Observation of topological surface state in a superconducting material

Gyanendra Dhakal; Md Mofazzel Hosen; Ayana Ghosh; Christopher Lane; Karolina Gornicka; Michał Winiarski; Klauss Dimitri; Firoza Kabir; Christopher Sims; Sabin Regmi; William Neff; Luis Persaud; Yangyang Liu; Dariusz Kaczorowski; Jian-Xin Zhu; Tomasz Klimczuk; Madhab Neupane

Observation of topological surface state in a superconducting material

Gyanendra Dhakal, Md Mofazzel Hosen, Ayana Ghosh, Christopher Lane, Karolina Gornicka, Michał Winiarski, Klauss Dimitri, Firoza Kabir, Christopher Sims, Sabin Regmi, William Neff, Luis Persaud, Yangyang Liu, Dariusz Kaczorowski, Jian-Xin Zhu, Tomasz Klimczuk, Madhab Neupane

Research output: Book/Report › Book › peer-review

Abstract

The discovery of topological insulator phase has ignited massive research interests in novel quantum materials. Topological insulators with superconductivity further invigorate the importance of materials providing the platform to study the interplay between these two unique states. However, the candidates of such materials are rare. Here, we report a systematic angle-resolved photoemission spectroscopy (ARPES) study of a superconducting material CaBi2 [Tc = 2 K], corroborated by the first principles calculations. Our study reveals the presence of Dirac cones with a topological protection in this system. Systematic topological analysis based on symmetry indicator shows the presence of weak topological indices in this material. Furthermore, our transport measurements show the presence of large magnetoresistance in this compound. Our results indicate that CaBi2 could potentially provide a material platform to study the interplay between superconductivity and topology.

Original language	English
State	Published - Nov 19 2019
Externally published	Yes

Access to Document

https://www.researchgate.net/publication/337413042_Observation_of_topological_surface_state_in_a_superconducting_material

Cite this

Dhakal, G., Hosen, M. M., Ghosh, A., Lane, C., Gornicka, K., Winiarski, M., Dimitri, K., Kabir, F., Sims, C., Regmi, S., Neff, W., Persaud, L., Liu, Y., Kaczorowski, D., Zhu, J.-X., Klimczuk, T., & Neupane, M. (2019). Observation of topological surface state in a superconducting material. https://www.researchgate.net/publication/337413042_Observation_of_topological_surface_state_in_a_superconducting_material

@book{87d29688d3344b4a88fbb8c72c4dc54a,

title = "Observation of topological surface state in a superconducting material",

abstract = "The discovery of topological insulator phase has ignited massive research interests in novel quantum materials. Topological insulators with superconductivity further invigorate the importance of materials providing the platform to study the interplay between these two unique states. However, the candidates of such materials are rare. Here, we report a systematic angle-resolved photoemission spectroscopy (ARPES) study of a superconducting material CaBi2 [Tc = 2 K], corroborated by the first principles calculations. Our study reveals the presence of Dirac cones with a topological protection in this system. Systematic topological analysis based on symmetry indicator shows the presence of weak topological indices in this material. Furthermore, our transport measurements show the presence of large magnetoresistance in this compound. Our results indicate that CaBi2 could potentially provide a material platform to study the interplay between superconductivity and topology.",

author = "Gyanendra Dhakal and Hosen, {Md Mofazzel} and Ayana Ghosh and Christopher Lane and Karolina Gornicka and Micha{\l} Winiarski and Klauss Dimitri and Firoza Kabir and Christopher Sims and Sabin Regmi and William Neff and Luis Persaud and Yangyang Liu and Dariusz Kaczorowski and Jian-Xin Zhu and Tomasz Klimczuk and Madhab Neupane",

year = "2019",

month = nov,

day = "19",

language = "English",

}

Dhakal, G, Hosen, MM, Ghosh, A, Lane, C, Gornicka, K, Winiarski, M, Dimitri, K, Kabir, F, Sims, C, Regmi, S, Neff, W, Persaud, L, Liu, Y, Kaczorowski, D, Zhu, J-X, Klimczuk, T & Neupane, M 2019, Observation of topological surface state in a superconducting material. <https://www.researchgate.net/publication/337413042_Observation_of_topological_surface_state_in_a_superconducting_material>

TY - BOOK

T1 - Observation of topological surface state in a superconducting material

AU - Dhakal, Gyanendra

AU - Hosen, Md Mofazzel

AU - Ghosh, Ayana

AU - Lane, Christopher

AU - Gornicka, Karolina

AU - Winiarski, Michał

AU - Dimitri, Klauss

AU - Kabir, Firoza

AU - Sims, Christopher

AU - Regmi, Sabin

AU - Neff, William

AU - Persaud, Luis

AU - Liu, Yangyang

AU - Kaczorowski, Dariusz

AU - Zhu, Jian-Xin

AU - Klimczuk, Tomasz

AU - Neupane, Madhab

PY - 2019/11/19

Y1 - 2019/11/19

N2 - The discovery of topological insulator phase has ignited massive research interests in novel quantum materials. Topological insulators with superconductivity further invigorate the importance of materials providing the platform to study the interplay between these two unique states. However, the candidates of such materials are rare. Here, we report a systematic angle-resolved photoemission spectroscopy (ARPES) study of a superconducting material CaBi2 [Tc = 2 K], corroborated by the first principles calculations. Our study reveals the presence of Dirac cones with a topological protection in this system. Systematic topological analysis based on symmetry indicator shows the presence of weak topological indices in this material. Furthermore, our transport measurements show the presence of large magnetoresistance in this compound. Our results indicate that CaBi2 could potentially provide a material platform to study the interplay between superconductivity and topology.

AB - The discovery of topological insulator phase has ignited massive research interests in novel quantum materials. Topological insulators with superconductivity further invigorate the importance of materials providing the platform to study the interplay between these two unique states. However, the candidates of such materials are rare. Here, we report a systematic angle-resolved photoemission spectroscopy (ARPES) study of a superconducting material CaBi2 [Tc = 2 K], corroborated by the first principles calculations. Our study reveals the presence of Dirac cones with a topological protection in this system. Systematic topological analysis based on symmetry indicator shows the presence of weak topological indices in this material. Furthermore, our transport measurements show the presence of large magnetoresistance in this compound. Our results indicate that CaBi2 could potentially provide a material platform to study the interplay between superconductivity and topology.

M3 - Book

BT - Observation of topological surface state in a superconducting material

ER -

Observation of topological surface state in a superconducting material

Abstract

Access to Document

Fingerprint

Cite this