulk band crossing to form a 3D dispersive Dirac cone projected at the Brillouin zone centre by studying the (001)-cleaved surface. Remarkably, an unusually high in-plane Fermi velocity up to 1.5 × 10
6
ms
−1
is observed in our samples, where the mobility is known up to 40,000 cm
2
V
−1
s
−1
, suggesting that Cd
3
As
2
can be a promising candidate as an anisotropic-hypercone (three-dimensional) high spin-orbit analogue of 3D graphene. Our discovery of the Dirac-like bulk topological semimetal phase in Cd
3
As
2
opens the door for exploring higher dimensional spin-orbit Dirac physics in a real material.
Topological Dirac semimetals constitute a promising platform for the study of quantum Hall phenomena and Weyl fermion transport. Using high-resolution angle-resolved photoemission spectroscopy, Neupane
et al.
identify the topological bulk Dirac semimetal phase in a Cd
3
As
2
system.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>24807399</pmid><doi>10.1038/ncomms4786</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| title | Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2 |
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