Superconducting Transition Temperature and Critical Pressure in Organic Conductor

•	A family of TMTSF Superconductors

Material	Pc [kbar]	Tc [K]	Ref.	
(TMTSF)2PF6	12	0.9	[]	
(TMTSF)2Sb6	10.5	0.38	[]	
(TMTSF)2TaF6	11	1.35	[2]	
(TMTSF)2ClO4	0	1.4	[2]	
(TMTSF)2AsF6	9.5	1.1	[2]	
(TMTSF)2ReO4	9.5	1.2	[2]	
(TMTSF)2FSO3	5	3	[, ]	

•	A family of TMTTF Superconductors

Material	Pc [kbar]	Tc [K]	Ref.	
(TMTTF)2Br	12	0.9	[]	

•	A family of BEDT-TTF(=ET) Superconductor

Material	Pc [kbar]	Tc [K]	Ref.	
(ET)2ReO4	4.0	2.0	[]	
bL-(ET)2I3	0	1.5	[]	
b-(ET)2IBr2	0	2.7	[]	
bH-(ET)2I3	0	8.1	[, ]	
b-(ET)2AuI2	0	4.9	[]	
g-(ET)3I2.5	0	2.5	[]	
k-(ET)4Hg2.89Cl8	12	1.8	[]	
q-(ET)2I3	0	3.6	[]	
k-(ET)2I3	0	3.6	[]	
k-(ET)4Hg2.78Br8	0	4.3	[]	
(ET)3Cl2(H2O)2	16	2	[]	
k-(ET)2Cu(NCS)2	0	10.4	[]	
k-(ET)2Cu(NCS)2 deuterated	0	11.2	[]	
a-(ET)2NH4Hg(SCN)4	0	0.8	[]	
k-(ET)2Cu[N(CN)2]Br	0	11.8	[]	
k-(ET)2Ag(CN)2H2O	0	5.0	[]	
k-(ET)2Cu[N(CN)2]Cl	0.3	12.8	[]	
k-(ET)2Cu[N(CN)2]Cl deuterated	0.3	13.1	[]	
				
Material	Pc [kbar]	Tc	Ref	
k-(ET)2Cu[N(CN)2]Br deuterated	0	11.2	[]	
k-(ET)2Cu2(CN)3	1.5	2.8	[]	
k’-(ET)2Cu2(CN)3	0	4.1	[]	
(ET)4Pt(CN)4H2O	6.5	2	[]	
k-(ET)2Cu(CN)[N(CN)2]	0	11.2	[27]	
k-(ET)2Cu(CN)[N(CN)2] deuterated	0	12.3	[]	
(ET)4Pd(CN)4H2O	7	1.2	[]	
k-(ET)2Cu[N(CN)2]Cl0.5Br0.5	0	11.3	[]	
a-(ET)2KHg(SCN)4	0	0.3	[] 	
	1.2	1.2	[] 	
a-(ET)2RbHg(SCN)4	0	0.5	[32]	
a-(ET)2TlHg(SCN)4	0	0.1	[32]	
k-(ET)2Cu[N(CN)2]Cl0.25Br0.75	0	11.5	[]	
k-(ET)2Cu[N(CN)2]Cl0.15Br0.85	0	10	[]	
kL-(ET)2Cu(CF3)4TCE	0	4.0	[]	
kH-(ET)2Cu(CF3)4TCE	0	9.2	[36]	
kH-(ET)2Ag(CF3)4TCE	0	11.1	[]	
k-(ET)2Cu[N(CN)2]Br0.9I0.1	3	5.9	[]	
kH-(ET)2Ag(CF3)4TBE	0	7.2	[]	
kL-(ET)2Cu(CF3)4TBE	0	5.2	[]	
kL-(ET)2Ag(CF3)4121DBCE	0	4.5	[] 	
kL-(ET)2Ag(CF3)4121DCBE	0	3.8	[]	
kL-(ET)2Ag(CF3)4112DCBE	0	10.2	[]	
kL-(ET)2Cu(CF3)4112DCBE	0	4.9	[]	
kL-(ET)2Ag(CF3)4112DCBE	0	4.1	[]	
b”-(ET)4Fe(C2O4)3H2OPhCN	0	6.5	[]	
kH-(ET)2Au(CF3)4TCE	0	10.5	[]	
kH-(ET)2Ag(CF3)4121DBCE	0	7.3	[]	
kL-(ET)2Au(CF3)4TBE	0	5.8	[]	
kL-(ET)2Cu(CF3)4121DBCE	0	5.5	[41]	
kL-(ET)2Au(CF3)4112DCBE	0	5.0	[]	
kL-(ET)2Au(CF3)4121DBCE	0	5.0	[41]	
kL-(ET)2Ag(CF3)4TBE	0	4.8	[]	
kL-(ET)2Ag(CF3)4121DBCE	0	4.5	[41]	
kL-(ET)2Cu(CF3)4121DCBE	0	3.5	[]	
kL-(ET)2Au(CF3)4121DCBE	0	3.2	[]	
kL-(ET)2Ag(CF3)4TCE	0	2.4	[47]	
kL-(ET)2Au(CF3)4TCE	0	2.1	[47]	
b”-(ET)2SF5CH2CF2SO3	0	5.3	[47]	

