@article {1373,
	title = {ASYMMETRIC PHASE-DIAGRAM AND COVERAGE DEPENDENT EFFECTIVE PAIR INTERACTIONS FOR HYDROGEN ON CLOSE-PACKED METAL-SURFACES},
	journal = {Surface Science},
	volume = {280},
	number = {3},
	year = {1993},
	note = {<p>ISI Document Delivery No.: KG609Times Cited: 3Cited Reference Count: 51Cited References:      PERSSON BNJ, 1991, SURF SCI, V258, P451, DOI 10.1016/0039-6028(91)90937-N     DUNWEG B, 1991, J CHEM PHYS, V94, P3958     SOKOLOWSKI M, 1991, SURF SCI, V243, P261, DOI 10.1016/0039-6028(91)90364-X     GUNTHER CCA, 1990, PHYS REV B, V42, P10738, DOI 10.1103/PhysRevB.42.10738     AUKRUST T, 1990, PHYS REV B, V41, P8772, DOI 10.1103/PhysRevB.41.8772     EINSTEIN TL, 1990, SURF SCI, V227, P114, DOI 10.1016/0039-6028(90)90398-R     BARTELT NC, 1989, PHYS REV B, V40, P10759, DOI 10.1103/PhysRevB.40.10759     WILLE LT, 1989, PHYS REV B, V40, P6931, DOI 10.1103/PhysRevB.40.6931     FELTER TE, 1989, PHYS REV B, V40, P891, DOI 10.1103/PhysRevB.40.891     BERERA A, 1989, PHYS REV B, V39, P6727, DOI 10.1103/PhysRevB.39.6727     CHOU MY, 1989, PHYS REV B, V39, P5623, DOI 10.1103/PhysRevB.39.5623     DEFONTAINE D, 1989, ALLOY PHASE STABILIT, P177     WILLE LT, 1988, PHYS REV B, V37, P2227, DOI 10.1103/PhysRevB.37.2227     CHRISTMANN K, 1988, SURF SCI REP, V9, P1, DOI 10.1016/0167-5729(88)90009-X     LINDROOS M, 1987, SURF SCI, V192, P421     DEFONTAINE D, 1987, PHYS REV B, V36, P5709, DOI 10.1103/PhysRevB.36.5709     GONIS A, 1987, PHYS REV B, V36, P4630, DOI 10.1103/PhysRevB.36.4630     MACGILLIVRAY IR, 1987, PHYS REV B, V35, P3545, DOI 10.1103/PhysRevB.35.3545     DAW MS, 1987, PHYS REV B, V35, P2128, DOI 10.1103/PhysRevB.35.2128     LINDROOS M, 1987, SURF SCI, V180, P237, DOI 10.1016/0039-6028(87)90046-X     ROELOFS LD, 1986, SURF SCI, V176, P295, DOI 10.1016/0039-6028(86)90177-9     MUSCAT JP, 1986, PHYS REV B, V33, P8136, DOI 10.1103/PhysRevB.33.8136     FELTER TE, 1986, SURF SCI, V171, pL379, DOI 10.1016/0039-6028(86)90548-0     FEULNER P, 1985, SURF SCI, V154, P465, DOI 10.1016/0039-6028(85)90045-7     NAGAI K, 1984, PHYS REV B, V30, P1461, DOI 10.1103/PhysRevB.30.1461     PENKA V, 1984, SURF SCI, V136, P307, DOI 10.1016/0039-6028(84)90614-9     RIKVOLD PA, 1984, PHYS REV B, V29, P6285, DOI 10.1103/PhysRevB.29.6285     SANCHEZ JM, 1984, PHYSICA A, V128, P334, DOI 10.1016/0378-4371(84)90096-7     GLOSLI J, 1983, CAN J PHYS, V61, P1515     RIKVOLD PA, 1983, PHYS REV B, V28, P2686, DOI 10.1103/PhysRevB.28.2686     IMBIHL R, 1982, SURF SCI, V117, P257, DOI 10.1016/0039-6028(82)90506-4     KINZEL W, 1982, SURF SCI, V121, P13, DOI 10.1016/0039-6028(82)90233-3     SANCHEZ JM, 1982, ACTA CRYSTALLOGR A, V38, P214, DOI 10.1107/S0567739482000485     ENGEL T, 1981, SURF SCI, V109, P140, DOI 10.1016/0039-6028(81)90517-3     SCHICK M, 1981, PROG SURF SCI, V11, P245, DOI 10.1016/0079-6816(81)90002-2     SANCHEZ JM, 1980, PHYS REV B, V21, P216, DOI 10.1103/PhysRevB.21.216     CHRISTMANN K, 1979, J CHEM PHYS, V70, P4168, DOI 10.1063/1.438041     DOMANY E, 1978, PHYS REV B, V18, P2209, DOI 10.1103/PhysRevB.18.2209     SANCHEZ JM, 1978, PHYS REV B, V17, P2926, DOI 10.1103/PhysRevB.17.2926     WANG WY, 1978, SURF SCI, V77, P550     DOMANY E, 1977, PHYS REV LETT, V38, P1148, DOI 10.1103/PhysRevLett.38.1148     ALEXANDER S, 1975, PHYS LETT A, V54, P353, DOI 10.1016/0375-9601(75)90766-5     KIKUCHI R, 1974, J CHEM PHYS, V60, P1071, DOI 10.1063/1.1681115     HIJMANS J, 1955, PHYSICA, V21, P485     HIJMANS J, 1955, PHYSICA, V21, P499     HIJMANS J, 1955, PHYSICA, V21, P471     BARKER JA, 1953, PROC R SOC LON SER-A, V216, P45, DOI 10.1098/rspa.1953.0005     HENRY NFM, 1952, INT TABLE CRYSTALLOG, V1     KIKUCHI R, 1951, PHYS REV, V81, P988, DOI 10.1103/PhysRev.81.988     LIFSHITZ EM, 1942, J PHYS MOSCOW, V7, P251     LIFSHITZ EM, 1942, J PHYS MOSCOW, V7, P61SUN, SN CHOU, MYELSEVIER SCIENCE BVAMSTERDAM</p>
},
	month = {Jan},
	pages = {415-429},
	type = {Article},
	abstract = {<p>The asymmetry in the phase diagram of the H/Ru(001) system is studied by assuming a lattice gas model for the chemisorbed hydrogen and using the cluster variation method. Ground state analysis of the ordered structures shows that the effective pair interaction for the next-nearest neighbors has to be repulsive. We also found that the order-disorder transition temperatures and hence the phase diagram are very sensitive to upsilon3, the ratio of the effective next-nearest to nearest neighbor interactions of H adatoms. The asymmetry in the phase diagram, which cannot be accounted for by the adsorbate relaxation model by Persson [Surf. Sci. 258 (1991) 451], is attributed to the coverage dependence of the effective pair interactions. By assuming a simple piecewise linear dependence of upsilon3 on the chemical potential, we constructed an asymmetric phase diagram which is in excellent agreement with the experimental data. The model studied can be applied to the H/Pd(111) system directly and can be easily generalized for other close-packed metal surfaces.</p>
},
	keywords = {ADSORPTION, BASAL-PLANE, CLASSIFICATION, CLUSTER-VARIATION METHOD, ELECTRON REFLECTION, LATTICE-GAS MODEL, ORDER-DISORDER TRANSITIONS, RUTHENIUM 001, SUBSURFACE OCCUPATION, YBA2CU3OZ},
	isbn = {0039-6028},
	url = {<Go to ISI>://WOS:A1993KG60900020},
	author = {Sun, S. N. and Chou, M. Y.}
}
