Kallin, C. Chiral p-wave order in Sr2RuO4. Rep. Prog. Phys. 75, 042501 (2012).

Article 
ADS 

Google Scholar
 

Vollhardt, D. & Wölfle, P. The Superfluid Phases of Helium 3 (Courier Corporation, 2013).

Sigrist, M. & Ueda, K. Phenomenological theory of unconventional superconductivity. Rev. Mod. Phys. 63, 239–311 (1991).

Article 
ADS 

Google Scholar
 

Sato, M. & Ando, Y. Topological superconductors: a review. Rep. Prog. Phys. 80, 076501 (2017).

Article 
ADS 
MathSciNet 

Google Scholar
 

Theuss, F. et al. Single-component superconductivity in UTe2 at ambient pressure. Nat. Phys. 20, 1124–1130 (2024).

Article 

Google Scholar
 

Rosa, P. F. S. et al. Single thermodynamic transition at 2 K in superconducting UTe2 single crystals. Commun. Mater. 3, 33 (2022).

Article 

Google Scholar
 

Braithwaite, D. et al. Multiple superconducting phases in a nearly ferromagnetic system. Commun. Phys. 2, 147 (2019).

Article 

Google Scholar
 

Thomas, S. M. et al. Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate-valence UTe2. Sci. Adv. 6, eabc8709 (2020).

Article 
ADS 

Google Scholar
 

Wu, Z. et al. Magnetic signatures of pressure-induced multicomponent superconductivity in UTe2. Phys. Rev. Lett. 134, 236501 (2025).

Article 
ADS 

Google Scholar
 

Vasina, T. et al. Connecting high-field and high-pressure superconductivity in UTe2. Phys. Rev. Lett. 134, 096501 (2025).

Article 
ADS 

Google Scholar
 

Yip, S. K., Li, T. & Kumar, P. Thermodynamic considerations and the phase diagram of superconducting UPt3. Phys. Rev. B 43, 2742–2747 (1991).

Article 
ADS 

Google Scholar
 

Ghosh, S. et al. Thermodynamic evidence for a two-component superconducting order parameter in Sr2RuO4. Nat. Phys. 17, 199–204 (2021).

Article 

Google Scholar
 

Kamat, S. et al. Vanishing phase stiffness and fluctuation-dominated superconductivity: evidence for inter-band pairing in UTe2. Phys. Rev. X 16, 041006 (2026).


Google Scholar
 

Callen, H. B. Thermodynamics and an Introduction to Thermostatistics (John Wiley & Sons, 1991).

Tinkham, M. Introduction to Superconductivity (Courier Corporation, 2004).

Rehwald, W. The study of structural phase transitions by means of ultrasonic experiments. Adv. Phys. 22, 721–755 (1973).

Article 
ADS 

Google Scholar
 

Ran, S. et al. Extreme magnetic field-boosted superconductivity. Nat. Phys. 15, 1250–1254 (2019).

Article 

Google Scholar
 

Nandi, S. et al. Anomalous suppression of the orthorhombic lattice distortion in superconducting Ba(Fe1-xCox)2As2 single crystals. Phys. Rev. Lett. 104, 057006 (2010).

Article 
ADS 

Google Scholar
 

Fernandes, R. M. & Schmalian, J. Competing order and nature of the pairing state in the iron pnictides. Phys. Rev. B 82, 014521 (2010).

Article 
ADS 

Google Scholar
 

Bishop, D. J. et al. Ultrasonic attenuation in UPt3. Phys. Rev. Lett. 53, 1009–1011 (1984).

Article 
ADS 

Google Scholar
 

Batlogg, B. et al. Ultrasound studies of the heavy fermion superconductors UPt3, UBe13 and (U, Th)Be13. Physica B+C 135, 23–26 (1985).

Article 
ADS 

Google Scholar
 

Helm, T. et al. Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe2. Nat. Commun. 15, 37 (2024).

Article 
ADS 

Google Scholar
 

Rosuel, A. et al. Field-induced tuning of the pairing state in a superconductor. Phys. Rev. X 13, 011022 (2023).


Google Scholar
 

Vasina, T. et al. Quantitative thermodynamic study of superconducting and normal states in UTe2 under pressure. Phys. Rev. B 113, 235159 (2026).

Article 

Google Scholar
 

Sakai, H. et al. Field induced multiple superconducting phases in UTe2 along hard magnetic axis. Phys. Rev. Lett. 130, 196002 (2023).

Article 
ADS 

Google Scholar