Embedded Files
Recent Publication, 4 June, 2025
Anisotropic field-induced changes in the superconducting order parameter of UTe2
Magnetic-field-dependent heat capacity measurements are carried out on an ultrapure sample of the UTe2 superconductor along different crystallographic directions. By analyzing the resulting field-dependent residual Sommerfeld coefficients, a case is made that 𝐵2𝑢 is the primary superconducting order parameter in UTe2.
Phys. Rev. Research 7, L022053 (2025).
Normal Fermi Surface in the Nodal Superconductor CeCoIn5 Revealed via Thermal Conductivity
In CeCoIn₅, thermal conductivity measured under a rotating magnetic field shows a sharp resonance at a specific angle, consistent across different heat current directions. This indicates the resonance originates from the Fermi surface structure. The effect is attributed to uncondensed Landau quasiparticles induced by the magnetic field. Supporting DFT calculations reveal angle-dependent peaks in the density of states, demonstrating that rotating-field thermal conductivity can probe the normal Fermi surface within the superconducting state.
Phys. Rev. Lett. 132, 236002 (2024).
Published Papers
Published Papers
Sangyun Lee - Google Scholar
[1] “Textured superconducting phase in the heavy fermion CeRhIn5” Sangyun Lee & Tuson Park, Phys. High Technol. 56 July/August (2012).
[2] “Pressure dependence of upper critical fields in FeSe single crystals” Ji-Hoon Kang, Soon-Gil Jung, Sangyun Lee, Eunsung Park, Jiunn-Yuan Lin, Dmitriy A Chareev, Alexander N Vasiliev & Tuson Park, Superconductor Science and Technology 29 3 035007 (2016).
[3] “Enhanced critical current density in the pressure-induced magnetic state of the high-temperature superconductor FeSe” Soon-Gil Jung, Ji-Hoon Kang, Eunsung Park, Sangyun Lee, Jiunn-Yuan Lin, Dmitriy A. Chareev, Alexander N. Vasiliev & Tuson Park Scientific Report 5 16358 (2015).
[4] “Synthesis and characterization of the heavy-fermion compound CePtAl4Ge2” Soohyeon Shin, Priscila F. S. Rosa, Filip Ronning, Joe D. Thompson, Brian L. Scott, Sangyun Lee, Harim Jang, Soon-Gil Jung, Eunbhin Yun, Hyoyoung Lee, Eric D. Bauer & Tuson Park, J. Alloys and Compounds 738, 550 (2018).
[5] “A peak in the critical current density for quantum critical superconductors” Soon-Gil Jung, Soonbeom Seo, Sangyun Lee, Eric D. Bauer, Han-Oh Lee & Tuson Park Nature Communications 9, 434 (2018).
[6] “Spectroscopic evidence for two-gap superconductivity in the quasi-one dimensional chalcogenide Nb2Pd0.81S5” Eunsung Park*, Sangyun Lee*, Filip Ronning, Joe D. Thompson, Qiu Zhang, Luis Balicas, Xin Lu & Tuson Park, J. Phys.: Condens. Matter 30(16), 165401 (2018).
[7] “Origin of extremely large magnetoresistance in the candidate type-II Weyl semimetal MoTe2-x” Sangyun Lee, Jaekyung Jang, Sung-Il Kim, Soon-Gil Jung, Jihyun Kim, Suyeon Cho, Sung Wng Kim, Joo Yull Rhee, Kee-Su Park & Tuson Park, Scientific Report 8 13937 (2018).
[8] “Indium-free amorphous Ca-Al-O thin film as transparent conducting oxide” So Hee Sim, Kyeong Tae Kang, Miso Lee, Hiroki Taniguchi, Sang A Lee, Sangyun Lee, Seulki Roh, Jun Hyeob Oh, Jong-Seong Bae, Tuson Park, Jungseek Hwang, Seungwu Han, Jae Hyuck Jang & Woo Seok Choi, Chem. Mater 31, 8019 (2019).
[9] “Synthesis of Heavy Fermion CeCoIn5 Thin Film via Pulsed Laser Deposition” Jihyun Kim, Hanul Lee, Sangyun Lee, Sungmin Park, Tuson Park, YoonHee Cho, Hyoyoung Lee, Won Nam Kang, & Woo Seok Choi, Curr. Appl. Phys. 19, 12, 1338 (2019).
[10] “Band Gap Investigation of CVD-grown 1T’-MoTe2 via Infrared Spectroscopy”, Jin Cheol Park, Eilho Jung, Sangyun Lee, Jungseek Hwang, & Young Hee Lee, Phys. Rev. B 101, 235434 (2020)
[11] “Pressure dependence of antiferromangnetic and superconducting phase in U2PtxRh(1−x)C2”, Sangyun Lee, F. Ronning, Yongkang Luo, N. Wakeham, E. D. Bauer, Duk Y. Kim, Joe D. Thompson & Tuson Park, Phys. Rev. B 102, 035124 (2020).
[12] “Evolution of antiferromagnetism in Zn-doped heavy-fermion compound CeRh(In1-xZnx)5” Tae Beom Park, Soohyeon Shin, Sangyun Lee, Soonbeom Seo, Harim Jang, Jihyun Kim, Hyoyoung Lee, Honghong Wang, Hanoh Lee & Tuson Park, Phys. Rev. Matterials, 4, 084801 (2020).
