HgBa_2CuO_4+δ

cuprate · tetragonal

ambient SCunconventional2D / interfacedisputed

Tc max

97.0 K

Tc ambient

97.0 K

Discovery

1997

Papers

Tc max measured at ambient, arXiv:cond-mat/0306680, confirmed by 4 papers

Evidence (34 records from 25 papers)

the flat columns above are aggregates — each line here is one paper's claim

Tc (K)	P (GPa)	Sample	Method	Pairing	Year	Paper
118.0	—	—	—	—	2001	cond-mat/0104050
97.0	ambient	—	—	—	2004	cond-mat/0408288
97.0	ambient	—	—	—	2003	cond-mat/0306680
97.0	ambient	—	—	—	2003	cond-mat/0309492
95.6	ambient	—	—	—	2004	cond-mat/0401505
95.6	ambient	—	resistivity	—	2004	cond-mat/0406340
95.6	ambient	—	—	—	2002	cond-mat/0204236
95.6	ambient	polycrystal	susceptibility	—	1998	cond-mat/9812082
95.0	ambient	—	—	—	2003	cond-mat/0306698
94.0	ambient	single_crystal	susceptibility	—	2004	cond-mat/0403343
94.0	ambient	single_crystal	susceptibility	—	2003	cond-mat/0309492
89.9	ambient	single_crystal	susceptibility	—	2001	cond-mat/0110468
60.0	ambient	polycrystal	muSR	d-wave	1999	cond-mat/9903117
60.0	ambient	powder	susceptibility	—	1999	cond-mat/9911116
47.8	ambient	polycrystal	susceptibility	—	1999	cond-mat/9905332
47.6	ambient	polycrystal	susceptibility	—	1999	cond-mat/9905332
47.5	ambient	polycrystal	susceptibility	—	1999	cond-mat/9905332
47.4	0.6	polycrystal	susceptibility	—	1999	cond-mat/9905332
47.3	ambient	polycrystal	susceptibility	—	1999	cond-mat/9905332
47.2	0.7	polycrystal	susceptibility	—	1999	cond-mat/9905332
40.0	ambient	polycrystal	susceptibility	—	1999	cond-mat/9905332
35.0	ambient	polycrystal	muSR	d-wave	1999	cond-mat/9903117
—	ambient	powder	susceptibility, muSR	d-wave	2003	cond-mat/0304043
—	ambient	—	—	—	2000	cond-mat/0011381
—	ambient	—	susceptibility	—	1999	cond-mat/9903285
—	ambient	polycrystal	resistivity	—	1999	cond-mat/9904116
—	ambient	—	resistivity	—	1999	cond-mat/9904254
—	ambient	—	—	—	1999	cond-mat/9909038
—	—	—	—	—	1999	cond-mat/9909038
—	ambient	—	susceptibility	d-wave	1998	cond-mat/9807404
—	ambient	polycrystal	resistivity	—	1998	cond-mat/9810167
—	ambient	—	STM	s-wave	1998	cond-mat/9811303
—	ambient	—	muSR	—	1997	cond-mat/9706151
—	ambient	—	susceptibility	d-wave	1997	cond-mat/9712189

Structure

Crystal structure: tetragonal
Space group: P/4mmm
Lattice a (Å): 3.880
Lattice c (Å): 9.500

Superconducting parameters

Pairing symmetry: d-wave
Gap structure: nodal
λ_eph (e–ph coupling): 1.00

Samples & pressure

Sample form: polycrystal
Pressure type: none
Doping type: hole
Doping level: 0.107