Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2

Lee, Sangyun; Luo, Yongkang; Bauer, Eric Dietzgen; Thompson, Joe David; Ronning, Filip; Wakeham, Nickolas; Kim, Duk Young; Park, Tuson

doi:10.1103/physrevb.102.035124

Title: Pressure dependence of antiferromagnetic and superconducting phases in U₂Rh_1–xPt_xC₂

Abstract

In this work, we report temperature (T)- and pressure (P)-dependent resistivity measurements on the isostructural compounds U₂Rh_1–xPt_xC₂ (x = 0, 0.5, and 0.9) from which we construct a T–P–x phase diagram. Compounds with x = 0 and x = 0.5 are antiferromagnets below 22.1 and 9.4 K, respectively, and their Néel temperature (T_N) decreases under applied pressure. For x = 0, the critical pressure P_c required to suppress T_N to zero temperature is projected to be about 8.8 GPa, but P_c for x = 0.5 is between 1.6 and 2.1 GPa. At atmospheric pressure, increasing Pt concentration in U₂Rh_(1–x)Pt_xC₂ tunes magnetic transition temperatures to zero at a critical value of x_c ≈ 0.7, and, consequently, we surmise the existence of a quantum-phase boundary in the P–x plane at T = 0 K that extends from (P = 0, x = xc) to (P_c ≈ 8.8 GPa, x = 0). For x = 0.9, superconductivity appears at T_c = 1.09 K , which decreases at a rate of ≈ –1 K/GPa that is nearly twice that found for U₂PtC₂ whose T_c is 1.47 K. Together, these results indicate that domes of magnetism and superconductivity formed with T–P–x variations are detached andmore »« less

Authors:

^[1]; Luo, Yongkang ^[2];

^[3];

^[4];

^[5]; Park, Tuson ^[5]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sungkyunkwan Univ., Suwon (Republic of Korea)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Huazhong Univ. of Science and Technology, Wuhan (China)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States)
Sungkyunkwan Univ., Suwon (Republic of Korea)

Publication Date:: Mon Jul 13 00:00:00 EDT 2020

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA); National Research Foundation of Korea (NRF)

OSTI Identifier:: 1726190

Report Number(s):: LA-UR-20-22135
Journal ID: ISSN 2469-9950; TRN: US2205079

Grant/Contract Number:: 89233218CNA000001; 2012R1A3A2048816

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 102; Journal Issue: 3; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Material Science

Citation Formats


                    Lee, Sangyun, Luo, Yongkang, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Wakeham, Nickolas, Kim, Duk Young, and Park, Tuson. Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevb.102.035124.

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                    Lee, Sangyun, Luo, Yongkang, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Wakeham, Nickolas, Kim, Duk Young, & Park, Tuson. Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2.  United States.  https://doi.org/10.1103/physrevb.102.035124

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                    Lee, Sangyun, Luo, Yongkang, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Wakeham, Nickolas, Kim, Duk Young, and Park, Tuson. Mon .  
"Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2".  United States.  https://doi.org/10.1103/physrevb.102.035124.  https://www.osti.gov/servlets/purl/1726190.

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@article{osti_1726190,

  title        = {Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2},

  author       = {Lee, Sangyun and Luo, Yongkang and Bauer, Eric Dietzgen and Thompson, Joe David and Ronning, Filip and Wakeham, Nickolas and Kim, Duk Young and Park, Tuson},

  abstractNote = {In this work, we report temperature (T)- and pressure (P)-dependent resistivity measurements on the isostructural compounds U2Rh1–xPtxC2 (x = 0, 0.5, and 0.9) from which we construct a T–P–x phase diagram. Compounds with x = 0 and x = 0.5 are antiferromagnets below 22.1 and 9.4 K, respectively, and their Néel temperature (TN) decreases under applied pressure. For x = 0, the critical pressure Pc required to suppress TN to zero temperature is projected to be about 8.8 GPa, but Pc for x = 0.5 is between 1.6 and 2.1 GPa. At atmospheric pressure, increasing Pt concentration in U2Rh(1–x)PtxC2 tunes magnetic transition temperatures to zero at a critical value of xc ≈ 0.7, and, consequently, we surmise the existence of a quantum-phase boundary in the P–x plane at T = 0 K that extends from (P = 0, x = xc) to (Pc ≈ 8.8 GPa, x = 0). For x = 0.9, superconductivity appears at Tc = 1.09 K , which decreases at a rate of ≈ –1 K/GPa that is nearly twice that found for U2PtC2 whose Tc is 1.47 K. Together, these results indicate that domes of magnetism and superconductivity formed with T–P–x variations are detached and that the two broken symmetries are independent of each other. Fluctuations in average composition produce rare regions that play an important role in determining physical properties of materials with noninteger x.},

  doi          = {10.1103/physrevb.102.035124},

  journal      = {Physical Review B},

  number       = 3,

  volume       = 102,

  place        = {United States},

  year         = {Mon Jul 13 00:00:00 EDT 2020},

  month        = {Mon Jul 13 00:00:00 EDT 2020}

}

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Title: Pressure dependence of antiferromagnetic and superconducting phases in U2Rh1–xPtxC2

Abstract

Citation Formats

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Title: Pressure dependence of antiferromagnetic and superconducting phases in U₂Rh_1–xPt_xC₂

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