Importance of Specific Heat Characterization when Reporting New Superconductors: An Example of Superconductivity in LiGa                         2                         Rh

Elizabeth M. Carnicom; Weiwei Xie; Zoe Yang; Karolina Górnicka; Tai Kong; Tomasz Klimczuk; Robert J. Cava

doi:10.1021/acs.chemmater.9b00258

Importance of Specific Heat Characterization when Reporting New Superconductors: An Example of Superconductivity in LiGa ₂ Rh

Elizabeth M. Carnicom
, Weiwei Xie
, Zoe Yang
, Karolina Górnicka
, Tai Kong
, Tomasz Klimczuk
, Robert J. Cava

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We show that the full-Heusler compound LiGa ₂ Rh is a superconductor with T _c = 2.4 K. The new superconductor was found as a result of an intuition-based extension of a database search for superconductors that looked for the presence of peaks in the electronic band structure near the Fermi energy. The measurement of the entropy loss during the transition from the nonsuperconducting to the superconducting state, a straightforward measurement rarely presented in reports of "new" superconducting materials, played a critical role in identifying and isolating the superconducting compound. This study presents a particularly good example of how specific heat measurements are important for the identification and isolation of a new superconductor, since much more frequently reported resistive and magnetic susceptibility characterizations are often not enough to confirm the identification of a new superconducting material.

Original language	English
Pages (from-to)	2164-2173
Number of pages	10
Journal	Chemistry of Materials
Volume	31
Issue number	6
DOIs	https://doi.org/10.1021/acs.chemmater.9b00258
State	Published - Mar 26 2019
Externally published	Yes

Funding

The materials synthesis was supported by the Department of Energy, Division of Basic Energy Sciences, Grant DE-FG02- 98ER45706, and the property characterization was supported by the Gordon and Betty Moore Foundation EPiQS initiative, Grant GBMF-4412. The work at LSU was supported by the Beckman Young Investigator (BYI) program. The research in Poland was supported by the National Science Centre, Grant UMO-2016/22/M/ST5/00435. The crystal structure CIF for LiGa2Rh was deposited in the Cambridge Crystallographic Data Centre (#1898138). The research in Poland was supported by the National Science Centre Grant UMO-2016/22/M/ST5/00435. The crystal structure CIF for LiGa2Rh was deposited in the Cambridge Crystallographic Data Centre (#1898138).

Access to Document

10.1021/acs.chemmater.9b00258

Cite this

@article{c95fd23f103948e6884b1757643f3360,

title = "Importance of Specific Heat Characterization when Reporting New Superconductors: An Example of Superconductivity in LiGa 2 Rh",

abstract = " We show that the full-Heusler compound LiGa 2 Rh is a superconductor with T c = 2.4 K. The new superconductor was found as a result of an intuition-based extension of a database search for superconductors that looked for the presence of peaks in the electronic band structure near the Fermi energy. The measurement of the entropy loss during the transition from the nonsuperconducting to the superconducting state, a straightforward measurement rarely presented in reports of {"}new{"} superconducting materials, played a critical role in identifying and isolating the superconducting compound. This study presents a particularly good example of how specific heat measurements are important for the identification and isolation of a new superconductor, since much more frequently reported resistive and magnetic susceptibility characterizations are often not enough to confirm the identification of a new superconducting material.",

author = "Carnicom, \{Elizabeth M.\} and Weiwei Xie and Zoe Yang and Karolina G{\'o}rnicka and Tai Kong and Tomasz Klimczuk and Cava, \{Robert J.\}",

year = "2019",

month = mar,

day = "26",

doi = "10.1021/acs.chemmater.9b00258",

language = "English",

volume = "31",

pages = "2164--2173",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "6",

}

TY - JOUR

T1 - Importance of Specific Heat Characterization when Reporting New Superconductors

T2 - An Example of Superconductivity in LiGa 2 Rh

AU - Carnicom, Elizabeth M.

AU - Xie, Weiwei

AU - Yang, Zoe

AU - Górnicka, Karolina

AU - Kong, Tai

AU - Klimczuk, Tomasz

AU - Cava, Robert J.

PY - 2019/3/26

Y1 - 2019/3/26

N2 - We show that the full-Heusler compound LiGa 2 Rh is a superconductor with T c = 2.4 K. The new superconductor was found as a result of an intuition-based extension of a database search for superconductors that looked for the presence of peaks in the electronic band structure near the Fermi energy. The measurement of the entropy loss during the transition from the nonsuperconducting to the superconducting state, a straightforward measurement rarely presented in reports of "new" superconducting materials, played a critical role in identifying and isolating the superconducting compound. This study presents a particularly good example of how specific heat measurements are important for the identification and isolation of a new superconductor, since much more frequently reported resistive and magnetic susceptibility characterizations are often not enough to confirm the identification of a new superconducting material.

AB - We show that the full-Heusler compound LiGa 2 Rh is a superconductor with T c = 2.4 K. The new superconductor was found as a result of an intuition-based extension of a database search for superconductors that looked for the presence of peaks in the electronic band structure near the Fermi energy. The measurement of the entropy loss during the transition from the nonsuperconducting to the superconducting state, a straightforward measurement rarely presented in reports of "new" superconducting materials, played a critical role in identifying and isolating the superconducting compound. This study presents a particularly good example of how specific heat measurements are important for the identification and isolation of a new superconductor, since much more frequently reported resistive and magnetic susceptibility characterizations are often not enough to confirm the identification of a new superconducting material.

UR - https://www.scopus.com/pages/publications/85063146658

U2 - 10.1021/acs.chemmater.9b00258

DO - 10.1021/acs.chemmater.9b00258

M3 - Article

AN - SCOPUS:85063146658

SN - 0897-4756

VL - 31

SP - 2164

EP - 2173

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 6

ER -

Importance of Specific Heat Characterization when Reporting New Superconductors: An Example of Superconductivity in LiGa ₂ Rh

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this