[13] “Tuning the CDW quantum critical point and the appearance of superconductivity in TiSe2” Sangyun Lee, Tae Beom Park, Jihyun Kim, Soon-Gil Jung, Won Kyung Seong, Yongkang Luo, Hyeong Joon Lim, J. D. Thompson, Namjung Hur, Duk Y. Kim & Tuson Park, Phys. Rev. Research, 3, 033097 (2021).
[14] “Physical properties of quasi-one-dimensional YbFe5P3” A. Asaba, Sangyun Lee, S. Seo, K. E. Avers, S. M. Thomas, R. Movshovich, J. D. Thompson, P. F. S. Rosa, E. D. Bauer & F. Ronning, Phys. Rev. B 104, 19514 (2021).
[15] “Ubiquitous Spin Freezing in the Superconducting State of UTe2” Shyam Sundar, Nasrin Azari1, Mariah Goeks, Shayan Gheidi, Mae Abedi, Michael Yakovlev, Sarah R. Dunsiger, John M. Wilkinson, Stephen J. Blundell, Shanta R. Saha, Johnpierre Paglione, Nicholas P. Butch, Sangyun Lee, R. Movshovich, Priscila F. S. Rosa, Sean M. Thomas & Jeff E. Sonier, Communications physics 6, 24 (2023).
[16] “Electronic and magnetic phase diagrams of Kitaev quantum spin liquid candidate Na2Co2TeO6” Shengzhi Zhang, Sangyun Lee, Andrew J. Woods, Sean M. Thomas, Roman Movshovich, Eric Brosha, Qing Huang, Haidong Zhou, Vivien S. Zapf & Minseong Lee, Phys. Rev. B. 108, 064421 (2023).
[17] “Signatures of a Majorana-Fermi surface in the Kitaev magnet Ag3LiIr2O6” Joshuah T. Heath, Faranak Bahrami, Sangyun Lee, Roman Movshovich, Xiao Chen, Kevin S. Bedell, & Fazel Tafti, Comms. Phys. 6 348 (2023).
[18] “A Quenched Disorder in the Quantum-Critical Superconductor CeCoIn5” Soon-Gil Jung, Harim Jang, Jihyun Kim, Jin-Hong Park, Sangyun Lee, Soonbeom Seo, Eric Bauer & Tuson Park, Adv. Sci. 11, 2304837 (2023).
[19] “Nonlinear magnons and exchange Hamiltonians of the delafossite proximate quantum spin liquid candidates KYbSe2 and NaYbSe2” A. O. Scheie, Y. Kamiya, Hao Zhang, Sangyun Lee, A. J. Woods, M. G. Gonzales, J. Xing, D. M. Pajerowski, Haidong Zhou, A. S. Sefat, L. Messio, R. Movshovich, C. D. Batista &D. A. Tennant, Phys. Rev. B 109, 014425 (2023).
[20] “Proximate spin liquid and fractionalization in the triangular antiferromagnet KYbSe2” A. O. Scheie, E. A. Ghioldi, J. Xing, Sangyun Lee, A. D. Woods, R. Movshovich, A. M. Paddison, N. E. Sherman, M. Dupont, D. Abernathy, D. M. Pajerowski, Shang-Shun Zhang, L. O. Manuel, A. E. Trumper, C. D. Pemmaraju, A. S. Sefat, D. S. Parker, T. P. Devereaux, J. E. Moore, C. D. Batista, & D. A. Tennant, Nat. Phys. 20, 74 (2024).
[21] “Magnetic field induced Quantum Criticalities in the triangular antiferromagnet KYbSe2” Sangyun Lee, Andrew J. Woods, A. O. Scheie, D. A. Tennant, J. Xing, A. S. Sefat, C. D. Batista & R. Movshovich, Phys. Rev. B. 109, 155129 (2024).
[22] “Normal Fermi Surface in the Nodal Superconductor CeCoIn5 Revealed via Thermal Conductivity” Sangyun Lee, Duk Y. Kim, Shi-Zeng Lin, Priscila F. S. Rosa, Eric D. Bauer, Filip Ronning, J. D. Thompson & R. Movshovich, accepted by Phys. Rev. Lett. 132, 236002 (2024).
[23]“Out-of-plane magnetic phase diagram of Kitaev quantum spin liquid candidate Na2Co2TeO6” Shengzhi Zhang, Sangyun Lee, Eric Brosha, Qing Huang, Haidong Zhou, Vivien S. Zapf & Minseong Lee, under review in Phys. Rev. B 110, 144431 (2024).
[24]“Quantum Order by Disorder: A Key to Understanding the Magnetic Phases of BaCo2(AsO4)2” Sangyun Lee, Shengzhi Zhang, Lucas A. Pressley, Craig A Bridges, Ramesh Dhakal, Stephen M. Winter, Minseong Lee & Vivien S. Zapf, under review in npj Quantum Materials 10, 11 (2025).
[25] “Anisotropic field-induced changes in the superconducting order parameter of UTe2” Sangyun Lee, Andrew J. Woods, P. F. S. Rosa, E. D. Bauer, Shizeng Lin & R. Movshovich, Phys. Rev. Research 7, L022053 (2025).
Google Sites
Report abuse