•	
A family of BEDT-TSF(=BETS) Superconductors

Material	Pc [kbar]	Tc [K]	Ref.	
l-(BETS)2GaCl4	0	8.0	[]	
l-(BETS)2(FexGa1-x)Cl4	0	4.5<Tc<6.0	[]	
l-(BETS)2GaBrxCl4-x	0	5.0<Tc<7.0	[]	
k-(BETS)2FeBr4	0	1.0	[]	
(BETS)2(Cl2TCNQ)	3.5	1.3	[]	

•	Other Superconductors

Material	Pc [kbar]	Tc [K]	Ref.	
(TMET-STF)2BF4	0	4.1	[]	
(BEDO-TTF)2ReO4·H2O	0	1.4	[]	

Superconducting Properties

•	Hc2(0) and x(0) for bL-(ET)2I3 and bL-(d8-ET)2I3 []

Material	Direction of H	Hc2(0) [kOe]	x(0) [Å]	
	|| stack	20.9	587	
bL-(ET)2I3	⊥ stack	24.8	696	
	|| c*	0.81	22.6	
	|| stack	25.8	506	
bL-(d8-ET)2I3	⊥ stack	25.5	500	
	|| c*	1.3	25.5	

•	Superconducting Properties of b-(ET)2X

Material	Hc1(T)[Oe]	Hc2(0)[Oe]a	x(0)[Å]		
	a	b	c	a	b	c	a	b	c	Ref.	
bL-(ET)2I3	0.05	0.09	1.15							[]	
				17.8	17.0	0.8	633	608	29	[]	
bH-(ET)2I3											
at 1.6 kbar				250b		27	127			[]	
3.5 kbar				41		2.6	355c		22.7	[64]	
5.0 kbar				21.8		1.4	488c		31	[64]	
bH-(ET)2IBr2				33.6	36.0	15	463	444	18.5	[]	
	3.9	16								[]	
bH-(ET)2AuI2	4.0	20.5		66.3		5.1	249c		19.2	[66]	

The superscripts mean:
 a Extrapolated to 0 K
 b No direction specified in the ab-plane

•	Superconducting Properties: denotes the orbital critical field

Quantity(method)	k-(ET)2Cu(NCS)2	k-(ET)2Cu[N(CN)2]Br	Ref.	
Tc	9.4  0.3 K	11.4  0.2 K		
Hc2⊥’|Tc(Mdc)	9.7  2 kOe/K	38  18 kOe/K	[]	
Hc2||’|Tc(Mdc)	130 15 kOe/K	210  30 kOe/K	[67]	
Hc2⊥(0) (extrapolation)	60  10 kOe	80  20 kOe/K		
Hc2⊥(0) (NMR)		100 kOe	[]	
Hc2*⊥(0)=0.73Hc2⊥’Tc	67  16 kOe	316  160		
Hc2||(0)(r extrapolated)	210  10 kOe		[]	
Hc2*||(0)	850  100 kOe	1660  240 kOe		
l||(0)	5100 – 8000	6500-8400	[, , ]	
x||(0)	30-60	20-30	[67, , ]	
x⊥(0)	3-6	5-7	[67, 73, 74]	
k||	145  60	300  120		
Hc(0)=f0/23/2l(0)x(0)	790  300 Oe	1250  300 Oe		
Hc(0)=(2pg0V-1mol)1/2Tc	530  50 Oe	630  50 Oe		
DC/(gTc)	2  0.3	2  0.5	[, ]	
2D0/(kBTc)	5-7		[, ]	

Definition 
Ginzburg-Landau coherence lengths perpendicular and parallel to the conducting plane, x⊥ and x||, respectively, the following relations are used[]:

and

,
where Hc2’, Hc2||’ are the initial slope of the upper critical fields for H perpendicular and parallel to the conducting plane, respectively.

•	
Listing of GL coherence length x(0) values for k-(ET)2Cu(NCS)2 and k-(ET)2Cu[N(CN)2]Br

Material	Tc0	x(0)⊥ [nm]	x(0)|| [nm]	Ref.	
k-(ET)2Cu(NCS)2	8.7±0.2	0.31±0.05	2.9±0.5	[74]	
	9.4	0.3	6.5	[75]	
	10.4	0.96	18.2	[]	
	10.5	0.77	14.3a	[]	
k-(d8-ET)2Cu(NCS)2	9.0±0.2	0.32±0.05	2.9±0.5	[74]	
k-(13C-ET)2Cu(NCS)2	8.6±0.2	0.31±0.05	2.9±0.5	[74]	
k-(ET)2Cu[N(CN)2]Br	10.9±0.2	0.58±0.1	2.3±0.4	[74]	
	10.8±0.05	0.4	3.7	[]	
k-(d8-ET)2Cu[N(CN)2]Br	10.6±0.2	0.57±0.1	2.3±0.4	[74]	
k-(13C-ET)2Cu[N(CN)2]Brb	10.9±0.2	0.58±0.1	2.3±0.4	[74]	
k-(13C-ET)2Cu[N(CN)2]Brc	12.2		6.0	[68]	

a This value is given by , where xb(0) = 17.4 nm and xc(0) = 11.8 nm
b Enriched 13C at CH2 sites
c Enriched 13C at central C sites